1 |
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2 | # TODO: Need a SETUP section.
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3 |
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4 | #### SETUP
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5 | a=(1 '2 3')
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6 |
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7 | #### "${a[@]}" and "${a[*]}"
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8 | a=(1 '2 3')
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9 | argv.py "${a[@]}" "${a[*]}"
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10 | ## stdout: ['1', '2 3', '1 2 3']
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11 |
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12 | #### ${a[@]} and ${a[*]}
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13 | a=(1 '2 3')
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14 | argv.py ${a[@]} ${a[*]}
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15 | ## stdout: ['1', '2', '3', '1', '2', '3']
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16 |
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17 | #### 4 ways to interpolate empty array
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18 | argv.py 1 "${a[@]}" 2 ${a[@]} 3 "${a[*]}" 4 ${a[*]} 5
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19 | ## stdout: ['1', '2', '3', '', '4', '5']
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20 |
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21 | #### empty array
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22 | empty=()
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23 | argv.py "${empty[@]}"
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24 | ## stdout: []
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25 |
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26 | #### Empty array with :-
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27 | empty=()
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28 | argv.py ${empty[@]:-not one} "${empty[@]:-not one}"
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29 | ## stdout: ['not', 'one', 'not one']
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30 |
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31 | #### nounset / set -u with empty array (bug in bash 4.3, fixed in 4.4)
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32 |
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33 | # http://lists.gnu.org/archive/html/help-bash/2017-09/msg00005.html
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34 |
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35 | set -o nounset
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36 | empty=()
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37 | argv.py "${empty[@]}"
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38 | echo status=$?
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39 | ## STDOUT:
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40 | []
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41 | status=0
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42 | ## END
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43 | ## BUG mksh stdout-json: ""
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44 | ## BUG mksh status: 1
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45 |
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46 | #### local array
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47 | # mksh support local variables, but not local arrays, oddly.
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48 | f() {
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49 | local a=(1 '2 3')
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50 | argv.py "${a[0]}"
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51 | }
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52 | f
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53 | ## stdout: ['1']
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54 | ## status: 0
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55 | ## BUG mksh status: 1
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56 | ## BUG mksh stdout-json: ""
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57 |
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58 | #### Command with with word splitting in array
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59 | array=('1 2' $(echo '3 4'))
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60 | argv.py "${array[@]}"
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61 | ## stdout: ['1 2', '3', '4']
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62 |
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63 | #### space before ( in array initialization
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64 | # NOTE: mksh accepts this, but bash doesn't
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65 | a= (1 '2 3')
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66 | echo $a
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67 | ## status: 2
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68 | ## OK mksh status: 0
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69 | ## OK mksh stdout: 1
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70 |
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71 | #### array over multiple lines
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72 | a=(
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73 | 1
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74 | '2 3'
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75 | )
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76 | argv.py "${a[@]}"
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77 | ## stdout: ['1', '2 3']
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78 | ## status: 0
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79 |
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80 | #### array with invalid token
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81 | a=(
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82 | 1
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83 | &
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84 | '2 3'
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85 | )
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86 | argv.py "${a[@]}"
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87 | ## status: 2
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88 | ## OK mksh status: 1
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89 |
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90 | #### array with empty string
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91 | empty=('')
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92 | argv.py "${empty[@]}"
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93 | ## stdout: ['']
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94 |
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95 | #### Retrieve index
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96 | a=(1 '2 3')
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97 | argv.py "${a[1]}"
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98 | ## stdout: ['2 3']
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99 |
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100 | #### Retrieve out of bounds index
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101 | a=(1 '2 3')
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102 | argv.py "${a[3]}"
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103 | ## stdout: ['']
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104 |
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105 | #### Negative index
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106 | a=(1 '2 3')
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107 | argv.py "${a[-1]}" "${a[-2]}" "${a[-5]}" # last one out of bounds
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108 | ## stdout: ['2 3', '1', '']
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109 | ## N-I mksh stdout: ['', '', '']
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110 |
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111 | #### Negative index and sparse array
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112 | a=(0 1 2 3 4)
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113 | unset a[1]
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114 | unset a[4]
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115 | echo "${a[@]}"
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116 | echo -1 ${a[-1]}
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117 | echo -2 ${a[-2]}
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118 | echo -3 ${a[-3]}
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119 | echo -4 ${a[-4]}
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120 | echo -5 ${a[-5]}
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121 |
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122 | a[-1]+=0 # append 0 on the end
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123 | echo ${a[@]}
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124 | (( a[-1] += 42 ))
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125 | echo ${a[@]}
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126 |
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127 | ## STDOUT:
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128 | 0 2 3
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129 | -1 3
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130 | -2 2
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131 | -3
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132 | -4 0
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133 | -5
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134 | 0 2 30
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135 | 0 2 72
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136 | ## END
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137 | ## BUG mksh STDOUT:
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138 | 0 2 3
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139 | -1
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140 | -2
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141 | -3
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142 | -4
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143 | -5
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144 | 0 2 3 0
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145 | 0 2 3 42
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146 | ## END
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147 |
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148 | #### Negative index and sparse array
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149 | a=(0 1)
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150 | unset 'a[-1]' # remove last element
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151 | a+=(2 3)
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152 | echo ${a[0]} $((a[0]))
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153 | echo ${a[1]} $((a[1]))
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154 | echo ${a[2]} $((a[2]))
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155 | echo ${a[3]} $((a[3]))
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156 | ## STDOUT:
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157 | 0 0
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158 | 2 2
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159 | 3 3
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160 | 0
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161 | ## END
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162 | ## BUG mksh STDOUT:
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163 | 0 0
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164 | 1 1
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165 | 2 2
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166 | 3 3
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167 | ## END
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168 |
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169 | #### Length after unset
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170 | a=(0 1 2 3)
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171 | unset a[-1]
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172 | echo len=${#a[@]}
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173 | unset a[-1]
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174 | echo len=${#a[@]}
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175 | ## STDOUT:
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176 | len=3
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177 | len=2
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178 | ## END
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179 | ## BUG mksh STDOUT:
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180 | len=4
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181 | len=4
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182 | ## END
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183 |
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184 | #### Retrieve index that is a variable
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185 | a=(1 '2 3')
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186 | i=1
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187 | argv.py "${a[$i]}"
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188 | ## stdout: ['2 3']
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189 |
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190 | #### Retrieve index that is a variable without $
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191 | a=(1 '2 3')
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192 | i=5
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193 | argv.py "${a[i-4]}"
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194 | ## stdout: ['2 3']
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195 |
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196 | #### Retrieve index that is a command sub
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197 | a=(1 '2 3')
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198 | argv.py "${a[$(echo 1)]}"
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199 | ## stdout: ['2 3']
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200 |
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201 | #### Retrieve array indices with ${!a}
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202 | a=(1 '2 3')
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203 | argv.py "${!a[@]}"
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204 | ## stdout: ['0', '1']
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205 |
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206 | #### Retrieve sparse array indices with ${!a}
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207 | a=()
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208 | (( a[99]=1 ))
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209 | argv.py "${!a[@]}"
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210 | ## STDOUT:
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211 | ['99']
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212 | ## END
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213 |
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214 | #### ${!a[1]} is named ref in bash
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215 | # mksh ignores it
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216 | foo=bar
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217 | a=('1 2' foo '2 3')
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218 | argv.py "${!a[1]}"
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219 | ## status: 0
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220 | ## stdout: ['bar']
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221 | ## N-I mksh stdout: ['a[1]']
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222 |
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223 | #### ${!a} on array
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224 |
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225 | # bash gives empty string because it's like a[0]
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226 | # mksh gives the name of the variable with !. Very weird.
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227 |
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228 | a=(1 '2 3')
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229 | argv.py "${!a}"
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230 |
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231 | ## stdout: ['']
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232 | ## status: 0
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233 | ## BUG mksh stdout: ['a']
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234 | ## BUG mksh status: 0
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235 |
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236 | #### All elements unquoted
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237 | a=(1 '2 3')
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238 | argv.py ${a[@]}
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239 | ## stdout: ['1', '2', '3']
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240 |
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241 | #### All elements quoted
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242 | a=(1 '2 3')
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243 | argv.py "${a[@]}"
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244 | ## stdout: ['1', '2 3']
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245 |
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246 | #### $*
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247 | a=(1 '2 3')
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248 | argv.py ${a[*]}
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249 | ## stdout: ['1', '2', '3']
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250 |
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251 | #### "$*"
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252 | a=(1 '2 3')
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253 | argv.py "${a[*]}"
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254 | ## stdout: ['1 2 3']
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255 |
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256 | #### Interpolate array into array
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257 | a=(1 '2 3')
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258 | a=(0 "${a[@]}" '4 5')
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259 | argv.py "${a[@]}"
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260 | ## stdout: ['0', '1', '2 3', '4 5']
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261 |
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262 | #### Exporting array doesn't do anything, not even first element
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263 | # bash parses, but doesn't execute.
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264 | # mksh gives syntax error -- parses differently with 'export'
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265 | # osh no longer parses this statically.
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266 |
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267 | export PYTHONPATH
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268 |
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269 | PYTHONPATH=mystr # NOTE: in bash, this doesn't work afterward!
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270 | printenv.py PYTHONPATH
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271 |
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272 | PYTHONPATH=(myarray)
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273 | printenv.py PYTHONPATH
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274 |
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275 | PYTHONPATH=(a b c)
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276 | printenv.py PYTHONPATH
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277 |
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278 | ## status: 0
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279 | ## STDOUT:
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280 | mystr
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281 | None
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282 | None
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283 | ## END
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284 |
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285 | #### strict_array prevents exporting array
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286 |
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287 | shopt -s strict_array
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288 |
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289 | export PYTHONPATH
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290 | PYTHONPATH=(a b c)
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291 | printenv.py PYTHONPATH
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292 |
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293 | ## status: 1
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294 | ## STDOUT:
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295 | ## END
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296 |
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297 | ## N-I bash/mksh status: 0
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298 | ## N-I bash/mksh STDOUT:
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299 | None
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300 | ## END
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301 |
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302 | #### Arrays can't be used as env bindings
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303 | # Hm bash it treats it as a string!
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304 | A=a B=(b b) printenv.py A B
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305 | ## status: 2
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306 | ## stdout-json: ""
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307 | ## OK bash stdout-json: "a\n(b b)\n"
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308 | ## OK bash status: 0
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309 | ## OK mksh status: 1
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310 |
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311 | #### Set element
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312 | a=(1 '2 3')
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313 | a[0]=9
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314 | argv.py "${a[@]}"
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315 | ## stdout: ['9', '2 3']
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316 |
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317 | #### Set element with var ref
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318 | a=(1 '2 3')
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319 | i=0
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320 | a[$i]=9
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321 | argv.py "${a[@]}"
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322 | ## stdout: ['9', '2 3']
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323 |
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324 | #### Set element with array ref
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325 | # This makes parsing a little more complex. Anything can be inside [],
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326 | # including other [].
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327 | a=(1 '2 3')
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328 | i=(0 1)
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329 | a[${i[1]}]=9
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330 | argv.py "${a[@]}"
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331 | ## stdout: ['1', '9']
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332 |
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333 | #### Set array item to array
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334 | a=(1 2)
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335 | a[0]=(3 4)
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336 | echo "status=$?"
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337 | ## stdout-json: ""
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338 | ## status: 2
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339 | ## N-I mksh status: 1
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340 | ## BUG bash stdout: status=1
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341 | ## BUG bash status: 0
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342 |
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343 | #### Slice of array with [@]
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344 | # mksh doesn't support this syntax! It's a bash extension.
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345 | a=(1 2 3)
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346 | argv.py "${a[@]:1:2}"
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347 | ## stdout: ['2', '3']
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348 | ## N-I mksh status: 1
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349 | ## N-I mksh stdout-json: ""
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350 |
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351 | #### Negative slice begin
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352 | # mksh doesn't support this syntax! It's a bash extension.
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353 | # NOTE: for some reason -2) has to be in parens? Ah that's because it
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354 | # conflicts with :-! That's silly. You can also add a space.
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355 | a=(1 2 3 4 5)
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356 | argv.py "${a[@]:(-4)}"
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357 | ## stdout: ['2', '3', '4', '5']
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358 | ## N-I mksh status: 1
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359 | ## N-I mksh stdout-json: ""
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360 |
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361 | #### Negative slice length
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362 | a=(1 2 3 4 5)
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363 | argv.py "${a[@]: 1: -3}"
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364 | ## status: 1
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365 | ## stdout-json: ""
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366 |
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367 | #### Slice with arithmetic
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368 | a=(1 2 3)
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369 | i=5
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370 | argv.py "${a[@]:i-4:2}"
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371 | ## stdout: ['2', '3']
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372 | ## N-I mksh status: 1
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373 | ## N-I mksh stdout-json: ""
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374 |
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375 | #### Number of elements
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376 | a=(1 '2 3')
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377 | echo "${#a[@]}" ${#a[@]} # bug fix: also test without quotes
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378 | ## stdout: 2 2
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379 |
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380 | #### Length of an element
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381 | a=(1 '2 3')
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382 | echo "${#a[1]}"
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383 | ## stdout: 3
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384 |
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385 | #### Iteration
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386 | a=(1 '2 3')
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387 | for v in "${a[@]}"; do
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388 | echo $v
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389 | done
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390 | ## stdout-json: "1\n2 3\n"
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391 |
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392 | #### glob within array yields separate elements
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393 | touch _tmp/y.Y _tmp/yy.Y
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394 | a=(_tmp/*.Y)
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395 | argv.py "${a[@]}"
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396 | ## stdout: ['_tmp/y.Y', '_tmp/yy.Y']
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397 |
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398 | #### declare array and then append
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399 | declare -a array
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400 | array+=(a)
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401 | array+=(b c)
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402 | argv.py "${array[@]}"
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403 | ## stdout: ['a', 'b', 'c']
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404 |
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405 | #### Array syntax in wrong place
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406 | ls foo=(1 2)
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407 | ## status: 1
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408 | ## OK bash status: 2
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409 |
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410 | #### Single array with :-
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411 | # bash does EMPTY ELISION here, unless it's double quoted. mksh has
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412 | # more sane behavior. OSH is better.
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413 | single=('')
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414 | argv.py ${single[@]:-none} x "${single[@]:-none}"
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415 | ## OK osh stdout: ['x', '']
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416 | ## OK bash stdout: ['none', 'x', '']
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417 | ## OK mksh stdout: ['none', 'x', 'none']
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418 |
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419 | #### Stripping a whole array unquoted
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420 | # Problem: it joins it first.
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421 | files=('foo.c' 'sp ace.h' 'bar.c')
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422 | argv.py ${files[@]%.c}
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423 | ## status: 0
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424 | ## stdout: ['foo', 'sp', 'ace.h', 'bar']
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425 | ## N-I mksh status: 1
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426 | ## N-I mksh stdout-json: ""
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427 |
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428 | #### Stripping a whole array quoted
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429 | files=('foo.c' 'sp ace.h' 'bar.c')
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430 | argv.py "${files[@]%.c}"
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431 | ## status: 0
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432 | ## stdout: ['foo', 'sp ace.h', 'bar']
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433 | ## N-I mksh status: 1
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434 | ## N-I mksh stdout-json: ""
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435 |
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436 | #### Multiple subscripts not allowed
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437 | # NOTE: bash 4.3 had a bug where it ignored the bad subscript, but now it is
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438 | # fixed.
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439 | a=('123' '456')
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440 | argv.py "${a[0]}" "${a[0][0]}"
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441 | ## stdout-json: ""
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442 | ## status: 2
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443 | ## OK bash/mksh status: 1
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444 |
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445 | #### Length op, index op, then transform op is not allowed
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446 | a=('123' '456')
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447 | echo "${#a[0]}" "${#a[0]/1/xxx}"
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448 | ## stdout-json: ""
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449 | ## status: 2
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450 | ## OK bash/mksh status: 1
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451 |
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452 | #### ${mystr[@]} and ${mystr[*]} are no-ops
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453 | s='abc'
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454 | echo ${s[@]}
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455 | echo ${s[*]}
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456 | ## STDOUT:
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457 | abc
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458 | abc
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459 | ## END
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460 |
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461 | #### ${mystr[@]} and ${mystr[*]} disallowed with strict_array
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462 |
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463 | $SH -c 'shopt -s strict_array; s="abc"; echo ${s[@]}'
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464 | echo status=$?
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465 |
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466 | $SH -c 'shopt -s strict_array; s="abc"; echo ${s[*]}'
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467 | echo status=$?
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468 |
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469 | ## status: 0
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470 | ## STDOUT:
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471 | status=1
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472 | status=1
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473 | ## END
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474 | ## N-I bash/mksh STDOUT:
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475 | abc
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476 | status=0
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477 | abc
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478 | status=0
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479 | ## END
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480 |
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481 | #### Create a "user" array out of the argv array
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482 | set -- 'a b' 'c'
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483 | array1=('x y' 'z')
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484 | array2=("$@")
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485 | argv.py "${array1[@]}" "${array2[@]}"
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486 | ## stdout: ['x y', 'z', 'a b', 'c']
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487 |
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488 | #### Tilde expansion within array
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489 | HOME=/home/bob
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490 | a=(~/src ~/git)
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491 | echo "${a[@]}"
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492 | ## stdout: /home/bob/src /home/bob/git
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493 |
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494 | #### Brace Expansion within Array
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495 | a=(-{a,b} {c,d}-)
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496 | echo "${a[@]}"
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497 | ## stdout: -a -b c- d-
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498 |
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499 | #### array default
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500 | default=('1 2' '3')
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501 | argv.py "${undef[@]:-${default[@]}}"
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502 | ## stdout: ['1 2', '3']
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503 |
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504 | #### Singleton Array Copy and Assign. OSH can't index strings with ints
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505 | a=( '12 3' )
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506 | b=( "${a[@]}" )
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507 | c="${a[@]}" # This decays it to a string
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508 | d=${a[*]} # This decays it to a string
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509 | echo ${#a[0]} ${#b[0]}
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510 | echo ${#a[@]} ${#b[@]}
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511 |
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512 | # osh is intentionally stricter, and these fail.
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513 | echo ${#c[0]} ${#d[0]}
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514 | echo ${#c[@]} ${#d[@]}
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515 |
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516 | ## status: 1
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517 | ## STDOUT:
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518 | 4 4
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519 | 1 1
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520 | ## END
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521 | ## OK bash/mksh status: 0
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522 | ## OK bash/mksh STDOUT:
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523 | 4 4
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524 | 1 1
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525 | 4 4
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526 | 1 1
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527 | ## END
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528 |
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529 | #### declare -a / local -a is empty array
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530 | declare -a myarray
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531 | argv.py "${myarray[@]}"
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532 | myarray+=('x')
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533 | argv.py "${myarray[@]}"
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534 |
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535 | f() {
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536 | local -a myarray
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537 | argv.py "${myarray[@]}"
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538 | myarray+=('x')
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539 | argv.py "${myarray[@]}"
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540 | }
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541 | f
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542 | ## STDOUT:
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543 | []
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544 | ['x']
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545 | []
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546 | ['x']
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547 | ## END
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548 |
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549 | #### Create sparse array
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550 | a=()
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551 | (( a[99]=1 )) # osh doesn't parse index assignment outside arithmetic yet
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552 | echo len=${#a[@]}
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553 | argv.py "${a[@]}"
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554 | echo "unset=${a[33]}"
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555 | echo len-of-unset=${#a[33]}
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556 | ## STDOUT:
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557 | len=1
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558 | ['1']
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559 | unset=
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560 | len-of-unset=0
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561 | ## END
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562 |
|
563 | #### Create sparse array implicitly
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564 | (( a[99]=1 ))
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565 | echo len=${#a[@]}
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566 | argv.py "${a[@]}"
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567 | echo "unset=${a[33]}"
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568 | echo len-of-unset=${#a[33]}
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569 | ## STDOUT:
|
570 | len=1
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571 | ['1']
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572 | unset=
|
573 | len-of-unset=0
|
574 | ## END
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575 |
|
576 | #### Append sparse arrays
|
577 | a=()
|
578 | (( a[99]=1 ))
|
579 | b=()
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580 | (( b[33]=2 ))
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581 | (( b[66]=3 ))
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582 | a+=( "${b[@]}" )
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583 | argv.py "${a[@]}"
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584 | argv.py "${a[99]}" "${a[100]}" "${a[101]}"
|
585 | ## STDOUT:
|
586 | ['1', '2', '3']
|
587 | ['1', '2', '3']
|
588 | ## END
|
589 |
|
590 | #### Slice of sparse array with [@]
|
591 | # mksh doesn't support this syntax! It's a bash extension.
|
592 | (( a[33]=1 ))
|
593 | (( a[66]=2 ))
|
594 | (( a[99]=2 ))
|
595 | argv.py "${a[@]:15:2}"
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596 | ## stdout: ['1', '2']
|
597 | ## N-I mksh status: 1
|
598 | ## N-I mksh stdout-json: ""
|
599 |
|
600 | #### Using an array itself as the index on LHS
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601 | shopt -u strict_arith
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602 | a[a]=42
|
603 | a[a]=99
|
604 | argv.py "${a[@]}" "${a[0]}" "${a[42]}" "${a[99]}"
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605 |
|
606 | ## status: 0
|
607 | ## STDOUT:
|
608 | ['42', '99', '42', '99', '']
|
609 | ## END
|
610 |
|
611 | #### Using an array itself as the index on RHS
|
612 | shopt -u strict_arith
|
613 | a=(1 2 3)
|
614 | (( x = a[a] ))
|
615 | echo $x
|
616 | ## status: 0
|
617 | ## STDOUT:
|
618 | 2
|
619 | ## END
|
620 |
|
621 | #### a[$x$y] on LHS and RHS
|
622 | x=1
|
623 | y=2
|
624 | a[$x$y]=foo
|
625 |
|
626 | # not allowed by OSH parsing
|
627 | #echo ${a[$x$y]}
|
628 |
|
629 | echo ${a[12]}
|
630 | echo ${#a[@]}
|
631 |
|
632 | ## STDOUT:
|
633 | foo
|
634 | 1
|
635 | ## END
|
636 |
|
637 |
|
638 | #### Dynamic parsing of LHS a[$code]=value
|
639 |
|
640 | declare -a array
|
641 | array[x=1]='one'
|
642 |
|
643 | code='y=2'
|
644 | #code='1+2' # doesn't work either
|
645 | array[$code]='two'
|
646 |
|
647 | argv.py "${array[@]}"
|
648 | echo x=$x
|
649 | echo y=$y
|
650 |
|
651 | ## STDOUT:
|
652 | ['one', 'two']
|
653 | x=1
|
654 | y=2
|
655 | ## END
|
656 | ## N-I dash stdout-json: ""
|
657 | ## N-I dash status: 2
|
658 |
|
659 | #### Dynamic parsing of RHS ${a[$code]}
|
660 | declare -a array
|
661 | array=(zero one two three)
|
662 |
|
663 | echo ${array[1+2]}
|
664 |
|
665 | code='1+2'
|
666 | echo ${array[$code]}
|
667 |
|
668 | ## STDOUT:
|
669 | three
|
670 | three
|
671 | ## END
|
672 |
|
673 | # it still dynamically parses
|
674 |
|
675 | ## OK zsh STDOUT:
|
676 | two
|
677 | two
|
678 | ## END
|