1	# spec/ysh-methods
2
3	## our_shell: ysh
4	## oils_failures_allowed: 0
5
6	#### Str->startswith
7	= "abc"->startswith("")
8	= "abc"->startswith("a")
9	= "abc"->startswith("z")
10	## status: 0
11	## STDOUT:
12	(Bool) True
13	(Bool) True
14	(Bool) False
15	## END
16
17	#### Str->startswith, no args
18	= "abc"->startswith()
19	## status: 3
20
21	#### Str->startswith, too many args
22	= "abc"->startswith("extra", "arg")
23	## status: 3
24
25	#### Missing method (Str->doesNotExist())
26	= "abc"->doesNotExist()
27	## status: 3
28
29	#### Dict->keys()
30	var en2fr = {}
31	setvar en2fr["hello"] = "bonjour"
32	setvar en2fr["friend"] = "ami"
33	setvar en2fr["cat"] = "chat"
34	= en2fr->keys()
35	## status: 0
36	## STDOUT:
37	(List) ['hello', 'friend', 'cat']
38	## END
39
40	#### Seperation of -> attr and () calling
41	const check = "abc"->startswith
42	= check("a")
43	## status: 0
44	## STDOUT:
45	(Bool) True
46	## END
47
48	#### Bound methods, receiver value/reference semantics
49	var is_a_ref = { "foo": "bar" }
50	const f = is_a_ref->keys
51	= f()
52	setvar is_a_ref["baz"] = 42
53	= f()
54
55	var is_a_val = "abc"
56	const g = is_a_val->startswith
57	= g("a")
58	setvar is_a_val = "xyz"
59	= g("a")
60	## status: 0
61	## STDOUT:
62	(List) ['foo']
63	(List) ['foo', 'baz']
64	(Bool) True
65	(Bool) True
66	## END