1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
// Named str to avoid name collisions with the Erlang string module.
// Will rename later once we have namespaces for modules.
import expect
import iodata
import list
pub external fn length(String) -> Int = "string" "length"
test length {
length("ß↑e̊")
|> expect:equal(_, 3)
length("Gleam")
|> expect:equal(_, 5)
length("")
|> expect:equal(_, 0)
}
pub external fn lowercase(String) -> String = "string" "lowercase"
test lowercase {
lowercase("Gleam")
|> expect:equal(_, "gleam")
}
pub external fn uppercase(String) -> String = "string" "uppercase"
test uppercase {
uppercase("Gleam")
|> expect:equal(_, "GLEAM")
}
pub fn reverse(string) {
string
|> iodata:new
|> iodata:reverse
|> iodata:to_string
}
test reverse {
reverse("Gleam")
|> expect:equal(_, "maelG")
}
pub fn split(string, on) {
string
|> iodata:new
|> iodata:split(_, on)
|> list:map(_, iodata:to_string)
}
test split {
"Gleam,Erlang,Elixir"
|> split(_, ",")
|> expect:equal(_, ["Gleam", "Erlang", "Elixir"])
"Gleam, Erlang,Elixir"
|> split(_, ", ")
|> expect:equal(_, ["Gleam", "Erlang,Elixir"])
}
pub fn replace(string, pattern, with) {
string
|> iodata:new
|> iodata:replace(_, pattern, with)
|> iodata:to_string
}
test replace {
"Gleam,Erlang,Elixir"
|> replace(_, ",", "++")
|> expect:equal(_, "Gleam++Erlang++Elixir")
}
pub external fn from_int(Int) -> String = "erlang" "integer_to_binary"
test from_int {
123
|> from_int
|> expect:equal(_, "123")
-123
|> from_int
|> expect:equal(_, "-123")
0123
|> from_int
|> expect:equal(_, "123")
}
pub external fn base_from_int(Int, Int) -> String = "erlang" "integer_to_binary"
test base_from_int {
100
|> base_from_int(_, 16)
|> expect:equal(_, "64")
-100
|> base_from_int(_, 16)
|> expect:equal(_, "-64")
}
pub fn from_float(f) {
f
|> iodata:from_float
|> iodata:to_string
}
test from_float {
123.0
|> from_float
|> expect:equal(_, "123.0")
-8.1
|> from_float
|> expect:equal(_, "-8.1")
}
|
