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
|
// https://github.com/gleam-lang/stdlib/raw/main/src/gleam/string.gleam
//// Strings in Gleam are UTF-8 binaries. They can be written in your code a
//// text surrounded by `"double quotes"`.
import gleam/string_builder
import gleam/dynamic.{Dynamic}
import gleam/iterator
import gleam/list
import gleam/order
import gleam/result
pub type String =
String
/// A UtfCodepoint is the integer representation of a valid UTF codepoint
pub type UtfCodepoint =
UtfCodepoint
/// Determine if a string is empty.
///
/// ## Examples
///
/// > is_empty("")
/// True
///
/// > is_empty("the world")
/// False
///
pub fn is_empty(str: String) -> Bool {
str == ""
}
/// Get the number of grapheme clusters in a given string.
///
/// This function has to iterate across the whole string to count the number of
/// graphemes, so it runs in linear time.
///
/// ## Examples
///
/// > length("Gleam")
/// 5
///
/// > length("ß↑e̊")
/// 3
///
/// > length("")
/// 0
///
pub external fn length(String) -> Int =
"string" "length"
///
/// Reverse a string.
///
/// This function has to iterate across the whole string so it runs in linear
/// time.
///
/// ## Examples
///
/// > reverse("stressed")
/// "desserts"
///
pub fn reverse(string: String) -> String {
string
|> string_builder.from_string
|> string_builder.reverse
|> string_builder.to_string
}
|
