-
Notifications
You must be signed in to change notification settings - Fork 103
/
collection.go
60 lines (54 loc) · 1.27 KB
/
collection.go
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
package lib
// Index returns the first index of the target string t, or -1 if no match is found
func Index(vs []string, t string) int {
for i, v := range vs {
if v == t {
return i
}
}
return -1
}
// IndexUint returns the first index of the target uint t, or -1 if not match is found.
func IndexUint(vs []uint, t uint) int {
for i, v := range vs {
if v == t {
return i
}
}
return -1
}
// Include returns true if the target string t is in the slice.
func Include(vs []string, t string) bool {
return Index(vs, t) >= 0
}
// Filter returns a new slice containing all strings in the slice
// that satisfy the predicate f.
func Filter(vs []string, f func(string) bool) []string {
vsf := make([]string, 0)
for _, v := range vs {
if f(v) {
vsf = append(vsf, v)
}
}
return vsf
}
// Map returns a new slice containing the results of applying
// the function f to each string in the original slice.
func Map(vs []string, f func(string) string) []string {
vsm := make([]string, len(vs))
for i, v := range vs {
vsm[i] = f(v)
}
return vsm
}
// DeleteEmpty returns a new slice containing all non-empty strings
// in the original slice.
func DeleteEmpty(s []string) []string {
var r []string
for _, str := range s {
if str != "" {
r = append(r, str)
}
}
return r
}