utils – k8s.io/utils/strings/slices Index | Examples | Files

package slices

import "k8s.io/utils/strings/slices"

Package slices defines various functions useful with slices of string type. The goal is to be as close as possible to https://github.com/golang/go/issues/45955. Ideal would be if we can just replace "stringslices" if the "slices" package becomes standard.

Example

Code: 

{
	a := []string{
		"10.0.0.0", "FOO", "1000::1", "fd80::4%eth0", "BAR", "192.168.1.300",
		"172.12.0.1", "fc00::5000",
	}
	v := func(s string) bool { return net.ParseIP(s) == nil }
	if notIP := Filter(nil, a, v); len(notIP) > 0 {
		fmt.Println("Invalid", notIP)
	}
	fmt.Println(Filter(nil, a, utilnet.IsIPv6String))
	// Output:
	// Invalid [FOO fd80::4%eth0 BAR 192.168.1.300]
	// [1000::1 fc00::5000]
}

Output:

Invalid [FOO fd80::4%eth0 BAR 192.168.1.300]
[1000::1 fc00::5000]
Example (Regexp)

Code: 

{
	a := []string{
		"10.0.0.0", "FOO", "1000::1", "fd80::4%eth0", "BAR", "192.168.1.300",
		"172.12.0.1", "fc00::5000",
	}
	re := regexp.MustCompile("^[A-Z]+$")
	fmt.Println(Filter(nil, a, re.MatchString))
	// Output: [FOO BAR]
}

Output:

[FOO BAR]

Index

Examples

Functions

func Clone 

func Clone(s []string) []string

Clone returns a new clone of s.

func Contains 

func Contains(s []string, v string) bool

Contains reports whether v is present in s.

func Equal 

func Equal(s1, s2 []string) bool

Equal reports whether two slices are equal: the same length and all elements equal. If the lengths are different, Equal returns false. Otherwise, the elements are compared in index order, and the comparison stops at the first unequal pair.

func Filter 

func Filter(d, s []string, keep func(string) bool) []string

Filter appends to d each element e of s for which keep(e) returns true. It returns the modified d. d may be s[:0], in which case the kept elements will be stored in the same slice. if the slices overlap in some other way, the results are unspecified. To create a new slice with the filtered results, pass nil for d.

Example (Empty)

Code: 

{
	s := []string{"FOO", "", "", "BAR", "fd80::8888", ""}
	fmt.Println(Filter(nil, s, func(s string) bool { return s != "" }))
	// Output: [FOO BAR fd80::8888]
}

Output:

[FOO BAR fd80::8888]

func Index 

func Index(s []string, v string) int

Index returns the index of the first occurrence of v in s, or -1 if not present.

Source Files

slices.go

Version
v0.0.0-20250321185631-1f6e0b77f77e (latest)
Published
Mar 21, 2025
Platform
linux/amd64
Last checked
1 month ago –

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