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52 lines
1.7 KiB
Go
52 lines
1.7 KiB
Go
// The standard library's `strings` package provides many
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// useful string-related functions. Here are some examples
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// to give you a sense of the package.
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package main
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import (
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"fmt"
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s "strings"
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)
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// We alias `fmt.Println` to a shorter name as we'll use
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// it a lot below.
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var p = fmt.Println
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func main() {
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// Here's a sample of the functions available in
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// `strings`. Since these are functions from the
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// package, not methods on the string object itself,
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// we need pass the string in question as the first
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// argument to the function. You can find more
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// functions in the [`strings`](http://golang.org/pkg/strings/)
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// package docs.
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p("Contains: ", s.Contains("test", "es"))
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p("Count: ", s.Count("test", "t"))
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p("HasPrefix: ", s.HasPrefix("test", "te"))
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p("HasSuffix: ", s.HasSuffix("test", "st"))
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p("Index: ", s.Index("test", "e"))
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p("Join: ", s.Join([]string{"a", "b"}, "-"))
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p("Repeat: ", s.Repeat("a", 5))
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p("Replace: ", s.Replace("foo", "o", "0", -1))
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p("Replace: ", s.Replace("foo", "o", "0", 1))
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p("Split: ", s.Split("a-b-c-d-e", "-"))
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p("ToLower: ", s.ToLower("TEST"))
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p("ToUpper: ", s.ToUpper("test"))
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p()
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// Not part of `strings`, but worth mentioning here, are
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// the mechanisms for getting the length of a string in
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// bytes and getting a byte by index.
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p("Len: ", len("hello"))
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p("Char:", "hello"[1])
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}
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// Note that `len` and indexing above work at the byte level.
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// Go uses UTF-8 encoded strings, so this is often useful
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// as-is. If you're working with potentially multi-byte
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// characters you'll want to use encoding-aware operations.
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// See [strings, bytes, runes and characters in Go](https://blog.golang.org/strings)
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// for more information.
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