【转】go里面字符串转成 字节slice, 字节slice转成字符串 - Go语言中文社区

【转】go里面字符串转成 字节slice, 字节slice转成字符串


原文: https://yourbasic.org/golang/convert-string-to-byte-slice/#convert-string-to-bytes

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Basics

When you convert between a string and a byte slice (array), you get a brand new slice that contains the same bytes as the string, and vice versa.

  • The conversion doesn’t change the data;
  • the only difference is that strings are immutable, while byte slices can be modified.

If you need to manipulate the characters (runes) of a string, you may want to convert the string to a rune slice instead. See Convert between rune array/slice and string.

Convert string to bytes

When you convert a string to a byte slice, you get a new slice that contains the same bytes as the string.

b := []byte("ABC€")
fmt.Println(b) // [65 66 67 226 130 172]

Note that the character  is encoded in UTF-8 using 3 bytes. See the Go rune articlefor more on UTF-8 encoding of Unicode code points.

Convert bytes to string

When you convert a slice of bytes to a string, you get a new string that contains the same bytes as the slice.

s := string([]byte{65, 66, 67, 226, 130, 172})
fmt.Println(s) // ABC€

Performance

These conversions create a new slice or string, and therefore have time complexityproportional to the number of bytes that are processed.

More efficient alternative

In some cases, you might be able to use a string builder, which can concatenate strings without redundant copying:

转载于:https://www.cnblogs.com/oxspirt/p/11279077.html

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原文链接:https://blog.csdn.net/weixin_30614587/article/details/101926852
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  • 发表于 2020-06-27 23:15:14
  • 阅读 ( 2451 )
  • 分类:Go

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