dtyqflrr775518 2019-07-12 09:33 采纳率: 100%
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如何在golang中删除字符串中的最后一个字母?

假设我有一个字符串名为 varString。

varString := "Bob,Mark,"

问: 如何从字符串中删除最后一个字母? 在上面的例子中就是指第二个逗号。

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  • doubingqi5829 2019-07-12 11:03
    关注

    How to remove the last letter from the string?


    In Go, character strings are UTF-8 encoded. Unicode UTF-8 is a variable-length character encoding which uses one to four bytes per Unicode character (code point).

    For example,

    package main
    
    import (
        "fmt"
        "unicode/utf8"
    )
    
    func trimLastChar(s string) string {
        r, size := utf8.DecodeLastRuneInString(s)
        if r == utf8.RuneError && (size == 0 || size == 1) {
            size = 0
        }
        return s[:len(s)-size]
    }
    
    func main() {
        s := "Bob,Mark,"
        fmt.Println(s)
        s = trimLastChar(s)
        fmt.Println(s)
    }
    

    Playground: https://play.golang.org/p/qyVYrjmBoVc

    Output:

    Bob,Mark,
    Bob,Mark
    
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