仅在分隔符的前n次出现时拆分字符串 [英] Split a string only the at the first n occurrences of a delimiter

问题描述

我想仅在分隔符的前n次出现时拆分字符串。我知道，我可以使用循环将它们添加到一起，但是没有更直接的方法吗？

I'd like to split a string only the at the first n occurrences of a delimiter. I know, I could add them together using a loop, but isn't there a more straight forward approach?

var string = 'Split this, but not this';    
var result = new Array('Split', 'this,', 'but not this');

推荐答案

根据 MDN ：

string.split(separator, limit);

更新：

var string = 'Split this, but not this',
    arr = string.split(' '),
    result = arr.slice(0,2);

result.push(arr.slice(2).join(' ')); // ["Split", "this,", "but not this"]

更新版本2（一个切片更短）：

Update version 2 (one slice shorter):

var string = 'Split this, but not this',
    arr = string.split(' '),
    result = arr.splice(0,2);

result.push(arr.join(' ')); // result is ["Split", "this,", "but not this"]

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