我如何分裂一个字符串与多个分隔符在JavaScript?

我试图拆分逗号和空格,但AFAIK JavaScript的split()函数只支持一个分隔符。


当前回答

我使用regexp:

str =  'Write a program that extracts from a given text all palindromes, e.g. "ABBA", "lamal", "exe".';

var strNew = str.match(/\w+/g);

// Output: ["Write", "a", "program", "that", "extracts", "from", "a", "given", "text", "all", "palindromes", "e", "g", "ABBA", "lamal", "exe"]

其他回答

我用缩减和过滤解决了这个问题。它可能不是最易读的解决方案,也不是最快的,在现实生活中,我可能会在这里使用aaron的答案,但写起来很有趣。

[' ','_','-','.',',',':','@'].reduce(
(segs, sep) => segs.reduce(
(out, seg) => out.concat(seg.split(sep)), []), 
['E-mail Address: user@domain.com, Phone Number: +1-800-555-0011']
).filter(x => x)

或作为一个函数:

function msplit(str, seps) {
  return seps.reduce((segs, sep) => segs.reduce(
    (out, seg) => out.concat(seg.split(sep)), []
  ), [str]).filter(x => x);
}

这将输出:

['E','mail','Address','user','domain','com','0','Phone','Number','+1','800','555','0011']

如果没有最后的过滤器,你将在数组中得到空字符串,其中两个不同的分隔符彼此相邻。

我使用regexp:

str =  'Write a program that extracts from a given text all palindromes, e.g. "ABBA", "lamal", "exe".';

var strNew = str.match(/\w+/g);

// Output: ["Write", "a", "program", "that", "extracts", "from", "a", "given", "text", "all", "palindromes", "e", "g", "ABBA", "lamal", "exe"]

通过。com/或。net/分割URL

url.split(/\.com\/|\.net\//)

棘手的方法:

var s = "dasdnk asd, (naks) :d skldma";
var a = s.replace('(',' ').replace(')',' ').replace(',',' ').split(' ');
console.log(a);//["dasdnk", "asd", "naks", ":d", "skldma"]

我将为这样的函数提供一个经典的实现。代码可以在几乎所有版本的JavaScript中运行,并且在某种程度上是最优的。

它不使用正则表达式,这很难维护 它没有使用JavaScript的新特性 它不使用需要更多计算机内存的多次.split() .join()调用

只是纯代码:

var text = "Create a function, that will return an array (of string), with the words inside the text";

println(getWords(text));

function getWords(text)
{
    let startWord = -1;
    let ar = [];

    for(let i = 0; i <= text.length; i++)
    {
        let c = i < text.length ? text[i] : " ";

        if (!isSeparator(c) && startWord < 0)
        {
            startWord = i;
        }

        if (isSeparator(c) && startWord >= 0)
        {
            let word = text.substring(startWord, i);
            ar.push(word);

            startWord = -1;
        }
    }

    return ar;
}

function isSeparator(c)
{
    var separators = [" ", "\t", "\n", "\r", ",", ";", ".", "!", "?", "(", ")"];
    return separators.includes(c);
}

你可以看到代码在playground中运行: https://codeguppy.com/code.html?IJI0E4OGnkyTZnoszAzf