数组拆分时如何包含分隔符？

Question

我想用正则表达式拆分一些字符串。但是我无法得到我想的结果。听说 javascript 不支持lookbehind。

var str = "always on the go? if yes, slip-on this dress that comes with u- neck, long sleeves and loose fit. wear with slacks and beanie to finish the ensemble.↵↵- u-neck↵- long sleeves↵- loose fit↵- knee hemline↵- plain print"

val.split(/(?:([\.,?;\n])\s?)/gi)

我现在的结果是这样的

["always on the go", "?", "if yes", ",", "slip-on this dress that comes with u-neck", ",", "long sleeves and loose fit", ".", "wear with slacks and beanie to finish the ensemble", ".", "", " ", "- u-neck", " ", "- long sleeves", " ", "- loose fit", " ", "- knee hemline", " ", "- plain print"]

但我希望我的结果是这样的

array[0] = "always on the go?";
array[1] = "if yes,";
...
...
...
array[n] = '↵'
array[n] = '↵'
array[n] = '- u-neck'
...
...

我该怎么做？

Answer 1

试试这个正则表达式，它会让你的 ,?.在句末。

var str= "always on the go? if yes, slip-on this dress that comes with u-         neck,long sleeves and loose fit. wear with slacks and beanie to finish the ensemble.↵↵- u-neck↵- long sleeves↵- loose fit↵- knee hemline↵- plain print".

var arr= str. split(/([^\.,?\n]+[\.,?\n])/gi);

Answer 2

我能想到的唯一方法是编写自己的原型

String.prototype.splitKeep = function(arr){
    if (!(arr instanceof Array)) throw('input array please');
    var value = this.toString();
    for (var i = 0; i < arr.length; i++){
        value = value.split(arr[i]).join(arr[i] + ":split:").trim();
    }
    value = value.split(":split:");
    //remove all newlines with characters
    for (var i = 0; i < value.length; i++){
        var item = value[i];
        if (item[item.length-1] === '\n' && item.length > 1){
            value[i] = item.substring(0, item.length-1);
        }
    }
    return value;
}

并使用这个

str.splitKeep(['.', ',', '?', ';', '\n'])

数组拆分时如何包含分隔符？

How to include separator when array split?

javascript

regex

split