javascript split string multiple ways

Question

I am looking for a way to split a sting like "StringBuilder SB = new StringBuilder();" into an array with seperate words, symbols and spaces

var string = "StringBuilder SB = new StringBuilder();";
var array = string.split(...);

output should be like:

array = ["StringBuilder", " ", "SB", " ", "=", " ", "new", " ", "StringBuilder", "(", ")", ";"];

developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… — SteamDev
– SteamDev, Commented Jun 27, 2016 at 21:39

vp_arth · Accepted Answer · 2016-06-27 22:03:06Z

4

Not sure this applies all your needs:

"StringBuilder SB = new StringBuilder();".match(/(\s+|\w+|.)/g);
["StringBuilder", " ", "SB", " ", "=", " ", "new", " ", "StringBuilder", "(", ")", ";"]

edited Jun 27, 2016 at 22:03

answered Jun 27, 2016 at 21:49

vp_arth

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2 Comments

Drew Over a year ago

So this works simply by copy pasting your snippet, but I am curious how "/(\s|\w+|.)/g" this does what it does?

vp_arth Over a year ago

It just matches tokens by alternation. One of them (| separated) should be matched. and if nothing matched last one . means "every single character". So, we split input by spaces(\s+), words(\w+) and other characters(.).

Tarwirdur Turon · Accepted Answer · 2016-06-27 21:53:04Z

easy-customizable solution:

function mySplit(str) {
    function isChar(ch) {
        return ch.match(/[a-z]/i);
    }

    var i;
    var result = [];
    var buffer = "";
    var current;
    var onWord = false;

    for (i = 0; i < str.length; ++i) {
        current = str[i];
        if (isChar(current)) {
            buffer += current;
            onWord = true;
        } else {
            if (onWord) {
                result.push(buffer);
            }
            result.push(current);
            onWord = false;
        }
    }
    if(onWord) {
        result.push(buffer);
    }
    return result;
}

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