Is it possible to loop through a RegEx range using Javascript
I thought to myself: is it possible to iterate over a RegEx range in JavaScript. Let's say for example I wanted to skip every letter of the alphabet, I could do something like this:
var theAlphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
[].forEach.call(theAlphabet, function (a) {
console.log(a);
});
Note that I know I could do this using an .split()
in line and then a loop, but anyway I was wondering if I could use a RegEx range instead of a line, something like this (I know it doesn't work )
var reg = new RegExp(/A-Z/), result;
while((result = reg.exec(reg)) !== null) {
console.log(result); // ["A-Z", index: 1, input: "/A-Z/"] - Not correct I realise
}
This is just what I was interested in. If it's a stupid question, say so and I'll delete it.
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The question is rather unclear, but I think you are asking if you can replace split with RegEx. You can do this, of course, but two things come to mind.
You keep calling a new regex for each letter, which will have some overhead. If you do it like in this link: http://jsperf.com/regex-vs-split/2 its clearly better than split. This may not be the same with every language, but it seems to be in JS.
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