CODEWITHSUNDEEP
javascriptregex
jimx
jimx

Reputation: 57

Convert Javascript Regex Result to String(?)

I extracted a string inside a parenthesis using a simple RegExp expression. I'm trying to split the result to an array.

But I am getting a "Cannot read property 'split' of null" ERROR. Which is weird because vrb1 returns (a, b).

I already tried converting vrb1 to string with toString() but It didn't work.

Could this error be because of RegExp match result? Your help is very much appreciated.

str = sample(a, b);

var regex = new RegExp("[\(]([^\)])+[\)]","g");
var vrb1 = str.match(regex);
var tmp = vrb1.split(",");
return tmp;

Upvotes: 0

Views: 641

Answers (2)

gurvinder372
gurvinder372

Reputation: 68443

match will return null if no result is found.

You need simply check for null as well.

Replace 

var tmp = vrb1.split(",");

with

var tmp = vrb1 || [];

This will return an empty array if no result is found.

Edit

Looks like you are further splitting the result by comma, then try

var tmp = vrb1 ? vrb1[0].split(",") : [];

or since there are multiple results (g in your regex)

var tmp = vrb1 ? vrb1.join(",").split(",") : [];

Upvotes: 2

Marty
Marty

Reputation: 39466

match returns an array, not a string.

Return value

array

An Array containing the entire match result and any parentheses-captured matched results, or null if there were no matches.

In your case you want something like:

if (vrb1 !== null) {
    var tmp = vrb1[0].split(',');
}

Upvotes: 3

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