How to construct a regular expression pattern from string

Question

I am using regular expression in Node.JS

var Regex = require("regex");
var regex = new Regex(/(a|b)*abb/);
regex.test("abb");   // true 
regex.test("cabb");  // false

In this case, the pattern is

`/(a|b)*abb/`

var regex = new Regex(/(a|b)*abb/); is correct

var regex = new Regex('(a|b)*abb'); is error

Now I have a string '(a|b)*abb'. How do I construct a regular expression pattern from this string.

Tushar · Accepted Answer · 2016-04-15 14:43:50Z

4

Both are incorrect.

The correct way is to use the RegExp constructor.

var regex = new RegExp('(a|b)*abb');

answered Apr 15, 2016 at 14:43

Tushar

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