concat variable in regexp pattern
javascript, regex
Solution
You need to build your regex as a string and pass it to the `RegExp` constructor:
var regexString = '\\d{' + number + '}';
var regex = new RegExp(regexString);
var p = str.match(regex);
Notice that when building a regex via a string, you need to add some extra escape characters to escape the string as well as the regex.
Problem
I use this regex ``` str = "asd34rgr888gfd98"; var p = str.match(/\d{2}/); alert(p[0]); ``` butI not understood how can use variable as quantificator, that is how write this: ``` var number = 2; var p = str.match(/\d{number}/); ``` P.S. I see this page JavaScript regex pattern concatenate with variable but not understood how use example from these posts, in my case.