Build a dynamic regex with a variable
      by sij /
      
    
    I needed to build a dynamic regex, which consists of a variable.
var decimal_separator = ".";
var regex = new RegExp("[0-9]|\\" + decimal_separator);
    I needed to build a dynamic regex, which consists of a variable.
var decimal_separator = ".";
var regex = new RegExp("[0-9]|\\" + decimal_separator);