Finds substring between

substrBetween.js

RegExp.escape = function(s) {
    return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
};
 
String.prototype.substrBetween = function(left, right, ignoreCase){
    left = RegExp.escape(left);
    right = RegExp.escape(right);
    ignoreCase = (ignoreCase == true) ? 'i' : '';
    var reg = new RegExp(left+"(.*?)"+right,'g' + ignoreCase);
 
    return reg.exec(this);
}
 
// ========= Example of usage =============
 
var s = "kopalniaPoszukiwanaUranu";
console.log(s.substrBetween('kopalnia','uranu',true));