Find a string in a string

Question

How would I write an if statement that alerts when the var MyString is not in the var URL?

  var URL = "http://test.mysite.com/about/";
  var MyString = "mysite.com";

Compare the `indexOf` the word to `-1`. – elclanrs Aug 06 '13 at 00:03 — elclanrs, Aug 06 '13 at 00:03
Duplicate of http://stackoverflow.com/q/5296268/684368 – Smern Aug 06 '13 at 00:05 — Smern, Aug 06 '13 at 00:05

score 4 · Accepted Answer · answered Aug 06 '13 at 00:04

4

if (URL.indexOf(MyString) === -1) {
    alert('Not found!');
}

answered Aug 06 '13 at 00:04

Andrew Clark

Derek 朕會功夫 · Answer 2 · 2013-08-06T00:41:28.183

0

if(URL.indexOf(MyString) == -1) alert("Not found");

edited Aug 06 '13 at 00:41

answered Aug 06 '13 at 00:03

I have two notes: 1) treating string literal as regular expression is not the same as checking if string is found withing a string (see especially special characters in pattern string), 2) the comparisons you are using are _evil_ (see more here: http://stackoverflow.com/a/359509/548696). Downvoting because of these two reasons. – Tadeck Aug 06 '13 at 00:11
1

@Tadeck Your second point is a personal style preference (even though it's same as mine). – sabof Aug 06 '13 at 00:29
@Tadeck - You are right I should probably remove the regex one. – Derek 朕會功夫 Aug 06 '13 at 00:41

2 Answers2