CODEWITHSUNDEEP
javascriptstringmatching
Oskar Alfons
Oskar Alfons

Reputation: 655

javascript match exact string

how can I check with javascript if one string contains an other string? I have like something like:

var a = "Paris, France"
var b = "Paris.."
a.match(b) //returns "Paris, " but should return null

I think the problem is that match uses regexp. Is there a possibility to allow Sympols like .,-/\ etc. ? Thanks

Upvotes: 0

Views: 3836

Answers (2)

lukaleli
lukaleli

Reputation: 3635

You can use indexOf method:

var a = "Paris, France"
var b = "Paris.."
if(a.indexOf(b) != -1){
    //string a contains string b   
}

Upvotes: 0

Rajesh
Rajesh

Reputation: 3778

To see if one string contains another, use String.indexOf():

  var str = 'Paris, France';
  var strIndex = str.indexOf('Paris..');
  if(strIndex == -1) {
     //string not found
  } else {
    //string found
  }

But, just in case you want to have a contains() function, you can add it to String as below:

 if(!('contains' in String.prototype)) {
       String.prototype.contains = function(str, startIndex) {
                return -1 !== String.prototype.indexOf.call(this, str, startIndex);
       };
 }

var str = 'Paris, France';
var valid = str.contains('Paris..');
if(valid) {
  //string found
} else {
  //string not found
}

Upvotes: 2

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