Question

157

what is the best way to check if a string exists in another?

rated 0 times [ 162] [ 5] / answers: 1 / hits: 16021 / 13 Years ago, thu, september 1, 2011, 12:00:00

Possible Duplicate:

JavaScript: string contains

I'm looking for an algorithm to check if a string exists in another.

For example:

'Hello, my name is jonh LOL.'.contains('Hello, my name is jonh'); //true

'LOL. Hello, my name is jonh'.contains('Hello, my name is jonh'); //true

Thanks in advance.

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peytont

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1 Year ago

answered 13 Years ago daquanmilesw · Accepted Answer

Use indexOf:

'Hello, my name is jonh LOL.'.indexOf('Hello, my name is jonh') > -1; //true

'LOL. Hello, my name is jonh'.indexOf('Hello, my name is jonh') > -1; //true

You can also extend String.prototype to have a contains function:

String.prototype.contains = function(substr) {

  return this.indexOf(substr) > -1;

}

'Hello, my name is jonh LOL.'.contains('Hello, my name is jonh'); //true

'LOL. Hello, my name is jonh'.contains('Hello, my name is jonh'); //true