Detect presence of a specific pattern in Javascript String

Question

How can i do to search if a Javascript String contains the following pattern :

"@aRandomString.temp"

I would like to know if the String contains @ character and then any String and then ".temp" string.

Thanks

A pattern with a "random string" is not a "specific string" :-) You might fix your title… — Bergi
– Bergi, Commented Oct 2, 2013 at 16:28

Bergi · Accepted Answer · 2013-10-02 16:26:25Z

1

This one liner should do the job using regex#test(Strng):

var s = 'foo bar @aRandomString.temp baz';
found = /@.*?\.temp/i.test(s); // true

edited Oct 2, 2013 at 16:26

Bergi

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answered Oct 2, 2013 at 16:18

anubhava

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Comments

Halcyon · Accepted Answer · 2013-10-02 16:05:58Z

0

Use indexOf to find a string within a string.

var string = "@aRandomString.temp";
var apos = string.indexOf("@");
var dtemp = string.indexOf(".temp", apos); // apos as offset, invalid: ".temp @"
if (apos !== -1 && dtemp !== -1) {
    var aRandomString = string.substr(apos + 1, dtemp - apos);
    console.log(aRandomString); // "aRandomString"
}

answered Oct 2, 2013 at 16:05

Halcyon

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1 Comment

Bergi Over a year ago

I don't understand (+1), but your solution is a bit complicated :-) Also OP only wants to know whether the match exists, not what the random string is.

Travis J · Accepted Answer · 2013-10-02 16:16:09Z

0

You can try this

var str = "@something.temp";

if (str.match("^@") && str.match(".temp$")) {

}

demo

edited Oct 2, 2013 at 16:16

Travis J

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answered Oct 2, 2013 at 16:12

Bala

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1 Comment

Bergi Over a year ago

The question asks for "contains", not for "is". Also, forgot to escape your regex, and you should use test instead of match

Diego · Accepted Answer · 2013-10-02 16:32:25Z

0

You can use the match function. match expects the regular expression.

function myFunction()
{
    var str="@someting.temp"; 
    var n=str.test(/@[a-zA-Z]+\.temp/g);
}

Here is a demo: http://jsbin.com/IBACAB/1

edited Oct 2, 2013 at 16:32

answered Oct 2, 2013 at 16:08

Diego

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3 Comments

Bergi Over a year ago

What about the .temp part? Also, use test instead of match.

Diego Over a year ago

I have it in the regexp: (/@[a-zA-Z]+\.temp

Diego Over a year ago

@Bergi I am assuming that string only contains letters

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