Question

197

Javascript find if english alphabets only

rated 0 times [ 198] [ 1] / answers: 1 / hits: 36955 / 15 Years ago, mon, march 8, 2010, 12:00:00

Am trying to find some text only if it contains english letters and numbers using Javascript/jQuery.

Am wondering what is the most efficient way to do this? Since there could be thousands of words, it should be as fast as possible and I don't want to use regex.

 var names[0] = 'test';

 var names[1] = 'हिन';

 var names[2] = 'لعربية';



 for (i=0;i<names.length;i++) {

    if (names[i] == ENGLISHMATCHCODEHERE) {

        // do something here

    }

 }

Thank you for your time.

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yesseniadajab

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2 Years ago

answered 15 Years ago aileent · Accepted Answer

A regular expression for this might be:

var english = /^[A-Za-z0-9]*$/;

Now, I don't know whether you'll want to include spaces and stuff like that; the regular expression could be expanded. You'd use it like this:

if (english.test(names[i])) // ...

Also see this: Regular expression to match non-English characters?

edit my brain filtered out the I don't want to use a regex because it failed the isSilly() test. You could always check the character code of each letter in the word, but that's going to be slower (maybe much slower) than letting the regex matcher work. The built-in regular expression engine is really fast.

When you're worried about performance, always do some simple tests first before making assumptions about the technology (unless you've got intimate knowledge of the technology already).