Regex match in javascript

Question

I would like to match the following term in JavaScript using regex.

String = 'abc AND def AND igk AND lmn'

Terms to match: the word before and after first AND.

For example in the above string the match part will be : abc AND def.

I want to do it in JavaScript. So I will call

string.match(/regex to use/)

and assign it to a var.

Any suggestions please.

EDIT:

the string can be of form like:

    string = 'AND abc';
    string = 'abc AND';
    string = 'abc def AND igk lmn';
    string = 'abc def AND';
    string = 'AND igk lmn';

Appreciate your help in this regard.

So the words before/after are optional? Or should there only be a match if both words are actually present? Could there be a string 'AND' (and if so, what should happen)? — Tim Pietzcker
– Tim Pietzcker, Commented May 22, 2012 at 12:09
Are you interested in matching abc if your string is 'abc' (no AND at all)? — Igor Korkhov
– Igor Korkhov, Commented May 22, 2012 at 12:19
if i dont have word before or after AND, no issues, i will get blank. If only AND present my both words will be blank. So words are optional can be present or absent. I will validate them after and have null passed. — kailash19
– kailash19, Commented May 22, 2012 at 12:38

Igor Korkhov · Accepted Answer · 2012-05-22 13:18:26Z

3

You can try this regex:

/(\w+\s+AND\s+\w+)/

EDIT (after having read your last update): if left and right terms are optional, use the following regex instead:

/(?: (\w+) \s+)? AND (?: \s+ (\w+))?/x

edited May 22, 2012 at 13:18

answered May 22, 2012 at 11:27

Igor Korkhov

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4 Comments

Tim Pietzcker Over a year ago

You need to remove the ^ or this will fail if there is more than one word before the first AND.

Tim Pietzcker Over a year ago

I have made the edit; as long as you don't use the /g modifier, this regex will find the first occurrence of AND plus the two words around it (provided a "word" is defined as "as series of ASCII alphanumeric characters").

Igor Korkhov Over a year ago

Thanks, Tom. I put ^ because it was unclear before the OP's last edit what exactly needed to be matched.

kailash19 Over a year ago

Thanks :0 to match my cases i am using it as: /(\w*\sAND\s*\w)/

HBP · Accepted Answer · 2012-05-22 12:22:10Z

1

A slight improvement on Igor's version :

   var m = str.match (/(\w+)\s+AND\s+(\w+)/);
   // word before AND in m[1], word after AND in m[2]

Automagically extracts the two words.

answered May 22, 2012 at 12:22

HBP

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1 Comment

kailash19 Over a year ago

i am using it as: /(\w*)\sAND\s*(\w)/. Thank you

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