How to Modify string Inside character, Javascript Regex

Question

How to modify:

var a = ' z this is ok z ';
a = a.replace(/z(.*)z/, function(match){ return match.trim().toUpperCase();});
console.log(a); // output: " Z THIS IS OK Z "

I expect " ZTHIS IS OKZ ";

the uppercase work, but the trim function is ignored

in your expected output you have spaces at the very beginning and end, are those supposed to be there? — depperm
– depperm, Commented Jul 22, 2015 at 13:54
yes i just need to remove the space between Z and THIS then OK and Z — Jigong Bagong
– Jigong Bagong, Commented Jul 22, 2015 at 13:55

Wes Foster · Accepted Answer · 2015-07-22 14:07:49Z

1

You are matching the spaces with (*). Change to:

var a = ' z this is ok z ';

// Here, you'll notice that I added the spaces next to the "z" character.
a = a.replace(/z (.*?) z/, " Z$1Z ").toUpperCase();

console.log(a); // output: " ZTHIS IS OKZ "

What this does is match everything between the "z", and then rewrites it with "Z" directly next to it.

edited Jul 22, 2015 at 14:07

answered Jul 22, 2015 at 13:56

Wes Foster

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2 Comments

Jigong Bagong Over a year ago

I'm sorry but this is also remove spaces in the first and last "ZTHIS IS OKZ"

Wes Foster Over a year ago

I've updated my answer to include the spaces at the beginning and end.

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