value.replace regex help needed with javascript function

Question

i am having a problem with some regex in a javascript function My string looks like this...

[Space]SomeString[Space][Tab]SomeString[Space][Tab][LineBreak]

SomeString[LineBreak]

[Space]SomeString[Space][Tab]SomeString[Space][Tab][LineBreak]

SomeString[LineBreak]

I want to remove the [Tab][LineBreak] but keep the [LineBreak] so my output would be

[Space]SomeString[Space][Tab]SomeString[Space]SomeString[LineBreak]

[Space]SomeString[Space][Tab]SomeString[Space]SomeString[LineBreak]

I have tried:

value.replace(/\t\n/g, '');

but that didn't work i also tried:

value.replace(/\s+/g, '');

but that removed all the line breaks

Can anyone help please? Thanks

I finally solved it thank goodness!! You're not gonna believe this but the code was fine all along. I was echoing the script in php and it was converting the /t and /n into tabs and breaks in my source, so no wonder it didnt work. hahaha. Thanks for all the help tho guys. — FoxyFish
– FoxyFish, Commented May 14, 2013 at 15:19

alexbusu · Accepted Answer · 2013-05-14 13:36:21Z

2

This will do the trick

str.replace(/\t(\r\n|\r|\n)/g,'');

Here is a demo fiddle.

Edit:

str = str.replace(/^\s|\t([\r\n]+)|([\r\n]+)\t|\s$/g,'');

Here is the "upgraded" example

edited May 14, 2013 at 13:36

answered May 13, 2013 at 15:15

alexbusu

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4 Comments

Martijn Over a year ago

That will remove both the tab AND the line break.

alexbusu Over a year ago

That's right, tab+break is removed, but a break that is not preceded by tab will not.

FoxyFish Over a year ago

i updated the fiddle jsfiddle.net/9fC4K/3 with my exact string but used x's and o's. The fiddle works, but mine still doesnt?

alexbusu Over a year ago

jsfiddle.net/9fC4K/6 I used str.replace(/^\s|\t([\r\n]+)|([\r\n]+)\t|\s$/g,'$2'); So... ^\s : the string begins with a whitespace; \t([\r\n]+) : the string contain a TAB followed by line break ; ([\r\n]+)((\t)) : the string contains a line break followed by a TAB ; \s$ : the string ends with a whitespace. When any of these conditions matches then the matched content is removed.

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