Problems to negate regex pattern

Question

I have several regex patterns and i have to negate them all, so i am trying to build somo generic regex negate, something like /^(anypattern)/ but I am having troubles..

for example, I have this text: zzzzzAAAAA@AAAA_AAAzzzzzzAAAAA@AAAA.AAAggggggAAAAA@AAA.AAAooooooooo

and this pattern: [A-Z]+@[A-Z]+\\.[A-Z]{2,4}, I need something to negate this. I would get the an array with the following matches:

zzzzzAAAAA@AAAA_AAAzzzzzz , gggggg , ooooooooo

Note that AAAAA@AAAA_AAA was included only because this have a _ instead a dot

my regex are all simple, dont having any of these especial caracteres: \s,\t,\r,\n,\v,\f,\b,etc..

I tryed to solve it with negative lookarounds but without success

Is it the negation you want: `[^A-Z]+[^@][^A-Z]+[^.][^A-Z]{2,4}`? https://regex101.com/r/uT3pQ2/1. — Wiktor Stribiżew, May 01 '15 at 17:58
@stribizhev your solution dont match `zzzzzAAAAA@AAAA_AAAzzzzzz` — leandromoh, May 01 '15 at 18:03
a possible way i think is split the string with the original regex, but i would be using a programming language, somthing i dont want — leandromoh, May 01 '15 at 18:04
possible duplicate of [How to negate the whole regex?](http://stackoverflow.com/questions/2637675/how-to-negate-the-whole-regex) — JDB, May 01 '15 at 18:05
@JDB isnt what I tryied negative lookahead? `(?!([A-Z]+@[A-Z]+\\.[A-Z]{2,4}))` — leandromoh, May 01 '15 at 18:10

score 1 · Accepted Answer · edited May 23 '17 at 11:46

Try using a split with the regex exactly as you have it?

var input = "zzzzzAAAAA@AAAA_AAAzzzzzzAAAAA@AAAA.AAAggggggAAAAA@AAA.AAAooooooooo"
var output = input.split(/[A-Z]+@[A-Z]+\.[A-Z]{2,4}/)
console.log(output)

// outputs ["zzzzzAAAAA@AAAA_AAAzzzzzz", "gggggg", "ooooooooo"]

However, you may need to clean out empty elements, consider

var input = "AAAAA@AAAA.AAAzzzzzAAAAA@AAAA_AAAzzzzzzAAAAA@AAAA.AAAggggggAAAAA@AAA.AAAooooooooo"
var output = input.split(/[A-Z]+@[A-Z]+\.[A-Z]{2,4}/)
console.log(output)
// outputs ["", "zzzzzAAAAA@AAAA_AAAzzzzzz", "gggggg", "ooooooooo"]

After the setting the output variable, you can add this courtesy of this answer

output = output.filter(function(n){ return n != undefined && n.length})
// which outputs ["zzzzzAAAAA@AAAA_AAAzzzzzz", "gggggg", "ooooooooo"]

@cfquerymaram This is exacty what I want, but is there a way to do it only with regex? — leandromoh, May 01 '15 at 19:41

Problems to negate regex pattern

1 Answers1