combining negation to and with other expressions

combining negation to and with other expressions

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combining negation to and with other expressions
Tag : regex , By : antonio
Date : January 11 2021, 03:32 PM

this one helps. The non-capturing groups of negative lookahead definitely provide the AND functionality you're looking for, so here's one way you could extend that reasoning:

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String negation using regular expressions

Tag : regex , By : brennen
Date : March 29 2020, 07:55 AM
should help you out Is it possible to do string negation in regular expressions? I need to match all strings that do not contain the string "..". I know you can use ^[^\.]*$ to match all strings that do not contain "." but I need to match more than one character. I know I could simply match a string containing ".." and then negate the return value of the match to achieve the same result but I just wondered if it was possible. , You can use negative lookaheads:

Negation using regular expressions

Tag : regex , By : T11M
Date : March 29 2020, 07:55 AM
wish of those help A pretty simple expression, like <[^>]*>, and a re.sub() can solve this:
my_text = re.sub(r"<[^>]*>", "", my_text)

# some    STUFF   here
# Obary   SEES    Obary
# ...

Combining or and negation in Java regex?

Tag : java , By : ranja
Date : January 11 2021, 03:28 PM
I hope this helps you . I am trying to combine the usage of "not" and "or" to produce a set of regex matching like so: , For first 2 conditions you may use:

negation of boolean expressions with XOR

Tag : java , By : sam
Date : March 29 2020, 07:55 AM
I wish this helpful for you Using ^ as a logical XOR operator is highly unusual. It works, but I would avoid it for readability's sake. != is a good replacement.
return !((val1 != null) != (val2 != null)) && !(val2 != null && val1.compareTo(val2) != 0);
return ((val1 != null) == (val2 != null)) && !(val2 != null && val1.compareTo(val2) != 0);
return ((val1 != null) == (val2 != null)) && (val2 == null || val1.compareTo(val2) == 0);
if (val1 == null) {
    return val2 == null;
else {
    return val2 != null && val1.compareTo(val2) == 0;
return val1 == null
    ? val2 == null
    : val2 != null && val1.compareTo(val2) == 0;
if (val1 == null) {
    return val2 == null;
else {
    return val1.equals(val2);

Is there any negation logics for expressions in ballerina?

Tag : development , By : Justin Bowers
Date : March 29 2020, 07:55 AM
I wish this helpful for you I want to know whether it is possible to negate the expression in ballerina like , Yes, you could simply use (!expression).
boolean test = true;

if (!test){
} else {
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