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In Perl, I would like to determine if a given string is valid, the rule is to check if values exist between commas.
e.g. abc,abc is a valid case, but abc, or abc,,abc are not.
m/^\s*,|,\s*,|,\s*$/
matches all invalid combinations, assuming whitespace does not count as "values".
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mission_id: a498094578a
mission_id: a493453456
mission_id: 498343454a
mission_id: 34534535345
From the above 4 mission_id's I need your help in writing a regex pattern which covers all the four mission_id but need to select only the numbers.
So one the first one - need to exempt 'a' and only the numbers.
mission_id:\s*\w?(\d*)\w?
That should work; maybe add any flags you need for parsing multiline text or whatever.
www.regexr.com is a great resource for trying out RegExps
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I am looking to extract all the entries from the following string:
[
"GUID_ID_ONE",
"2016-07-11T18:35:29Z",
"email#address.com",
"HASH_STRING",
"GUID_KEY_TWO",
"GUID_KEY_THREE"
]
I would like a RegEx to extract all the strings, quotes omitted. I have used
"(.*?)"
but this would appear to only find the first string.
Depending on the language you're using, the implementation can be different but you need to use the global modifier(g) to get all the matching strings, like this :
/"(.*?)"/g
Check here
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i am new to this regex thing, how can we build regex expression for following thig
input==>[User:1490474408:michaelayliffe]
output should be ==>1490474408
input will be anything like below:
1.[User:1490474408:michaelayliffe]
2.[User:12345:dfhdfhdf]
3.[User:56789:utyutyutyu]
Output should be middle value.
Please reply.
(?<=\[User:)[^:]+
Using lookbehind should work for you.
/\d+/g
It is find digits those are middle of your string
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I want to pass values those are not equal zero (0). What is the best performing regex pattern for this ?
[^0]+
Means: Any character besides zero must occur at least once
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I'm looking for the regular expression to find failures in a log file.
The format is "Failures: " following the number of error, a digit not zero
Thanks!
You can use this:
"Failures:\s+[1-9]\d*"
this would be what you are looking for:
Failures:\s*[1-9]\d*
btw, you may want to know that in character class, the not notation is ^, not !.
E.g. [^a-zA-Z] means not letters.