expression Archives - Page 4 of 6 - Simon Technology Blog

Regular expression – Search repeated files across multiple directory

I downloaded some files related to a specific topic from the Internet. Now I want to check if there are any duplicates in the files. The problem is that the names of the files will be different, bu

October 18, 2021By Simo Regexp catalog, Content, cross, expression, file, lookup, multiple, press, regular, repetitionLeave a Comment

Regular expression – how to search for words or plural versions [copy]

See the English answer> Regex search and replace with optional plural 4
I am trying to make a simple regular expression, what I want to do is to match the strange part of a word, Whether it has an

October 18, 2021By Simo Regexp Copy, expression, How, plural, regular, search, version, WordLeave a Comment

Regular expression – how to modify IP: PORT regular expressions?

I have normal expressions

match = re.findall(r'[0-9]+(? :\.[0-9]+){3}’, source) It can get content similar to 192.168.1.1 from the source string.
How do I modify this regular expression to ma

October 18, 2021By Simo Regexp expression, How, IP, modification, port, regularLeave a Comment

Regular expression – check if there is only space in the string

How to check if there are only spaces in a string?

I want to use conditions in an if() statement.

For example,

str<-" "< br />#check if str has only white spaces? example usage
i

October 18, 2021By Simo Regexp check, expression, in, is there, only, regular, stringLeave a Comment

Regular expression – What is the best way to make a string operation in a shell script?

I have a path as a string in a shell script, which can be absolute or relative:

/usr/userName/config.cfg< /p> or

../config.cfg

I want to extract the file name (the part after the

October 18, 2021By Simo Regexp expression, method, middle, operation, optimal, procedure, regular, Script, shell, string, whatLeave a Comment

Text handling CUT, SORT, UNIQ, PASTE regular expression

Text processing cut, sort, uniq, paste regular expressions 1 cut Extract text by column cut -d DELIMITER -f FILEDS .example,cut -d: -f1, use- d: Colon separator, use f1 to get the first column.