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Linux command or script counting duplicated lines in a text file?
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Send it through sort (to put adjacent items together) then uniq -c to give counts, i.e.:
sort filename | uniq -c
and to get that list in sorted order (by frequency) you can
sort filename | uniq -c | sort -nr
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List of all special characters that need to be escaped in a regex
I am trying to create an application that matches a message template with a message that a user is trying to send. I am using Java regex for matching the message. The template/message may contain special characters.
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How to get the path of the batch script in Windows?
...now that %0 contains the full path of the batch script, e.g. c:\path\to\my\file\abc.bat
7 Answers
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What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
What the title says: what does it mean to encapsulate a variable in {} , "" , or "{} "? I haven't been able to find any explanations online about this - I haven't been able to refer to them except for using the symbols, which doesn't yield anything.
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Is the “struct hack” technically undefined behavior?
What I am asking about is the well known "last member of a struct has variable length" trick. It goes something like this:
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How do I get monitor resolution in Python?
What is the simplest way to get monitor resolution (preferably in a tuple)?
30 Answers
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How to see JavaDoc in IntelliJ IDEA? [duplicate]
I just switched from Eclipse to IntelliJ. IntelliJ lacks one feature from Eclipse - when you put your mouse over a method, Eclipse shows javadoc info. I think the way to show it is to use a shortcut - command + J , but when I click it, I get something wrong as on the screen shot below. Please adv...
Why does Decimal.Divide(int, int) work, but not (int / int)?
How come dividing two 32 bit int numbers as ( int / int ) returns to me 0 , but if I use Decimal.Divide() I get the correct answer? I'm by no means a c# guy.
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Kotlin secondary constructor
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Update: Since M11 (0.11.*) Kotlin supports secondary constructors.
For now Kotlin supports only primary constructors (secondary constructors may be supported later).
Most use cases for secondary constructors are solved by one of the te...