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How to remove the lines which appear on file B from another file A?
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When using this in scripts, make sure to first check that fileB is not empty (0 bytes long), because if it is, you will get an empty result instead of the expected contents of fileA. (Cause: FNR==NR will apply to fileA then.)
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What is the proper way to test if a parameter is empty in a batch file?
... watch out for strings that use double '"' as an escape sequence -- the script will crash when attempting the comparison. E.g. ""this string will crash the comparison"". Double '"' is the proper escape sequence, and doing a substitution on double '"' will fail if the string is empty.
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How to get JavaScript caller function line number? How to get JavaScript caller source URL?
I am using the following for getting the JavaScript caller function name:
15 Answers
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Bash continuation lines
... works well in contexts where you want to embed nontrivial pieces of shell script in another language where the host language's syntax won't let you use a here document, such as in a Makefile or Dockerfile.
printf '%s\n' >./myscript \
'#!/bin/sh` \
"echo \"G'day, World\"" \
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What does the ??!??! operator do in C?
...orHasOccurred() && HandleError(); That is, if you're used to shell scripting. :)
– Yam Marcovic
Oct 24 '11 at 15:01
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How do I parse XML in Python?
...many rows in a database that contains XML and I'm trying to write a Python script to count instances of a particular node attribute.
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How to get current time and date in Android
... assumes ASCII text and is therefore not suitable
for use with non-ASCII scripts.
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Getting only response header from HTTP POST using curl
... if reachable or not). Do not use in, say, conditional statements in shell scripting...
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How to properly add include directories with CMake
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CMake is more like a script language if comparing it with other ways to create Makefile (e.g. make or qmake). It is not very cool like Python, but still.
There are no such thing like a "proper way" if looking in various opensource projects how p...
argparse module How to add option without any argument?
I have created a script using argparse .
2 Answers
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