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What is your single most favorite command-line trick using Bash? [closed]
...es with suffixes quickly:
cp /home/foo/realllylongname.cpp{,-old}
This expands to:
cp /home/foo/realllylongname.cpp /home/foo/realllylongname.cpp-old
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answered Sep 16 '0...
What's the fundamental difference between MFC and ATL?
... nothing fancy), what is the fundamental difference I will see between ATL and MFC, to help me figure out which one to use?
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How to make a valid Windows filename from an arbitrary string?
...gBuilder instead of a simple string; the original version will take longer and consume more memory.
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How can I make a Python script standalone executable to run without ANY dependency?
I'm building a Python application and don't want to force my clients to install Python and modules.
19 Answers
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How can I remove the first line of a text file using bash/sed script?
...you the last 5 lines of the input. The + sign kind of inverts the argument and make tail print anything but the first x-1 lines. tail -n +1 would print the whole file, tail -n +2 everything but the first line, etc.
GNU tail is much faster than sed. tail is also available on BSD and the -n +2 flag i...
What are best practices for validating email addresses on iOS 2.0
...his modification of DHValidation:
- (BOOL) validateEmail: (NSString *) candidate {
NSString *emailRegex =
@"(?:[a-z0-9!#$%\\&'*+/=?\\^_`{|}~-]+(?:\\.[a-z0-9!#$%\\&'*+/=?\\^_`{|}"
@"~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\"
@"x7f]|\\\\[\\x01-\\x09\\x0b\\x0c...
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
...SL_CERT_FILE=/usr/local/etc/openssl/certs/cert.pem
– andersjanmyr
Dec 20 '12 at 12:04
5
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What is the smallest possible valid PDF?
... This will not work, you need to define a font resource and select it inside the page content for the text to show up.
– yms
Aug 21 '15 at 20:36
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Can a local variable's memory be accessed outside its scope?
...u rent a hotel room. You put a book in the top drawer of the bedside table and go to sleep. You check out the next morning, but "forget" to give back your key. You steal the key!
A week later, you return to the hotel, do not check in, sneak into your old room with your stolen key, and look in the ...
How to find the largest file in a directory and its subdirectories?
We're just starting a UNIX class and are learning a variety of Bash commands. Our assignment involves performing various commands on a directory that has a number of folders under it as well.
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