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Difference between objectForKey and valueForKey?
... @ symbol.
– dreamlax
Jun 30 '09 at 10:17
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objectForKey: accepts any object as a key, not just ...
Remove all special characters, punctuation and spaces from string
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Additionally: "For 8-bit strings, this method is locale-dependent."! Thus the regex alternative is strictly better!
– Antti Haapala
Apr 18 '18 at 7:42
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How can I make pandas dataframe column headers all lowercase?
...asier to write df.columns.astype(str).str.lower() in that case but maybe a bit verbose.
– Anton Protopopov
Sep 21 at 15:39
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What characters are allowed in an email address?
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+100
See RFC 5322: Internet Message Format and, to a lesser extent, RFC 5321: Simple Mail Transfer Protocol.
RFC 822 also covers email a...
Identifying and removing null characters in UNIX
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Use the following sed command for removing the null characters in a file.
sed -i 's/\x0//g' null.txt
this solution edits the file in place, important if the file is still being used. passing -i'ext' creates a backup of the original fil...
Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib
...ce Assemblies\Microsoft\Framework\.NETFramework\v4.0" folder in case of 64 bit windows versions, in that case check if you have a "C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0" folder.
– Maarten Docter
May 29 '13 at 10:12
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Install Gem from Github Branch?
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edited May 20 '19 at 0:10
answered Dec 6 '12 at 18:56
Ar...
AWS Difference between a snapshot and AMI
...volume + a couple of meta data (the architecture of the machine - 32 vs 64 bits -, the type of virtualization - HVM vs PV - etc ...)
So, for EBS backed EC2 instances, an AMI is an EBS snapshot + an XML file. You can even create your own AMI based on any snapshot of a boot volume you own.
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ipython reads wrong python version
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The shell hashing bit me, even after installing ipython inside the virtualenv. hash -r fixed it for me; thanks!
– theY4Kman
Sep 29 '18 at 20:00
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How to resolve “You need to have Ruby and Sass installed and in your PATH for this task to work” War
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This is the same for Windows
– Matt Canty
Sep 23 '15 at 12:51
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