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What are '$$' used for in PL/pgSQL
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The dollar signs are used for dollar quoting and are in no way specific to function definitions. It can be used to replace single quotes practically anywhere in SQL scripts.
The body of a function happens to be a string literal which has to be enclo...
What is the difference between gravity and layout_gravity in Android?
... other way around. Every time, I think "layout_gravity" means "the gravity for how this ViewGroup lays out it's contents", and "gravity" is "where this View gravitates to".
– Ogre
Aug 9 '13 at 5:29
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Replace one character with another in Bash
...ar=${foo// /.}
See http://tldp.org/LDP/abs/html/string-manipulation.html for more details.
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How to delete the last n commits on Github and locally?
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Can you generalize this for last n number of commits?
– user_19
Apr 29 '14 at 0:39
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Why is MySQL's default collation latin1_swedish_ci?
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The bloke who wrote it was co-head of a Swedish company.
Possibly for similar reasons, Microsoft SQL Server's default language us_english.
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How to identify whether a file is normal file or directory
... keep in mind that these are not the only two cases. Use os.path.islink() for symlinks for instance. Furthermore, these all return False if the file does not exist, so you'll probably want to check with os.path.exists() as well.
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RegEx to find two or more consecutive chars
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[a-zA-Z]{2,} does not work for two or more identical consecutive characters. To do that, you should capture any character and then repeat the capture like this:
(.)\1
The parenthesis captures the . which represents any character and \1 is the result...
How to convert `git:` urls to `http:` urls
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Here's an example of rewriting the default protocol for GitHub:
git config --global url.https://github.com/.insteadOf git://github.com/
Git documentation for url.<base>.insteadOf:
git config [--global] url.<base>.insteadOf <other_url>
Any URL that starts wi...
Open a project in a new window in IntelliJ after “accidentally” clicking remember decision
...ces | Appearance & Behavior | System Settings | Project Opening (or, before version 15, File | Settings/Preferences | General | Project Opening)
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.NET Process.Start default directory?
... application from inside of a C# .NET console application. It works fine for the case where the Java application doesn't care what the "default" directory is, but fails for a Java application that only searches the current directory for support files.
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