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“Width equals height” constraint in Interface Builder
I can't find a way to create a 'square' constraint, meaning 'width equals height' in Interface Builder. I guess it's possible to add such constraint programmatically. Is there something I can do in IB? Maybe I just don't see it? It seems trivial, yet I can't find it.
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Excluding directories in os.walk
I'm writing a script that descends into a directory tree (using os.walk()) and then visits each file matching a certain file extension. However, since some of the directory trees that my tool will be used on also contain sub directories that in turn contain a LOT of useless (for the purpose of thi...
Difference between make and build in Android Studio
The Android Studio Build menu has options including
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How to add an auto-incrementing primary key to an existing table, in PostgreSQL?
... have a table with existing data. Is there a way to add a primary key without deleting and re-creating the table?
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How to change owner of PostgreSql database?
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ALTER DATABASE name OWNER TO new_owner;
See the Postgresql manual's entry on this for more details.
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Running a cron job at 2:30 AM everyday
How to configure a cron job to run every night at 2:30? I know how to make it run at 2, but not 2:30.
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How to compare two files not in repo using git
...ke to compare two css files which are not in any git repository. Is there such a functionality in git?
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Invoking a static method using reflection
...voke the main method which is static. I got the object of type Class , but I am not able to create an instance of that class and also not able to invoke the static method main .
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How do I merge a git tag onto a branch
...g to find the syntax for merging a tagged commit onto another branch. I'm guessing that it's straight forward but my feeble search attempts aren't finding it.
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Why can I type alias functions and use them without casting?
In Go, if you define a new type e.g.:
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