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Why is there no GIL in the Java Virtual Machine? Why does Python need one so bad?
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makefile:4: *** missing separator. Stop
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Want to find records with no associated records in Rails
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Better:
Person.includes(:friends).where( :friends => { :person_id => nil } )
For the hmt it's basically the same thing, you rely on the fact that a person with no friends will also have no contacts:
Person.includes(:contacts).where...
How to include a quote in a raw Python string
...ur string, use a triple-quoted string:
r"""what"ev'er"""
If you want to include both kinds of triple-quoted strings in your string (an extremely unlikely case), you can't do it, and you'll have to use non-raw strings with escapes.
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How to count certain elements in array?
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Sticky sidebar: stick to bottom when scrolling down, top when scrolling up
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Check if a string contains an element from a list (of strings)
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How to get orientation-dependent height and width of the screen?
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