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Ruby - test for array
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edited Mar 30 at 18:35
siery
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answered Oct 6 '09 at 20:23
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Can hash tables really be O(1)?
It seems to be common knowledge that hash tables can achieve O(1), but that has never made sense to me. Can someone please explain it? Here are two situations that come to mind:
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Reverse a string in Python
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How about:
>>> 'hello world'[::-1]
'dlrow olleh'
This is extended slice syntax. It works by doing [begin:end:step] - by leaving begin and end off and specifying a step of -1, it reverses a string.
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How to get the difference between two arrays in JavaScript?
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How can I get the behavior of GNU's readlink -f on a Mac?
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readli...
Which iOS app version/build number(s) MUST be incremented upon App Store release?
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Tool to read and display Java .class versions
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Use the javap tool that comes with the JDK. The -verbose option will print the version number ...
Lambda function in list comprehensions
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The first one creates a single lambda function and calls it ten times.
The second one doesn't ca...
bundle install fails with SSL certificate verification error
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Update
Now that I've karma wh..err mined enough from this answer everyone should know that thi...