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Generating all permutations of a given string
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Where is Vagrant saving changes to the VM?
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Random string generation with upper case letters and digits
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ContinuousSpeech 连续语音识别扩展：持续语音识别无需重复启动 · App Inventor 2 中文网
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How can I reverse the order of lines in a file?
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AngularJS For Loop with Numbers & Ranges
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Given a number, find the next higher number which has the exact same set of digits as the original n
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Float vs Decimal in ActiveRecord
...Float. It's like a scientific notation for binary (something like +1.43*10^2). Because of that, it is impossible to store fractions and decimals in Float exactly.
That's why there is a Decimal format. If you do this:
irb:001:0> "%.47f" % (1.0/10)
=> "0.10000000000000000555111512312578270211...
regex.test V.S. string.match to know if a string matches a regular expression
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Michał Perłakowski
63.1k2121 gold badges133133 silver badges148148 bronze badges
answered Jun 7 '12 at 21:26
gdoron is suppor...