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What exactly does big Ө notation represent?
I'm really confused about the differences between big O, big Omega, and big Theta notation.
6 Answers
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What's the absurd function in Data.Void useful for?
The absurd function in Data.Void has the following signature, where Void is the logically uninhabited type exported by that package:
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How can I convert tabs to spaces in every file of a directory?
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Warning: This will break your repo.
This will corrupt binary files, including those under svn, .git! Read the comments before using!
find . -iname '*.java' -type f -exec sed -i.orig 's/\t/ /g' {} +
The original file is saved as...
What breaking changes are introduced in C++11?
I know that at least one of the changes in C++11 that will cause some old code to stop compiling: the introduction of explicit operator bool() in the standard library, replacing old instances of operator void*() . Granted, the code that this will break is probably code that should not have been v...
Simplest way to detect a mobile device in PHP
What is the simplest way to tell if a user is using a mobile device to browse my site using PHP?
15 Answers
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Is std::vector so much slower than plain arrays?
I've always thought it's the general wisdom that std::vector is "implemented as an array," blah blah blah. Today I went down and tested it, and it seems to be not so:
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Ruby on Rails generates model field:type - what are the options for field:type?
I'm trying to generate a new model and forget the syntax for referencing another model's ID. I'd look it up myself, but I haven't figured out, among all my Ruby on Rails documentation links, how to find the definitive source.
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Detecting a mobile browser
I'm looking for a function which return boolean value if user has mobile browser or not.
36 Answers
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Checking if a double (or float) is NaN in C++
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According to the IEEE standard, NaN values have the odd property that comparisons involving them are always false. That is, for a float f, f != f will be true only if f is NaN.
Note that, as some comments below have pointed out, no...
What to do Regular expression pattern doesn't match anywhere in string?
I am trying to match <input> type “hidden” fields using this pattern:
8 Answers
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