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How do I sort an array of hashes by a value in the hash?
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Ruby's sort doesn't sort in-place. (Do you have a Python background, perhaps?)
Ruby has sort! for in-place sorting, but there's no in-place variant for sort_by in Ruby 1.8. In practice, you can do:
sorted = sort_me.sort_by { |k| k["value"] }
puts sorted
As of Ruby 1.9+, .so...
How does the socket API accept() function work?
...ding a detailed description of one implementation, check out the source in Linux or Solaris or one of the BSD's.
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Numpy array assignment with copy
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Best algorithm for detecting cycles in a directed graph [closed]
...eighbors v of u, a node is encountered with the GRAY color.
The following Python code is an adaptation of CLRS' pseudocode with an if clause added which detects cycles:
import collections
class Graph(object):
def __init__(self, edges):
self.edges = edges
self.adj = Graph._bui...
How can I specify a branch/tag when adding a Git submodule?
...s good to use git submodules even for projects that are updated often. The linux kernel uses it and it isn't so bad
– user9903
Apr 30 '13 at 18:15
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Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
...p = x * temp
imul eax, eax ; temp = temp * temp
I'm using system GCC on Linux Mint 16 Petra, an Ubuntu derivative. Here's the gcc version:
$ gcc --version
gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
As other posters have noted, this option is not possible in floating point, because floating poi...
Why can't code inside unit tests find bundle resources?
...eing run on macOS. However, Bundle is not currently implemented for Ubuntu Linux.
Also, command line swift build and swift test do not currently provide a mechanism for copying resources.
However, with some effort, it is possible to set up processes for using the Swift Package Manger with resources ...
Android Studio installation on Windows 7 fails, no JDK found
... I could have two environments: 32 for eclipse and 64 for studio (I recall Python had a solution of virtual machine (or env) and one could toggle easily between 'profiles'.
– eugene
Aug 25 '14 at 14:31
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Pandas aggregate count distinct
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Why should the “PIMPL” idiom be used? [duplicate]
...) {
return new FooImpl;
}
Does this pattern have a name?
As an also Python and Java programmer, I like this a lot more than the pImpl idiom.
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