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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...
Numpy array assignment with copy
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Not the answer you're looking for? Browse other questions tagged python arrays numpy or ask your own question.
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...
Recursive lambda functions in C++11
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Wondering why this isn't marked as 'answer', and that Python one is classified as 'Answer' ?!
– Ajay
Jan 26 '13 at 6:05
1
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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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Not the answer you're looking for? Browse other questions tagged python pandas or ask your own question.
Where can I get a list of Ansible pre-defined variables?
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"ansible_python_version": "2.7.3",
"ansible_selinux": false,
"ansible_swapfree_mb": 766,
"ansible_swaptotal_mb": 767,
"ansible_system": "Linux",
"ansible_system_vendor": "innotek GmbH",
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How to show all shared libraries used by executables in Linux?
... objdump:
$(CROSS_COMPILE)objdump -p
For instance:
objdump -p /usr/bin/python:
Dynamic Section:
NEEDED libpthread.so.0
NEEDED libdl.so.2
NEEDED libutil.so.1
NEEDED libssl.so.1.0.0
NEEDED libcrypto.so.1.0.0
NEEDED ...
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.
share
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improve this answer
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What is the purpose of Flask's context stacks?
... multiple apps. Imagine the situation where you want to have a single WSGI Python interpreter run multiple Flask application. We're not talking Blueprints here, we're talking entirely different Flask applications.
You might set this up similar to the Flask documentation section on "Application Disp...