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What is copy-on-write?
...first write operation, hence the name ‘copy-on-write’.
Here after is a Python implementation of the copy-on-write technique using the proxy design pattern. A ValueProxy object (the proxy) implements the copy-on-write technique by:
having an attribute bound to an immutable Value object (the subj...
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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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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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",
...
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.
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