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How can I preview a merge in git?
...Kasapo
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Is Meyers' implementation of the Singleton pattern thread safe?
Is the following implementation, using lazy initialization, of Singleton (Meyers' Singleton) thread safe?
6 Answers
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Drawing a connecting line between two elements [closed]
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answered Jun 8 '11 at 18:47
Tomasz KowalczykTomasz Kowalczyk
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Listing all permutations of a string/integer
...acb
b + perm(ac) --> bac, bca
c + perm(ab) --> cab, cba
perm(abc...z) -->
a + perm(...), b + perm(....)
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I found the pseudocode on http://www.programmersheaven.com/mb/Algorithms/369713/369713/permutation-algorithm-help/:
makePermutations(permutation) {
if (length permutation < ...
How to limit the maximum value of a numeric field in a Django model?
...ld and override its validation logic.
The more I think about this, I realize how useful this would be for many Django apps. Perhaps a IntegerRangeField type could be submitted as a patch for the Django devs to consider adding to trunk.
This is working for me:
from django.db import models
class I...
unsigned int vs. size_t
I notice that modern C and C++ code seems to use size_t instead of int / unsigned int pretty much everywhere - from parameters for C string functions to the STL. I am curious as to the reason for this and the benefits it brings.
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Why do I get a segmentation fault when writing to a “char *s” initialized with a string literal, but
...e C FAQ, Question 1.32
Q: What is the difference between these initializations?
char a[] = "string literal";
char *p = "string literal";
My program crashes if I try to assign a new value to p[i].
A: A string literal (the formal term
for a double-quoted string in C
source) can be ...
What is the 'new' keyword in JavaScript?
...rted by relatively new browsers (and not all of them). There is a standardized way coming up, namely Object.getPrototypeOf(obj), but it is Ecmascript3.1, and is itself only supported on new browers - again. It is generally recommended to not use that property though, stuff gets complicated real fast...
Which iOS app version/build number(s) MUST be incremented upon App Store release?
...Liu
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How to make an immutable object in Python?
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