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What's the Best Way to Shuffle an NSMutableArray?
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I solved this by adding a category to NSMutableArray.
Edit: Removed unnecessary method thanks to answer by Ladd.
Edit: Changed (arc4random() % nElements) to arc4random_uniform(nElements) thanks to answer by Gregory Goltsov and comments b...
How to select where ID in Array Rails ActiveRecord without exception
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If it is just avoiding the exception you are worried about, the "find_all_by.." family of functions works without throwing exceptions.
Comment.find_all_by_id([2, 3, 5])
will work even if some of the ids don't exist. This works in the
user.comments.find_all_by_id(potentially_nonexistent_ids)
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Create empty queryset by default in django form fields
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You can have an empty queryset by doing this:
MyModel.objects.none()
Although i don't know how are you going to use that form, you can put that as your field's queryset in order to get what you need...
You can find more information here
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Colored logcat in android studio by colorpid
...r – Color Scheme – Android Logcat.
Here is Darcula theme, suggested by Matouš Skála:
Darcula colors:
Debug : 6897BB
Info : 6A8759
Warn : BBB529
Error : FF6B68
Assert : 9876AA
Only show logcat from selected process is supported by default feature at AndroidStudio. If you are not ...
LINQ - Left Join, Group By, and Count
...tId equals c.ChildParentId into j1
from j2 in j1.DefaultIfEmpty()
group j2 by p.ParentId into grouped
select new { ParentId = grouped.Key, Count = grouped.Count(t=>t.ChildId != null) }
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How do you get the list of targets in a makefile?
I've used rake a bit (a Ruby make program), and it has an option to get a list of all the available targets, eg
20 Answers
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Is there a way to make git pull automatically update submodules?
...recurse to true to enable the desired behaviour.
You can do this globally by running:
git config --global submodule.recurse true
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Sort array by firstname (alphabetically) in Javascript
I got an array (see below for one object in the array) that I need to sort by firstname using JavaScript.
How can I do it?
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What is object slicing?
...u assign an object of a derived class to an instance of a base class, thereby losing part of the information - some of it is "sliced" away.
For example,
class A {
int foo;
};
class B : public A {
int bar;
};
So an object of type B has two data members, foo and bar.
Then if you were to w...
How to have a default option in Angular.js select box
... I had a problem with this working, it was that I was using 'track by', removing it fixed the problem, just in case that helps someone down the line :D
– DrCord
Apr 15 '14 at 23:21
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