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What does !! mean in ruby?
...are nil and false, so it's usually best to let that convention stand.
Think of it as
!(!some_val)
One thing that is it used for legitimately is preventing a huge chunk of data from being returned. For example you probably don't want to return 3MB of image data in your has_image? method, or you ...
How do I loop through a list by twos? [duplicate]
...loop through a Python list and process 2 list items at a time. Something like this in another language:
7 Answers
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Is using Random and OrderBy a good shuffle algorithm?
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It's not a way of shuffling that I like, mostly on the grounds that it's O(n log n) for no good reason when it's easy to implement an O(n) shuffle. The code in the question "works" by basically giving a random (hopefully unique!) number to each element, then ord...
How to count the frequency of the elements in an unordered list?
...sort the list before using groupby.
You can use groupby from itertools package if the list is an ordered list.
a = [1,1,1,1,2,2,2,2,3,3,4,5,5]
from itertools import groupby
[len(list(group)) for key, group in groupby(a)]
Output:
[4, 4, 2, 1, 2]
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How do I get an element to scroll into view, using jQuery?
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Since you want to know how it works, I'll explain it step-by-step.
First you want to bind a function as the image's click handler:
$('#someImage').click(function () {
// Code to do scrolling happens here
});
That will apply the click h...
Convert an NSURL to an NSString
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RandallRandall
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How to initialise memory with new operator in C++?
I'm just beginning to get into C++ and I want to pick up some good habits. If I have just allocated an array of type int with the new operator, how can I initialise them all to 0 without looping through them all myself? Should I just use memset ? Is there a “C++” way to do it?
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Check if event exists on element [duplicate]
Is there a way to check if an event exists in jQuery? I’m working on a plugin that uses custom namespaced events, and would like to be able to check if the event is binded to an element or not.
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How to call a method after a delay in Android
...wing method after a specified delay.
In objective c there was something like:
31 Answers
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How to execute a file within the python interpreter?
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answered Jun 22 '09 at 15:08
S.LottS.Lott
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