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Default string initialization: NULL or Empty? [closed]
...nk when I see something like this in our code base:
string msg = Validate(item);
if (msg != null)
{
DisplayErrorMessage(msg);
return;
}
I know that Validate would never return String.Empty, because we write better code than that.
Of course, the rest of the world doesn't work like this. Wh...
Why does the expression 0 < 0 == 0 return False in Python?
...esult_code == 0], before this I had never seen a boolean used to select an item in a list/tuple.
– Andrew Clark
May 20 '11 at 16:24
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How do I detect IE 8 with jQuery?
...
I think the best way would be this:
From HTML5 boilerplate:
<!--[if lt IE 7]> <html lang="en-us" class="no-js ie6 oldie"> <![endif]-->
<!--[if IE 7]> <html lang="en-us" class="no-js ie7 oldie"> <![en...
What is an idempotent operation?
...ed more than once with the same input parameters. For example, removing an item from a set can be considered an idempotent operation on the set.
In mathematics, an idempotent operation is one where f(f(x)) = f(x). For example, the abs() function is idempotent because abs(abs(x)) = abs(x) for all x....
How does View Controller Containment work in iOS 5?
...call willMoveToParentViewController prior to addChildViewController if the item you are moving is a custom class with overridden addChildViewController (unless your override calls it internally)
– bunkerdive
Mar 10 '17 at 17:08
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Convert a string to an enum in C#
What's the best way to convert a string to an enumeration value in C#?
25 Answers
25
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best way to preserve numpy arrays on disk
I am looking for a fast way to preserve large numpy arrays. I want to save them to the disk in a binary format, then read them back into memory relatively fastly. cPickle is not fast enough, unfortunately.
...
Dynamically set local variable [duplicate]
...
You can use a local dictionary and put all the dynamic bindings as items into the dictionary. Then knowing the name of such a "dynamic variable" you can use the name as the key to get its value.
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Change UICollectionViewCell size on different device orientations
... layout:(UICollectionViewLayout *)collectionViewLayout
sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
// Adjust cell size for orientation
if (UIDeviceOrientationIsLandscape([[UIApplication sharedApplication] statusBarOrientation])) {
return CGSizeMake(170.f, 170.f...
When and why should I use fragments in Android applications? [duplicate]
... a webView that takes up the other half - so that when you click on a list item in fragment A it passes an intent to the webView in fragment B, and suddenly you see what you just clicked without the app switching activities - then you could use a fragment. That's just an example I came up with off ...