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What is a NullPointerException, and how do I fix it?
...y happens when using . to access a method or field, or using [ to index an array.
If you attempt to dereference num BEFORE creating the object you get a NullPointerException. In the most trivial cases, the compiler will catch the problem and let you know that "num may not have been initialized," but...
Restful way for deleting a bunch of items
... you think about the list of entities as an entity itself (even if of type array), sending a partial array (only the ids you want to update) of partial entities, then you can leave out the query string, thus not having an URL representing more than one entity.
– Szabolcs Páll
...
Has Facebook sharer.php changed to no longer accept detailed parameters?
...ver, such as php-sdk/
require_once('php-sdk/facebook.php');
$config = array(
'appId' => 'YOUR_APP_ID',
'secret' => 'YOUR_APP_SECRET',
'allowSignedRequest' => false // optional but should be set to false for non-canvas apps
);
$facebook = new Facebook($config);
$user_...
Ignore invalid self-signed ssl certificate in node.js with https.request?
...
Lelo: brackets turn it into an array. ca: expects an array of certs. This file should be a comma separated list of certs, often people use an inner function to turn a PEM file into an array. For a self signed cet a single cert "should" work.
...
Left Align Cells in UICollectionView
...esentedElementCategory == .cell else {
return
}
Objective-C:
- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect {
NSArray *attributes = [super layoutAttributesForElementsInRect:rect];
CGFloat leftMargin = self.sectionInset.left; //initalized to silence compiler, and actaul...
Weighted random numbers
..."in order" you are purposely omitting a pre-sort step on the choice_weight array, yes?
– SilentDirge
Oct 31 '11 at 19:17
2
...
Replacing a char at a given index in string? [duplicate]
... @Jason94, I'm not sure this is more efficient than using ToCharArray as in Jon's answer, you should run tests to see which one is faster.
– Thomas Levesque
Feb 20 '12 at 20:18
...
Uses of Action delegate in C# [closed]
...
MSDN says:
This delegate is used by the
Array.ForEach method and the
List.ForEach method to perform an
action on each element of the array or
list.
Except that, you can use it as a generic delegate that takes 1-3 parameters without returning any value.
...
Histogram Matplotlib
...
@CMCDragonkai: plt.bar's width parameter can accept an array-like object (instead of a scalar). So you could use width = np.diff(bins) instead of width = 0.7 * (bins[1] - bins[0]).
– unutbu
Sep 9 '16 at 14:54
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Android: How do I get string from resources using its name?
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@Sameer to get a array by Strings just use: res.getStringArray(R.array.planets_array); Take a look at this oficial link: developer.android.com/guide/topics/resources/…
– leonvian
Aug 16 '13 at 21:12
...