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Invalid argument supplied for foreach()
...ue)
{
...
}
}
The reason for my preference is it doesn't allocate an empty array when you've got nothing to begin with anyway.
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How do I generate a stream from a string?
... This is very compact syntax but it's going to cause a lot of allocations of byte[] so beware in high performance code.
– michael.aird
Mar 19 '17 at 19:08
1
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Current location permission dialog disappears too quickly
...e was like this.
CLLocationManager *locationManager = [[CLLocationManager alloc] init];
[locationManager startUpdatingLocation];
CLLocation *location = locationManager.location;
//my stuff with the location
[locationManager release];
Now the location alert disppeared quickly.
When I uncomme...
From Arraylist to Array
...te array that is big enough to put all elements. In this case it is not re-allocated.
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The simplest way to resize an UIImage?
...dited. I'll just leave the caution that my code that uses this generates malloc errors elsewhere without an additional retain, which is clearly my fault somehow :-).
– Paul Lynch
May 23 '10 at 6:29
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Print a list in reverse order with range()?
... in general but it accepts range. Why would reversed(range(10000)) need to allocate memory for the whole list? range can return an object that implements the __reversed__ method that allows efficient reverse iteration?
– avmohan
Aug 5 '17 at 10:45
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How to customize the background color of a UITableViewCell?
...ll's background is panted yellow:
UIView* backgroundView = [ [ [ UIView alloc ] initWithFrame:CGRectZero ] autorelease ];
backgroundView.backgroundColor = [ UIColor yellowColor ];
cell.backgroundView = backgroundView;
for ( UIView* view in cell.contentView.subviews )
{
view.backgroundColor =...
Suppressing deprecated warnings in Xcode
...ith blocks of code:
SILENCE_IOS7_DEPRECATION(
view = [[MKPolylineView alloc] initWithPolyline:self];
view.lineWidth = self.lineWidth;
view.strokeColor = self.color;
);
Also, when you do drop support for pre-iOS 7 devices, you can easily search through the code to find the deprecated u...
What are all the common ways to read a file in Ruby?
...asuring in gigabytes, and your host is freezing up as it tries to read and allocate memory.
Line-by-line I/O is very fast, and almost always as effective as slurping. It's surprisingly fast actually.
I like to use:
IO.foreach("testfile") {|x| print "GOT ", x }
or
File.foreach('testfile') {|x|...
Javascript swap array elements
...sion is likely inefficient as it is generating a new and unnecessary array allocation.
– Chris_F
Jul 12 at 23:53
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