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Getting time elapsed in Objective-C
...iaTime() if you need an accurate time interval.
Objective-C:
#import <QuartzCore/QuartzCore.h>
CFTimeInterval startTime = CACurrentMediaTime();
// perform some action
CFTimeInterval elapsedTime = CACurrentMediaTime() - startTime;
Swift:
let startTime = CACurrentMediaTime()
// perform ...
How to create a .NET DateTime from ISO 8601 format
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it seems this question was edited to reflect a better answer but since @MamtaD overwrote the original answer, the comments become very misleading. At the beginning I was not sure that the answer is correct due to the comments on top but th...
how to debug the js in jsfiddle
...l.net folder of the Sources tab of Chrome. You can add breakpoints to the index file shown in the Chrome screenshot below.
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C# equivalent to Java's charAt()?
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You can index into a string in C# like an array, and you get the character at that index.
Example:
In Java, you would say
str.charAt(8);
In C#, you would say
str[8];
...
Reuse a parameter in String.format?
...l, character, and numeric types have the following syntax:
%[argument_index$][flags][width][.precision]conversion
The optional argument_index is a decimal integer indicating the position of the argument in the argument list. The first argument is referenced by "1$", the second by "2$", et...
get the latest fragment in backstack
...hen you added the Fragment to the backstack with addTobackStack(tag).
int index = getActivity().getFragmentManager().getBackStackEntryCount() - 1
FragmentManager.BackStackEntry backEntry = getFragmentManager().getBackStackEntryAt(index);
String tag = backEntry.getName();
Fragment fragment = getFrag...
How to create a fixed-size array of objects
...tried both: 1) sprites[0] = spritePawn and 2) sprites.insert(spritePawn, atIndex:0).
– Henri Lapierre
Jun 24 '14 at 20:23
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A beginner's guide to SQL database design [closed]
...ure that every column that you do "where column = val" in any query has an index. Maybe not the most perfect index in the world for the data type, but at least an index.
Set up your foreign keys. Also set up ON DELETE and ON MODIFY rules where relevant, to either cascade or set null, depending on yo...
CSS: Set a background color which is 50% of the width of the window
...n position even when your users scroll. You may have to fiddle with some z-indexes later, to make sure your other elements are above the background div, but it shouldn't be too complex.
If you have issues, just make sure the rest of your content has a z-index higher than the background element and ...
Java regex capturing groups indexes
...is defined to be group number 0.
Any capturing group in the pattern start indexing from 1. The indices are defined by the order of the opening parentheses of the capturing groups. As an example, here are all 5 capturing groups in the below pattern:
(group)(?:non-capturing-group)(g(?:ro|u)p( (neste...