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MD5 algorithm in Objective-C
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md5 is available on the iPhone and can be added as an addition for ie NSString and NSData like below.
MyAdditions.h
@interface NSString (MyAdditions)
- (NSString *)md5;
@end
@interface NSData (MyAdditions)
- (NSString*)md5;
@end
MyAdditions.m
#import "MyAdditions.h"
#import &...
Calling closure assigned to object property directly
... be able to call a closure that I assign to an object's property directly without reassigning the closure to a variable and then calling it. Is this possible?
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what exactly is device pixel ratio?
...s length. Source: CSS Absolute Lengths
This has lots of implications when it comes to web design, such as preparing high-definition image resources and carefully applying different images at different device pixel ratios. You wouldn't want to force a low-end device to download a very high resolutio...
How to list all users in a Linux group?
... pam-pgsql, etc.).
If I absolutely had to do this myself, I'd probably do it in reverse: use id to get the groups of every user on the system (which will pull all sources visible to NSS), and use Perl or something similar to maintain a hash table for each group discovered noting the membership of t...
Exotic architectures the standards committees care about
...cts of the language implementation-defined just because if there is an architecture with other characteristics, it would be very difficult or impossible to write a standard conforming compiler for it.
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What does [].forEach.call() do in JavaScript?
...f code, and I found multiple elements calling a function over a node list with a forEach applied to an empty array.
12 Answ...
What is the difference between Google App Engine and Google Compute Engine?
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App Engine is a Platform-as-a-Service. It means that you simply deploy your code, and the platform does everything else for you. For example, if your app becomes very successful, App Engine will automatically create more instances to handle the increased volume.
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Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
...the end of this answer)
Consider this code:
String s = null;
Console.WriteLine(s.Length);
This will throw a NullReferenceException in the second line and you want to know why .NET doesn't tell you that it was s that was null when the exception was thrown.
To understand why you don't get that ...
Using Case/Switch and GetType to determine the object [duplicate]
If you want to switch on a type of object, what is the best way to do this?
10 Answers
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Is there a simple way to remove multiple spaces in a string?
...follow
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edited Jan 4 '19 at 14:59
Francisco Couzo
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