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How do I run Asynchronous callbacks in Playground
Many Cocoa and CocoaTouch methods have completion callbacks implemented as blocks in Objective-C and Closures in Swift. However, when trying these out in Playground, the completion is never called. For example:
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Java code To convert byte to Hexadecimal
...g.format solution more preferrable.
References
JLS 4.2.1 Integral Types and Values
For byte, from -128 to 127, inclusive
JLS 5.1.2 Widening Primitive Conversion
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When maven says “resolution will not be reattempted until the update interval of MyRepo has elapsed”
...ownload artifact directory in my local repo. Next time I run the maven command the artifact download is triggered again. Therefore I'd say it's a client side setting.
Nexus side (server repo side), this issue is solved configuring a scheduled task.
Client side, this is done using -U, as you alread...
.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,
...of complex data structures. Unfortunately, some of them are quite similar, and I'm not always sure when to use one and when to use another. Most of my C# and Visual Basic books talk about them to a certain extent, but they never really go into any real detail.
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Safe integer parsing in Ruby
I have a string, say '123' , and I want to convert it to the integer 123 .
8 Answers
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Is there any way to view the currently mapped keys in Vim?
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You can do that with the :map command. There are also other variants.
:nmap for normal mode mappings
:vmap for visual mode mappings
:imap for insert mode mappings
The above list is not complete. Typing :help map in Vim will give you more info.
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Are there strongly-typed collections in Objective-C?
I'm new to Mac/iPhone programming and Objective-C. In C# and Java we have "generics", collection classes whose members can only be of the type declared. For example, in C#
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How to instantiate non static inner class within a static method?
...).
If you make your inner class "static" then there is no hidden pointer and your inner class cannot reference members of the outer class. A static inner class is identical to a regular class, but its name is scoped inside the parent.
Here is a snippet of code that demonstrates the syntax for cre...
How to remove trailing whitespace of all files recursively?
...he trailing whitespace of an entire project? Starting at a root directory, and removing the trailing whitespace from all files in all folders.
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The simplest way to resize an UIImage?
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The simplest way is to set the frame of your UIImageView and set the contentMode to one of the resizing options.
Or you can use this utility method, if you actually need to resize an image:
+ (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize {
//UIGraphi...