Author: Angelo Villegas
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Swift: Protocols
In Objective-C, you are allowed to define protocols which declare the methods expected to be used for a particular situation. In t, protocols are basically a named contract that your types should conform to. If your type says it conforms to Equatable, then it better fulfil all of the required methods to make it equatable. Protocol A protocol defines the body of methods, properties, and other requirements…
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Swift: Operator Declaration
The Swift standard library defines a number of operators, many of which are available to most programming languages. The most familiar operators that will come to mind are the MDAS operators’ *, /, +, – respectively. Operators such as these are very simple to use and remember that it was thought ever since we were kids. But not all operators are easy to remember, not all…
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Swift: Range Operators
Swift includes two range operators, closed range and half-closed range, which are shortcuts for expressing a range of values. Range operators are most commonly used with the for loop. In Objective-C, we have 2 different for loops, the traditional loop and iteration-based loop. Traditional For Loop The traditional for loop found in C requires 3 parts: the initialisation, the condition, and the loop expression. The initialisation declares (and perhaps…
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iOS: Data Protection
iOS is based on the same core technologies as OS X, and benefits from years of hardening and security development. According to Apple’s iOS Security Guide, iOS security can be viewed in four layers: iOS devices provide full hardware encryption of all data stored on the device. The System architecture includes both software and hardware used to protect files…
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iOS: NSLayoutConstraint
With the release of Xcode 5 and iOS 7 the need to learn, understand, and use auto layout increased. Auto layout were introduced in iOS 6.0; with auto layout, it is easier to design the interface for multiple screen sizes and also for multiple languages (e.g., Arabic, Japanese, Chinese, etc…). It’s not hard to design a user interface for a screen that is always guaranteed to be the same size and…
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NSDate & NSDateFormatter
One of the commonly used classes in building iOS apps are the NSDate (which allows us to deal with dates) and, of course, NSDateFormatter (which allows us to format the date and time to be printed). It is very likely that somewhere in your app, you may need to work with a lot of dates…
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Let’s try Ruby in 30 minutes
A Brief History Ruby is a dynamic, reflective, object-oriented, general-purpose programming language. It was designed and developed in the mid-1990s by Yukihiro “Matz” Matsumoto in Japan. Ruby syntax is inspired by Perl with Smalltalk-like features and was also influenced by Eiffel and Lisp. It supports multiple programming paradigms, including functional, object oriented, and imperative. It…
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Clang Language Extensions: instancetype
Objective-C is a rapidly evolving language faster than many other. ARC, object literals, subscripting, blocks: in the span of just three years, this is just an example of how fast it grows. One of the latest addition to ObjC is instancetype. Clang adds a keyword instancetype that, as far as I can see, replaces id…
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Shell: Generate Git
A comprehensive script for Xcode projects that lets you generate .gitignore and .gitattributes in the directory of your choosing. Download You can grab the script here: https://gist.github.com/anjerodesu/5063843 Running the script