Tag: syntax
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Initializer syntax in Swift
Initializers are called to create new instance of particular type.They are like instance method without parameter name written using init keyword.
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What are trailing closures in Swift?
When we have a long closure expression as a final argument to a function, then we can write the closure expression outside the function parentheses even though it is part of function call. Such closures are called trailing closures. When we us trailing closure, we don’t have to use the argument label for the closure […]
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Closure expression syntax in Swift
Closure expression syntax: { (parameters) -> <return type> in <statements to be executed> } The parameters of closure expression can be of any type such as tuples, in-out parameters, variadic parameters with a name. The parameters cannot have a default value. The in keyword indicates that the declaration pf parameters and return type pf closure expression is […]
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What are the syntax rules for JSON data?
JSON syntax is derived from javascript syntax. JSON Syntax: Data must be in name: value pairs Data must be separated by commas Objects are held between curly braces. Arrays are held between square brackets. File type for JSON file is ‘.json’ MIME type for JSON text is ‘application/json’ In JSON, the values must be of […]
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Swift: Accessing properties of structure and classes
We can access the properties inside structure and class using the dot syntax. This is done by writing the name of the instance followed by a dot and then the name of the property or method to be accessed.
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Swift: Structure and Class Syntax
Structures and Classes have similar syntax definition. We create structures using the struct keyword and classes using the class keyword. As structures and classes are new Swift type, we use upperCamelCase for their names. The property and method names defined inside them have to be in lowerCamelCase.