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REUSABILITY of an ALREADY ALLOCATED OBJECT.

Reusability of an already allocated object.

DELEGATES are a design pattern. A delegate is just an object that another object sends MESSAGES to when CERTAIN things HAPPEN.

Delegates are a design pattern. A delegate is just an object that another object sends messages to when certain things happen.

MVC is a design pattern that stands for Model View CONTROLLER. This design pattern separates the data from its display, MEDIATED by a View Controller.

MVC is a design pattern that stands for Model View Controller. This design pattern separates the data from its display, mediated by a View Controller.

A synchronous function returns only after the completion of a task that it ORDERS.

An ASYNCHRONOUS function, on the other HAND, returns immediately, ORDERING the task to be DONE, but not waiting for it.

A synchronous function returns only after the completion of a task that it orders.

An asynchronous function, on the other hand, returns immediately, ordering the task to be done, but not waiting for it.

GCD is the most COMMONLY used API to manage concurrent code and execute operations asynchronously at the UNIX level of the SYSTEM. GCD provides and MANAGES queues of TASKS.

GCD is the most commonly used API to manage concurrent code and execute operations asynchronously at the UNIX level of the system. GCD provides and manages queues of tasks.

The GUARD statement evaluates a Boolean CONDITION and PROCEEDS with program execution if the evaluation is true.

The guard statement evaluates a Boolean condition and proceeds with program execution if the evaluation is true.

The LET KEYWORD is used to DECLARE constants, while var is used for DECLARING variables.

The let keyword is used to declare constants, while var is used for declaring variables.

To PROVIDE a DEFAULT VALUE for a VARIABLE.

To provide a default value for a variable.

The QUESTION mark (?) is USED during the declaration of a PROPERTY. It TELLS the compiler that this property is OPTIONAL and whether the property may hold a value or not.

The question mark (?) is used during the declaration of a property. It tells the compiler that this property is optional and whether the property may hold a value or not.

It supports any kind of DATA and not only Synchronizes it, but ALSO checks for equality. The SWITCH statement MUST be EXHAUSTIVE, which means that you have to cover all possible values for your variable.

It supports any kind of data and not only Synchronizes it, but also checks for equality. The Switch statement must be exhaustive, which means that you have to cover all possible values for your variable.

Control transfer statements USED in SWIFT INCLUDE −

• Break
• CONTINUE
• Fallthrough
• Return

Control transfer statements used in Swift include −

Multiple LINE comments can be written as FORWARD-slash FOLLOWED by an ASTERISK (/*) and END with an asterisk followed by a forward slash (*/).

Multiple line comments can be written as forward-slash followed by an asterisk (/*) and end with an asterisk followed by a forward slash (*/).

Multiple line COMMENTS can be WRITTEN as forward-SLASH followed by an asterisk (/*) and end with an asterisk followed by a forward slash (*/).

Multiple line comments can be written as forward-slash followed by an asterisk (/*) and end with an asterisk followed by a forward slash (*/).