iOS 9 Programming Fundamentals with Swift Quotes

“The existence of external names doesn’t mean that the call can use a different parameter order from the declaration. For example, our repeatString expects a String parameter and an Int parameter, in that order. The order can’t be different in the call, even though the label might appear to disambiguate which argument goes with which parameter. (Later, though, I’ll give an apparent exception to this rule.)”
― Matt Neuburg, iOS 9 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics

“The fact that functions have types will be of great importance later on.”
― Matt Neuburg, iOS 9 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics

“A call to a function that returns no value is made purely for the function’s side effects; it has no useful return value that can be made part of a larger expression, so it will usually be the only thing in its line of code, with the () value that it returns being ignored. Nevertheless, it is legally possible to capture that value in a variable typed as Void;”
― Matt Neuburg, iOS 9 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics

“These names do not magically make their way to the function. Their values are all that matter; their values are the arguments.”
― Matt Neuburg, iOS 9 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics

“The parameter declaration is, indeed, a kind of variable declaration: we are declaring variables x and y for use inside this function.”
― Matt Neuburg, iOS 9 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics

“Observe that these names, x and y, are arbitrary and purely local (internal) to this function. They are different from any other x and y that may be used in other functions or at a higher level of scope.”
― Matt Neuburg, iOS 9 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics

“Much of the art of object-based programming turns out to be exactly here, in giving instances a sufficient lifetime and making them visible to one another.”
― Matt Neuburg, iOS 9 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics