syntax of closures
/*
{ (parameters) -> return type in
body
}
*/
var numbers = [1, 2, 3, 4]
var reversed = numbers.sorted(by: {(a: Int, b: Int) -> Bool in
return a > b
})syntax of closures
/*
{ (parameters) -> return type in
body
}
*/
var numbers = [1, 2, 3, 4]
var reversed = numbers.sorted(by: {(a: Int, b: Int) -> Bool in
return a > b
})closures
{ (parameters) -> returnType in
// statements
}A closure Function
var returns_a_func = function () {
var word = 'I can see inside ' function sentence(){ var word2 = 'I can also see outside. ' console.log(word + 'and ' + word2) } return sentence;
}var finalSentence = returns_a_func()finalSentence()A closure Function
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