如何在数组元素的每个数组后附加字符串

Question

我有一个包含字符串的数组数组。前-

array = [["to play","to learn"],["to eat"]]

我有：

string = "I like"

我想将字符串附加到数组中的每个元素喜欢-

array = [["I like to play","I like to learn"],["I like to eat"]]

Answer 1

var prefix = "I like "

let array = [["to play","to learn"],["to eat"]]

let temp = array.map { $0.map { prefix + $0 } }