Is it possible to have an array of arithmetic operators in Swift? Something like:
var operatorArray = ['+', '-', '*', '/'] // or =[+, -, *, /] ?
I just want to randomly generate numbers and then randomly pick an arithmetic operator from the array above and perform the equation. For example,
var firstNum = Int(arc4random_uniform(120))
var secondNum = Int(arc4random_uniform(120))
var equation = firstNum + operatorArray[Int(arc4random_uniform(3))] + secondNum //
Will the above 'equation' work?
Thank you.
It will - but you need to use the operators a little differently.
Single operator:
// declare a variable that holds a function
let op: (Int,Int)->Int = (+)
// run the function on two arguments
op(10,10)
And with an array, you could use map to apply each one:
// operatorArray is an array of functions that take two ints and return an int
let operatorArray: [(Int,Int)->Int] = [(+), (-), (*), (/)]
// apply each operator to two numbers
let result = map(operatorArray) { op in op(10,10) }
// result is [20, 0, 100, 1]
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