How do you find a maximum value in a Swift dictionary?

Question

So, say I have a dictionary that looks like this:

var data : [Float:Float] = [0:0,1:1,2:1.414,3:2.732,4:2,5:5.236,6:3.469,7:2.693,8:5.828,9:3.201] 

How would I programmatically find the highest value in the dictionary? Is there a "data.max" command or something?

Answer 1

let maximum = data.reduce(0.0) { max($0, $1.1) } 

Just a quick way using reduce.

or:

data.values.max() 

Output:

print(maximum) // 5.828 

Answer 2

A Swift Dictionary provides the max(by:) method. The Example from Apple is as follows:

let hues = ["Heliotrope": 296, "Coral": 16, "Aquamarine": 156] let greatestHue = hues.max { a, b in a.value < b.value } print(greatestHue) // Prints "Optional(("Heliotrope", 296))"