How do i check if multiple values are the same?

Question

I am creating a little emoji slot machine app as recommended in one of the tasks. I have got it to where my app generates 3 random emojis from an array but I was wondering how I could check to see if these 3 values are equal?

Answer 1 · 2015-01-13T12:10:16Z

January 13, 2015 12:10pm

Hi Luke,

The most simple way I can think of is to run a for loop over an array and count each selection as I've done in the below example, to do this I've done the following.

Created a new dictionary called counters
Check if the selection exists in the dictionary, if not assign each selection via the for loop
Increment the count of the selection by 1
Finally check if the selection has a total count of 3, if it is set the winner variable to true

The rest of the code is pretty self explanatory.

var selections = ["Test", "Test", "Test"]
var counters = [String: Int]()
var winner = false

// Count each selection and store it's overall count in a new dictionary
for selection in selections {
    // Check if the selection exists in the dictionary, if it doesn't set it's default value to 0
    if !contains(counters.keys, selection) {
        counters[selection] = 0
    }

    // Increment the count for the selection
    counters[selection]!++

    // Check if the count for the selection equals 3, if it does we have a winner
    if counters[selection] == 3 {
        winner = true
        break
    }
}

// Do we have a winner?
if winner {
    println("We have a winner, nice one.")
} else {
    println("You've lucked out!")
}

Hope that helps.

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Luke Telford

Luke Telford

How do i check if multiple values are the same?

1 Answer

Chris Shaw

Chris Shaw