Daily Challenge Nov 27

gistfile1.txt

Assumptions: I don't have any assumptions. It seems to be pretty straightforward.

Test Cases.

[-2, 3, 10, 11]
[3, 2, 1]
[1, 2, 3]
[2, 2, 5, 4]

Approach:

I will create four variables, one an empty array and the other three integers. I will create a for loop that goes through each
index of the array provided by the user. I will save the first index into one of the integer variables, then I will use either 
an if statement to check if the next index is greater than the first. If so it will be saved into a new variable. I will then
check for the third element in the pattern in the same way and save into a new variable. I will then add the variables' values 
to the empty array.

Code:

func checkForPattern (integerArray: [Int]) -> Bool? {
    var pattern = true
    if integerArray.count < 3 {
        pattern = false
    }
    
    else {
    for index in integerArray {
        if integerArray[index] < integerArray[index].advanced(by: 1) && integerArray[index].advanced(by: 1) > integerArray[index].advanced(by: 2) {
            pattern = true
            break
        } else {
            pattern = false
        }
    }
    }
    return pattern
}
checkForPattern(integerArray: [1, 3, 2, 5, 4])