scan Array for condition, return indexes to scan Array2 values at said indexes

Question

I have two arrays

var Status: [Int] = [0,1,0,1,1] //which will contain at random a 0 or 1 at all five index

var Total: [Int] = [0,85,90,90,0] //which will contain any positive Int at all five index

I want to write a func that will scan Status and return only the indexes which contain a 1.

Then scan Total at these same indexes to see if the Ints are equal

In this case indexes 1,3,4 would be returned from Status scan, and Total would be scanned at [1,3,4] to return 85,90,0.

So something like this if I could come up with the correct syntax

var Status: [Int] = [0,1,1,1,1]

var Total: [Int] = [3,4,16,2,3]

var IndexesToCompare: [Int] = [Int]()

Status.scan for value '1', return indexes to IndexesToCompare

var TotalsToCompare: [Int] = [Int]()

Total.scan @Index[IndexesToCompare], return values to TotalsToCompare

if TotalsToCompare.scanIfAllIntegarsAreEqual == true {println("EQUAL")} else {println("Unequal")}

This would print out "Unequal", but if Status were changed to [1,0,0,0,1] it would print out "EQUAL"

boidkan · Accepted Answer · 2015-03-24 15:02:46Z

1

If I understand what you want. You want to look at Status and find all the 1's and with those get the corresponding values in Total. Then with those values find the average value and then compare that to each individual value. If all the values equal the average then return true else false. I'm assuming the the function has access to Status and Total and that they are the same size. Returns true if all the values are the same and false if they are not.

func yourFunc()->Bool{
    var values = [Int]()
    for index in 0..<Status.count{//loop through Status
        if Status[index] == 1{//when you find a 1
            //append it's corresponding value in Total to values
            values.append(Total[index])
        }
    }
    var average = values.reduce(0,+)/values.count
    for value in values{
        if value != average{
            return false
        }
    }
    return true
}

Note: I personally only like to capitalize Classes and not variables as convention.

edited Mar 24, 2015 at 15:02

answered Mar 23, 2015 at 23:21

boidkan

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5 Comments

Chameleon Over a year ago

this works for returning all Total values that matched to Status's 1's, so here it would return [4,16,2,3]...but how do I test values to see if all members are equal or not?

Chameleon Over a year ago

basically i want to know when values is [90,90,90] or [85,85] or [0,0,0,0,0]

boidkan Over a year ago

Look at the edit. Second loop looks at the values and returns false if one of them doesn't match.

rdelmar Over a year ago

You could also use the half open range operator, "for index in 0..<Status.count" instead of "for index in 0...Status.count-1"

Chameleon Over a year ago

needs to be var average = values.reduce(0,+)/values.count and are index and value specific terms or can they be total ambiguous variable identifiers?

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