Swift example

/*
    There is no Swift syntax highlighting on pastebin yet :(

    Defining functions is pretty nasty.  (variableName: valueType) (in this case, [Int] means an array containing integers)

    You also have to define the return type after the arrow.  [Int : Bool] means the function will return a dictionary with
    integer keys and bool values.  For example: {1 : true, 5 : false}
*/

func arrayContains(search: [Int], match: [Int]) -> [Int : Bool] {
    var container = [Int : Bool]()          //define a dictionary with integer keys and bool values, this dictionary will be returned
    for number in match {                   //iterate through the match array, set each number as a key in 'container' and set it to false
        container[number] = false
    }
    for element in search {                 //iterate through the array you're searching
        for compare in match {              //also iterate through the comparison array so we can compare
            if compare == element {         //if they match
                container[compare] = true   //set the value of the key to true
            }
        }
    }
    return container
}

let test = arrayContains([5, 9], [5, 9, 10])

println(test)

/*
    5: true (found in the search array)
    9: true (found in the search array)
    10: false (not found in the search array)
*/