Codetrotters Fellowship Exercise 2 - Exercise.a: create on Math.max function from an array of numbers; Exercise.b: create a function that takes 2 array of numbers and outputs the numbers in common

ct_fellowship2016_2.js

// Exercise a

var arrayofnums = [1,-5,4,-3,2];

function max(array) {
    var maxNumber = array[0];
    for(var i = 0; i < array.length; i++){
        if (array[i] > maxNumber){
            maxNumber = array[i];
        }
    }
    console.log(maxNumber);
}

max(arrayofnums);


//Exercise b

var a1 = [1,2,3], a2 = [2,3,4];

function intersection(a1, a2){
    var output = [];
    a1.map(function(i){
      a2.map(function(j){
        if(i == j){
            output.push(j);
        }
      })
    })
    console.log(output);
}

intersection(a1, a2);