javascript_lab_day10.js

// //lab 1
// Write a function called printMulti that takes an array of arrays, such as:
// var my_array = [[2,3,4], ["Hello CodeCore", 1, true]];
// and prints every element to the console.

var my_array = [[2,3,4], ["Hello CodeCore", 1, true]];

function printArray(arr){
    
    if(arr.length == 0){
        return;
    }
    
    else if (arr.constructor !== Array){
      console.log(arr);   
      return arr;
    }
    
    else{
        printArray(arr[0]);
    }
    
    printArray(arr.slice(1,arr.length));
}

printArray(my_array);

// //lab2
// Write a JavaScript function to merge two arrays and removes all duplicates elements. For example:
// var array1 = [1, 2, 3];
// var array2 = [3,4,5];
// console.log(merge(array1, array2));
// [1,2,3,4,5]

function addValueToObject(arr, obj){
  for(var a = 0; a < arr.length; ++a){
      
        var value = arr[a];
        
        if(obj[value] === undefined){
            obj[value] = 0;
        }
        obj[value] += 1;
    }
    return obj;
}

function mergeArray (arr1, arr2){
    
    var result = {};
    var mergedArray = [];
    
    // for(var a = 0; a < arr1.length; ++a){
    //     var value = arr1[a];
    //     if(result[value] === undefined){
    //         result[value] = 0;
    //     }
    //     result[value] += 1;
    // }
    
    // for(var a = 0; a < arr2.length; ++a){
    //     var value = arr2[a];
    //     if(result[value] === undefined){
    //         result[value] = 0;
    //     }
    //     result[value] += 1;
    // }
    
    addValueToObject(arr1, result);
    addValueToObject(arr2, result);
    
    for(var c in result){
     mergedArray.push(c);
    }
    return mergedArray;
}

mergeArray([1,2,3,4,5,6,7], [2,3,4,5,6,7,8]);

// lab 3. Write a function called largestNumber that takes from an array of numbers the largest number.
function getLargestNum(arr){
    var largest = arr[0];
    
    for(var i = 1; i<arr.length; ++i){
        if(arr[i] > largest){
            largest = arr[i];
        }
    }
    
    return largest;
}

getLargestNum([7,6,5,4,8,8,1]);

// Assignment: [lab] Card Shuffling Next Module

// Create a javascript object that stores deck of cards. 

// - Add a print method on it that will print the cards in order.
// - Add a method shuffle that will shuffle the cards
// - Add a randomCard method that give your a random card from your collection

var deck = {};

function initializeDeck(deck) {
    for(var i = 1; i < 14; i++){
        deck[i] = i+'Spade';
        deck[i + 13] = i + 'Heart';
        deck[i + 13*2] = i + 'Club';
        deck[i + 13*3] = i + 'Diamond';
    }
}

function printDeck(deck){
        for (var d in deck){
        console.log(deck[d]);
    }
}

function shuffle(deck){
    var resultDeck = {};
    
    for(var x in deck){
        resultDeck[x] = deck[x];
    }
    
// -- To shuffle an array a of n elements (indices 0..n-1):
// for i from n−1 downto 1 do
//      j ← random integer such that 0 ≤ j ≤ i
//      exchange a[j] and a[i]
    
    
 for(var i = 52; i > 1; --i){
     var j = Math.floor(Math.random()*i + 1);
   //  console.log("i is " + i + "; j is "+ j );
     var temp = resultDeck[i];
     resultDeck[i] = resultDeck[j];
     resultDeck[j] = temp;
 }
 
 return resultDeck;
}

function randomCard(deck){
var randy =  Math.floor(Math.random()*52 + 1);
var card = deck[randy];
    console.log("your random card is " + card);
    return card;
}

var deck = {};
initializeDeck(deck);