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loianeloiane
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added chapter 02
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‎chapter02/01-Introduction.html

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title></title>
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</head>
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<body>
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<script type="text/javascript" src="01-Introduction.js"></script>
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</body>
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</html>

‎chapter02/01-Introduction.js

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var averageTempJan = 31.9;
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var averageTempFeb = 35.3;
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var averageTempMar = 42.4;
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var averageTempApr = 52;
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var averageTempMay = 60.8;
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averageTemp[0] = 31.9;
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averageTemp[1] = 35.3;
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averageTemp[2] = 42.4;
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averageTemp[3] = 52;
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averageTemp[4] = 60.8;

‎chapter02/02-CreatingAndInitialingArrays.html

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title></title>
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</head>
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<body>
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<script type="text/javascript" src="02-CreatingAndInitialingArrays.js"></script>
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</body>
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</html>

‎chapter02/02-CreatingAndInitialingArrays.js

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var daysOfWeek = [];
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var daysOfWeek = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
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var daysOfWeek = new Array(); //{1}
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var daysOfWeek = new Array(7); //{2}
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console.log(daysOfWeek.length);
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var daysOfWeek = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'); //{3}
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for (var i=0; i<daysOfWeek.length; i++){
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console.log(daysOfWeek[i]);
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}
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//console.table(daysOfWeek);
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//fibonacci numbers
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// 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...
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var fibonacci = []; //{1}
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fibonacci[0] = 0; //{2}
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fibonacci[1] = 1; //{3}
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for(var i = 2; i < 20; i++){
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fibonacci[i] = fibonacci[i-1] + fibonacci[i-2]; ////{4}
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}
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for(var i = 0; fibonacci.length; i++){ //{5}
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console.log(fibonacci[i]);
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}

‎chapter02/03-AddingRemovingElements.html

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title></title>
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</head>
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<body>
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<script type="text/javascript" src="03-AddingRemovingElements.js"></script>
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</body>
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</html>

‎chapter02/03-AddingRemovingElements.js

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function printArray(myArray) {
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for (var i=0; i<myArray.length; i++){
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console.log(myArray[i]);
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}
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}
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var numbers = [0,1,2,3,4,5,6,7,8,9];
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//add a new element to the numbers array
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numbers[numbers.length] = 10;
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numbers.push(11);
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numbers.push(12, 13);
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//printArray(numbers);
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//insert first position manually
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for (var i=numbers.length; i>=0; i--){
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numbers[i] = numbers[i-1];
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}
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numbers[0] = -1;
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//printArray(numbers);
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//using method unshift
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numbers.unshift(-2);
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//printArray(numbers);
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numbers.unshift(-4, -3);
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//printArray(numbers);
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//**** Removing elements
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numbers.pop();
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//remove first position manually
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/*for (var i=0; i<numbers.length; i++){
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numbers[i] = numbers[i+1];
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}*/
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printArray(numbers);
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console.log(numbers.length);
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//using method shift
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numbers.shift();
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printArray(numbers);
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console.log(numbers.length);
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//**** Removing and Adding elements from the middle of the array or specific position
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//splice method - parameter (index, howManyPositionsToBeRemoved, item1...itemX)
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numbers.splice(5,3);
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console.log('----');
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printArray(numbers);
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numbers.splice(5,0,2,3,4);
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console.log('----');
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printArray(numbers);
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console.log('----');
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numbers.splice(5,3,2,3,4);
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printArray(numbers);

‎chapter02/04-TwoDimensionalMultiDimensional.html

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title></title>
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</head>
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<body>
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<script type="text/javascript" src="04-TwoDimensionalMultiDimensional.js"></script>
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</body>
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</html>

‎chapter02/04-TwoDimensionalMultiDimensional.js

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var averageTempDay1 = [72,75,79,79,81,81];
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var averageTempDay2 = [81,79,75,75,73,72];
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var averageTemp = [];
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//same as
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averageTemp[0] = [72,75,79,79,81,81];
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averageTemp[1] = [81,79,75,75,73,72];
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function printMatrix(myMatrix) {
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for (var i=0; i<myMatrix.length; i++){
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for (var j=0; j<myMatrix[i].length; j++){
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console.log(myMatrix[i][j]);
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}
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}
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}
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printMatrix(averageTemp);
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//same as
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//day 1
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averageTemp[0] = [];
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averageTemp[0][0] = 72;
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averageTemp[0][1] = 75;
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averageTemp[0][2] = 79;
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averageTemp[0][3] = 79;
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averageTemp[0][4] = 81;
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averageTemp[0][5] = 81;
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//day 2
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averageTemp[1] = [];
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averageTemp[1][0] = 81;
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averageTemp[1][1] = 79;
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averageTemp[1][2] = 75;
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averageTemp[1][3] = 75;
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averageTemp[1][4] = 73;
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averageTemp[1][5] = 72;
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printMatrix(averageTemp);
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//** Multidimensional Matrix
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//Matrix 3x3x3 - Cube
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var matrix3x3x3 = [];
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for (var i=0; i<3; i++){
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matrix3x3x3[i] = [];
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for (var j=0; j<3; j++){
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matrix3x3x3[i][j] = [];
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for (var z=0; z<3; z++){
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matrix3x3x3[i][j][z] = i+j+z;
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}
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}
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}
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for (var i=0; i<matrix3x3x3.length; i++){
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for (var j=0; j<matrix3x3x3[i].length; j++){
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for (var z=0; z<matrix3x3x3[i][j].length; z++){
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console.log(matrix3x3x3[i][j][z]);
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}
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}
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}

‎chapter02/05-ArrayMethods.html

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title></title>
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</head>
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<body>
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<script type="text/javascript" src="05-ArrayMethods.js"></script>
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</body>
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</html>

‎chapter02/05-ArrayMethods.js

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//*** contact
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var zero = 0;
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var positiveNumbers = [1,2,3];
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var negativeNumbers = [-3,-2,-1];
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var numbers = negativeNumbers.concat(zero, positiveNumbers);
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//document.writeln(numbers);
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//*** every and some
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var isEven = function (x) {
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// returns true if x is a multiple of 2.
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console.log(x);
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return (x % 2 == 0) ? true : false;
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};
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var numbers = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15];
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numbers.every(isEven); //is going to execute the function only once
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console.log('---');
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numbers.some(isEven); //is going to execute the function twice
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numbers.forEach(function(x){
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console.log((x % 2 == 0));
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});
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document.writeln(numbers.reverse());
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//document.writeln('*** filter ***');
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var evenNumbers = numbers.filter(isEven);
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//document.writeln(evenNumbers);
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document.writeln('*** map ***');
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//document.writeln(numbers.map(isEven));
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document.writeln(numbers.sort());
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document.writeln(numbers.sort(function(a,b){
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return a-b;
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}));
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//*** toString
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console.log(numbers.toString());
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console.log(numbers.indexOf(10));
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console.log(numbers.indexOf(100));
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numbers.push(10);
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console.log(numbers.lastIndexOf(10));
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console.log(numbers.lastIndexOf(100));
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var numbersString = numbers.join('-');
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console.log(numbersString);

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