# How many ways can I make a point?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141   // how many ways can I make a point?   // 1) function Point(x, y, z) { this.x = x; this.y = y; this.z = z; } Point.prototype.offset = function(tx, ty, tz) { this.x += tx; this.y += ty; this.z += tz; }; Point.prototype.add = function(point) { this.offset(point.x, point.y, point.z); }; Point.prototype.subtract = function(point) { this.x -= point.x; this.y -= point.y; this.z -= point.z; }; Point.prototype.clone = function() { return new Point(this.x, this.y, this.z); };   var one = new Point(10, 10, 10);   // 2) function Point(x, y, z) { this.x = x; this.y = y; this.z = z; } Point.prototype = { constructor: Point, offset: function(tx, ty, tz) { this.x += tx; this.y += ty; this.z += tz; }, add: function(point) { this.offset(point.x, point.y, point.z); }, subtract: function(point) { this.x -= point.x; this.y -= point.y; this.z -= point.z; }, clone: function() { return new Point(this.x, this.y, this.z); } };   var two = new Point(10, 10, 10);   // 3) function Point(x, y, z) { this.x = x; this.y = y; this.z = z; this.offset = function(tx, ty, tz) { this.x += tx; this.y += ty; this.z += tz; }; this.add = function(point) { this.offset(point.x, point.y, point.z); }; this.subtract = function(point) { this.x -= point.x; this.y -= point.y; this.z -= point.z; }; this.clone = function() { return new Point(this.x, this.y, this.z); }; }   var three = new Point(10, 10, 10);   // 4) function Point(x, y, z) { var self = { x: x, y: y, z: z, offset: function(tx, ty, tz) { self.x += tx; self.y += ty; self.z += tz; }, add: function(point) { self.offset(point.x, point.y, point.z); }, subtract: function(point) { self.x -= point.x; self.y -= point.y; self.z -= point.z; }, clone: function() { return Point(self.x, self.y, self.z); } }; return self; };   var four = Point(10, 10, 10); // note no new keyword   // 5) this is one way to use Object.create() (lots of other ways) var Point = { x: 0, y: 0, z: 0, init: function(x, y, z) { this.x = x; this.y = y; this.z = z; return this; }, offset: function(tx, ty, tz) { this.x += tx; this.y += ty; this.z += tz; }, add: function(point) { this.offset(point.x, point.y, point.z); }, subtract: function(point) { this.x -= point.x; this.y -= point.y; this.z -= point.z; }, clone: function() { return Object.create(Point).init(this.x, this.y, this.z); } };   var five = Object.create(Point).init(10, 10, 10);   // There are a bunch more ways, especially when you introduce javascript libraries.