function Item(coordinates){
this.coordinates = coordinates || false;
this.moveItemToAValueBelow = function(value){
for (var i in this.coordinates){
this.coordinates[i][1]+=value;
}
}
}
var first = new Item(data);
var second = new Item(data);
second.moveItemToAValueBelow(20);
console.log(first.coordinates);
console.log(second.coordinates);
function cloneArray(array){
var result = [];
for (var i in array) {
if (array[i] === undefined) continue;
result[i] = array[i].length ? cloneArray(array[i]) : array[i];
}
return result;
}
var data = [[10,10], [0,30], [20,30], [10,10]];
var array1 = cloneArray(data);
var array2 = cloneArray(data);
function clone(obj) {
if (null == obj || "object" != typeof obj) return obj;
var copy = obj.constructor();
for (var attr in obj) {
if (obj.hasOwnProperty(attr)) copy[attr] = obj[attr];
}
return copy;
}
this.coordinates = clone(coordinates);