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function Set() {
this.dataStore = [];
this.add = add;
this.remove = remove;
this.size = size;
this.union = union;
this.contains = contains;
this.intersect = intersect;
this.subset = subset;
this.difference = difference;
this.show = show;
}
function add(data) {
if (this.dataStore.indexOf(data) < 0) {
this.dataStore.push(data);
return true;
} else {
return false;
}
}
function remove(data) {
var pos = this.dataStore.indexOf(data);
if (pos > -1) {
this.dataStore.splice(pos,1);
return true;
} else {
return false;
}
}
function size() {
return this.dataStore.length;
}
function show() {
return "[" + this.dataStore + "]";
}
function contains(data) {
if (this.dataStore.indexOf(data) > -1) {
return true;
} else {
return false;
}
}
function union(set) {
var tempSet = new Set();
for (var i = 0; i < this.dataStore.length; ++i) {
tempSet.add(this.dataStore[i]);
}
for (var i = 0; i < set.dataStore.length; ++i) {
if (!tempSet.contains(set.dataStore[i])) {
tempSet.dataStore.push(set.dataStore[i]);
}
}
return tempSet;
}
function intersect(set) {
var tempSet = new Set();
for (var i = 0; i < this.dataStore.length; ++i) {
if (set.contains(this.dataStore[i])) {
tempSet.add(this.dataStore[i]);
}
}
return tempSet;
}
function subset(set) {
if (this.size() > set.size()) {
return false;
} else {
for (var member in this.dataStore) {
if (!set.contains(member)) {
return false;
}
}
}
return true;
}
function difference(set) {
var tempSet = new Set();
for (var i = 0; i < this.dataStore.length; ++i) {
if (!set.contains(this.dataStore[i])) {
tempSet.add(this.dataStore[i]);
}
}
return tempSet;
}
var cis = new Set();
var it = new Set();
cis.add("Clayton");
cis.add("Jennifer");
cis.add("Danny");
it.add("Bryan");
it.add("Clayton");
it.add("Jennifer");
var diff = new Set();
diff = cis.difference(it);
console.log(cis.show() + " difference " + it.show() + " -> " + diff.show());
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