function Set() {
this.dataStore = [];
};
Set.prototype = {
constructor: Set,
add: function (data) {
if (this.dataStore.indexOf(data) < 0) {
this.dataStore.push(data);
return true;
} else {
return false;
}
},
remove: function(data) {
var pos = this.dataStore.indexOf(data);
if (pos > -1) {
this.dataStore.splice(pos, 1);
return true;
} else {
return false;
}
},
show: function() {
return this.dataStore;
},
contains: function(data) {
if (this.dataStore.indexOf(data) > -1) {
return true;
} else {
return false;
}
},
union: function(set) {
//合集
if (! (set instanceof Set)) {
return;
}
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;
},
intersect: function (set) {
//交集
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;
},
size: function() {
return this.dataStore.length;
},
subset: function (set) {
//判断是否子集
if (this.size() > set.size()) {
return false;
} else {
for (var member in this.dataStore) {
//不包含
if (!set.contains(member)) {
return false;
}
}
}
return true;
},
difference: function (set) {
//补集
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();
cis.add("Mike");
cis.add("Clayton");
cis.add("Jennifer");
cis.add("Raymond");
var dmp = new Set();
dmp.add("Raymond");
dmp.add("Cynthia");
dmp.add("Bryan");
var hj = cis.union(dmp); //并集
var jj = cis.intersect(dmp); //交集
console.log(cis.subset(dmp)); //判断是否dmp子集
var bj = cis.difference(dmp); //补集
console.log(hj);
console.log(jj);
console.log(bj);