npm install hashsetHasSet
======
A simple hash set in JavaScript
javascript
var HashSet = require('hashset');//Create an empty hash set
var hashset = new HashSet();
//Create a hash set an initialize it with a value 'a'
var hashset = new HashSet('a');
//Create a hash set an initialize it with a set of values
var hashset = new HashSet('a', 'b', 'c');
//Create a hash set an initialize it with 3 different values
var hashset = new HashSet(1, '1', [1]);
`Properties
$3
Get the length of the hash set
javascript
hashset.length;
`Methods
$3
Test whether current hash set equals to another
javascript
var hashset1 = new HashSet(1, 2, 3, 4, 5);
var hashset2 = new HashSet(1, 2, 3, 4, 5);
var result = hashset1.equals(hashset2); //true
`$3
Check whether a value is in the hash set
javascript
hashset.contains(val);
`$3
Add a new value into the hash set
javascript
hashset.add(val);
`$3
Remove a value from the hash set
javascript
hashset.remove(val);
`
Removing an non-existing value will not trigger any error$3
Convert and output all values into an array
javascript
var hashset = new HashSet(1, 2, 3);
hashset.toArray(); // [1, 2, 3]
`
There is no gurantee the values of the output array the same sequence as value added to the hash set.$3
Test whether a hash set is a sub set of another. Empty hash set is a sub set of any other hash set including another empty hash set.
javascript
var hashset1 = new HashSet();
var hashset2 = new HashSet();
var result = hashset1.isSubSetOf(hashset2);
`
$3
Test whether a hash set is a super set of another. Any hash set is a super set of empty hahs set including an empty hash set.
javascript
var hashset1 = new HashSet(1, 2, 3);
var hashset2 = new HashSet(1, 2, 3);
var hashset3 = new HashSet();
var result1 = hashset1.isSuperSetOf(hashset2); //true
var result2 = hashset2.isSuperSetOf(hashset1); //true
var result3 = hashset1.isSuperSetOf(hashset3); //true
var result3 = hashset3.isSuperSetOf(hashset1); //false
`$3
Union current hash set with another
javascript
var hashset1 = new HashSet(1, 2);
var hashset2 = new HashSet(2, 3);
hashset1.unionWith(hashset2);
hashset1.contains(1); //true
hashset1.contains(2); //true
hashset1.contains(3); //true
`$3
Intersect current hash set with another
javascript
var hashset1 = new HashSet(1, 2, 3);
var hashset2 = new HashSet(2, 3, 4);
hashset1.intersectWith(hashset2);
hashset1.length; //2
hashset1.contains(2); //true
hashset1.contains(3); //true
hashset1.contains(4); //false
`Test
Make sure is installed globally
`
npm install mocha -g
Run