Commit c3e27ba

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add multiset size and isempty methods

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+12

-2

lines changed

+12

-2

lines changed

Lines changed: 12 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -6,24 +6,34 @@`
`6`	`6`	`*/`
`7`	`7`	`class MultiSet<K> {`
`8`	`8`	`private HashMap<K, Integer> multiSet = new HashMap<K, Integer>();`
`9`		`-`
	`9`	`+privateintsize;`
`10`	`10`	`int get(K key){`
`11`	`11`	`return multiSet.getOrDefault(key, 0);`
`12`	`12`	`}`
`13`	`13`
`14`	`14`	`void add(K key){`
	`15`	`+ size++;`
`15`	`16`	`multiSet.put(key, get(key)+ 1);`
`16`	`17`	`}`
`17`	`18`
`18`	`19`	`void remove(K key){`
`19`	`20`	`int freq = get(key);`
	`21`	`+ size--;`
`20`	`22`	`if(freq == 1){`
`21`	`23`	`multiSet.remove(key);`
`22`	`24`	`}else{`
`23`	`25`	`multiSet.put(key, freq - 1);`
`24`	`26`	`}`
`25`	`27`	`}`
`26`		`-`
	`28`	`+`
	`29`	`+ public int size(){`
	`30`	`+ return size;`
	`31`	`+ }`
	`32`	`+`
	`33`	`+ public boolean isEmpty(){`
	`34`	`+ return size == 0;`
	`35`	`+ }`
	`36`	`+`
`27`	`37`	`@Override`
`28`	`38`	`public String toString(){`
`29`	`39`	`return multiSet.toString();`

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