Count frequency of numbers
Java
Easy
5 views
Problem Description
Task: return a map of number -> frequency from the given int array.
Output Format
Return value
Constraints
Use HashMap getOrDefault.
Official Solution
static java.util.Map<Integer,Integer> freqMap(int[] a){java.util.HashMap<Integer,Integer> m=new java.util.HashMap<>();for(int x:a) m.put(x,m.getOrDefault(x,0)+1);return m;}
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