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Implement a function called countUniqueValues(pointers pattern) 본문

functions and trick/typescript_javascript

Implement a function called countUniqueValues(pointers pattern)

taesikk 2022. 4. 29. 10:56

Implement a function called countUniqueValues which accepts a sorted array, and counts the unique values in the array . There can be negative numbers in the array, but it will always be sorted.

 

function countUniqueValues(arr) {
	if(arr.length ===0) return 0;
    let i =0;
    for(let j=1; j<arr.length; j++) {
    	if(arr[i] !== arr[j]){
        	i++;
            arr[i] = arr[j];
        }
    }
    return i+1;
}

 

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