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Return indexes of greatest values in an array in JavaScript
We are required to write a JavaScript function that takes in an array of Numbers. The array may contain more than one greatest element (i.e., repeating greatest element).
We are required to write a JavaScript function that takes in one such array and returns all the indices of the greatest element.
Example
The code for this will be −
const arr = [10, 5, 4, 10, 5, 10, 6];
const findGreatestIndices = arr => {
const val = Math.max(...arr);
const greatest = arr.reduce((indexes, element, index) => {
if(element === val){
return indexes.concat([index]);
} else {
return indexes;
};
}, []);
return greatest;
}
console.log(findGreatestIndices(arr));Output
And the output in the console will be −
[ 0, 3, 5 ]
Updated on: 20-Nov-2020
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