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reduceWhich javascript Code Snippet in 2024

arrayintermediate

Last Updated: 16 May 2024

Returns the minimum/maximum value of an array, after applying the provided function to set the comparing rule.

  • Use Array.prototype.reduce() in combination with the comparator function to get the appropriate element in the array.
  • Omit the second argument, comparator, to use the default one that returns the minimum element in the array.
const reduceWhich = (arr, comparator = (a, b) => a - b) => arr.reduce((a, b) => (comparator(a, b) >= 0 ? b : a));
reduceWhich([1, 3, 2]); // 1 reduceWhich([1, 3, 2], (a, b) => b - a); // 3 reduceWhich( [ { name: 'Tom', age: 12 }, { name: 'Jack', age: 18 }, { name: 'Lucy', age: 9 } ], (a, b) => a.age - b.age ); // {name: 'Lucy', age: 9}

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