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hasMany javascript Code Snippet in 2024

arraybeginner

Last Updated: 28 February 2024

Checks if an array has more than one value matching the given function.

  • Use Array.prototype.filter() in combination with fn to find all matching array elements.
  • Use Array.prototype.length to check if more than one element match fn.
const hasMany = (arr, fn) => arr.filter(fn).length > 1;
hasMany([1, 3], x => x % 2); // true hasMany([1, 2], x => x % 2); // false

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