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JavaScript - how to find max value in array of arrays?

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Using JavaScript it is possible to find maximum value in array of arrays in following way.

1. Custom method example

// ONLINE-RUNNER:browser;

function findMax() {
  function checkEntry(entry) {
    if (entry instanceof Array) {
        return findMax.apply(null, entry);
      return entry;

  if (arguments.length > 0) {
    var result = checkEntry(arguments[0]);

    for (var i = 1; i < arguments.length; ++i) {
      var value = checkEntry(arguments[i]);

      if (value > result) {
        result = value;

    return result;

  return NaN;

console.log(findMax(1, 2, 3, [4, 5, 6],[7, 8, [9, 10]]));

See also

  1. JavaScript - Math.max() method example
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