Methods for merging (aka concatenating) arrays

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Thu Apr 08 2021 08:02:21 GMT+0000 (UTC)

const arr1 = ['a', 'b', 'c'];
const arr2 = ['1', '2', '3'];
// Using .concat()
console.info(arr1.concat(arr2)); // ["a","b","c","1","2","3"]
// Using spread operators
console.info([...arr1, ...arr2]); // ["a","b","c","1","2","3"]
// This works too:
console.info(['a', 'b', 'c', ...arr2]); // ["a","b","c","1","2","3"]
// Using Array.of
console.info(Array.of(...arr1, ...arr2)); // ["a","b","c","1","2","3"]
// With reduce
console.info(arr2.reduce(function(array,value) {
  array.push(value);
  return array;
}, arr1)); // ["a","b","c","1","2","3"]

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Methods for merging (aka concatenating) arrays

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