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JavaScript - copy two dimensional array
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In this article, we would like to show you how to create a copy of a two-dimensional array in JavaScript.
In this example, we use slice() method inside map() to copy all elements from the original array.
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const array = [2
['a', 'b'],3
['c', 'd']4
];5
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const copy = array.map((item) => item.slice());7
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console.log(JSON.stringify(copy)); // [ [ 'a', 'b' ], [ 'c', 'd' ] ]In this example, we use slice() method inside a for loop to iterate through the array and copy all of its elements.
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var array = [2
['a', 'b'],3
['c', 'd']4
];5
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var copy = [];7
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for (var i = 0; i < array.length; i++) {9
copy[i] = array[i].slice();10
}11
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console.log(JSON.stringify(copy)); // [ [ 'a', 'b' ], [ 'c', 'd' ] ]
