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// Longhand | |
const numbers = [1, 2, 3]; | |
const clone = numbers.slice(); | |
const mergedArray = numbers.concat([4, 5, 6]); | |
// Shorthand | |
const numbers = [1, 2, 3]; | |
const clone = [...numbers]; | |
const mergedArray = [...numbers, 4, 5, 6]; |
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