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updating array conactenation example to use ES6

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Soorena
2017-12-16 13:41:55 +03:30
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snippets/array-concatenation.md
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### Array concatenation ### Array concatenation
Use `Array.concat()` to concatenate an array with any additional arrays and/or values, specified in `args`. Use Array spread operators to concatenate an array with any additional arrays and/or values, specified in `args`.
```js ```js
const ArrayConcat = (arr, ...args) => [].concat(arr, ...args); const ArrayConcat = (arr, ...args) => [...arr,...args];
// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]] // ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]]
``` ```