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Merge pull request #7809 from viktortnk/arrayFlatten-documentation

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document arrayFlatten (flatten) in en, ru
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16
docs/en/query_language/functions/array_functions.md
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@ -772,6 +772,22 @@ SELECT arrayReduce('uniqUpTo(3)', [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
└─────────────────────────────────────────────────────────────┘
```
## arrayFlatten(arr) {#array_functions-arrayflatten}
The `arrayFlatten` (or `flatten` alias) method will collapse the elements of an array to create a single array.
Example:
```sql
SELECT arrayFlatten([[1, 2, 3], [4, 5]])
```
```text
┌─arrayFlatten([[1, 2, 3], [4, 5]])─┐
│ [1,2,3,4,5] │
└───────────────────────────────────┘
```
## arrayReverse(arr) {#array_functions-arrayreverse}
Returns an array of the same size as the original array containing the elements in reverse order.

16
docs/ru/query_language/functions/array_functions.md
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@ -778,6 +778,22 @@ SELECT arrayReduce('uniqUpTo(3)', [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
└─────────────────────────────────────────────────────────────┘
```
## arrayFlatten(arr) {#array_functions-arrayflatten}
Функция `arrayFlatten` (или `flatten`) соеденит вложенные массивы и вернет массив из их элементов.
Пример:
```sql
SELECT arrayFlatten([[1, 2, 3], [4, 5]])
```
```text
┌─arrayFlatten([[1, 2, 3], [4, 5]])─┐
│ [1,2,3,4,5] │
└───────────────────────────────────┘
```
## arrayReverse(arr) {#array_functions-arrayreverse}
Возвращает массив того же размера, что и исходный массив, содержащий элементы в обратном порядке.