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1-js/05-data-types/04-array/article.md
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@ -512,7 +512,7 @@ That's simple: don't use the `==` operator. Instead, compare them item-by-item i
Array is a special kind of object, suited to storing and managing ordered data items.
- The declaration:
The declaration:
```js
// square brackets (usual)
@ -527,6 +527,11 @@ Array is a special kind of object, suited to storing and managing ordered data i
- The `length` property is the array length or, to be precise, its last numeric index plus one. It is auto-adjusted by array methods.
- If we shorten `length` manually, the array is truncated.
Getting the elements:
- we can get element by its index, like `arr[0]`
- also we can use `at(i)` method to get negative-index elements, for negative values of `i`, it steps back from the end of the array. In the rest it works same as `arr[i]`, if `i >= 0`.
We can use an array as a deque with the following operations:
- `push(...items)` adds `items` to the end.