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An array is a collection of values stored in a list that can be accessed by position. The array literal is a comma-separated list of values enclosed in square brackets.
Visualizing it
The array data-structure is much like a bin of numbered pages. (Whereas the object data-structure is like a file cabinet.)
Members
These properties and methods are available on the global Array constructor.
prototype
| Data type | object |
|---|---|
| Standard | ECMA-262 §15.4.3.1 |
| Documentation | Mozilla, Microsoft |
These members are available on each instance of Array. (This includes array literals.)
join
| Data type | function |
|---|---|
| Return type | string |
| Parameter list | [separator (string)] |
| Standard | ECMA-262 §15.4.4.5 |
| Documentation | Mozilla Microsoft |
Joins all elements of an array into a string.
separator
Optional. Specifies a string to separate each element of the array. The separator is converted to a string if necessary. If omitted, the array elements are separated with a comma.
splice
| Data type | function |
|---|---|
| Return type | array |
| Parameter list | index (number), howMany (number), [element1][, ..., elementN] (any type) |
| Standard | ECMA-262 §15.4.4.12 |
| Documentation | Mozilla, Microsoft |
Changes the content of an array, adding new elements while removing old elements.
index
Index at which to start changing the array. If negative, will begin that many elements from the end.
howMany
An integer indicating the number of old array elements to remove. If howMany is 0, no elements are removed. In this case, you should specify at least one new element.
element1, ..., elementN
Optional. The elements to add to the array. If you don't specify any elements, splice simply removes elements from the array.