Array array operation

Function

Array prototype function provides add, delete, modify, sort, slice, flatten, deep copy and high-order traversal capabilities.

API List

API	Description
Array.len	Returns the number of array elements.
Array.to_string	Serialize an array into a JSON string.
Array.join	Splice the array elements into a string according to the delimiter.
Array.each	Traverse the array and execute callbacks.
Array.pop	Delete and return the last element of the array.
Array.first	Returns the first element of the array; returns empty for an empty array.
Array.last	Returns the last element of the array; returns empty for an empty array.
Array.at	Read elements by subscript, and support reading negative numbers from the tail.
Array.push	Append one or more elements to the end of the array.
Array.shift	Delete and return the first element of the array.
Array.unshift	Insert one or more elements into the beginning of the array.
Array.insert	Insert one or more elements at the specified index.
Array.sort	Sort an array. When no callback is passed, the order is sorted by the element string value; when the callback is passed, the order is determined by the number returned by the callback.
Array.reverse	Reverse the order of array elements.
Array.slice	Copy the array fragment according to the starting and ending indexes.
Array.splice	Removes the specified range from the array and inserts new elements.
Array.concat	Consolidate the current array and subsequent parameters. Array parameters are expanded one level, and non-array parameters are appended element by element.
Array.contains	Determine whether the array contains the specified value.
Array.index_of	Returns the index of the first occurrence of the specified value.
Array.last_index_of	Returns the index of the last occurrence of the specified value.
Array.find	Returns the first element for which the callback result is true.
Array.find_index	Returns the index of the first element for which the callback result is true.
Array.find_last	Returns the first element from right to left for which the callback result is true.
Array.find_last_index	Returns the first element index from right to left for which the callback result is true.
Array.every	Determine whether all elements in the array make the callback result true.
Array.some	Determine whether there is an element in the array and make the callback result true.
Array.filter	Filter elements so that the callback result is true.
Array.map	Traverse the array and form a new array with the callback return value.
Array.reduce	Accumulate array elements from left to right.
Array.reduce_right	Accumulate array elements from right to left.
Array.fill	Fills a range of the array with the specified value.
Array.flat	Flatten a nested array by depth.
Array.flat_map	First map and then expand the mapping result by depth 1.
Array.keys	Returns an array of array subscripts.
Array.values	Returns a shallow copy of the array.
Array.entries	Returns an array of entries in the form [index, value].
Array.clone	Returns an array deep copy.
Array.delete	Delete the element at the specified index.
Array.remove_at	Delete and return the element with the specified subscript, supporting negative subscripts.
Array.clear	Clear the array and return the original array.
Array.is_empty	Determine whether the array is empty.
Array.unique	Returns the new array after deduplication in order of first appearance.
Array.chunk	Split the array into a two-dimensional array according to the specified size.

Examples

Notes

push, pop, shift, unshift, insert, sort, reverse, splice, fill, delete, remove_at, clear will modify the original array.

- slice, concat, map, filter, flat, flat_map, clone, values, entries, unique, chunk Return a new array.