_array

(arguments: {
  on: any[],
  target: number,
  start?: number,
  end?: number
}): any[]
(arguments: [
  on: any[],
  target: number,
  start?: number,
  end?: number
]): any[]

The _array.copyWithin method copies part of an array to another location in the same array without modifying its length.

_array.every

(arguments: {
  on: any[],
  callback: function,
}): boolean
(arguments: [
  on: any[],
  callback: function,
]): boolean

The _array.every method tests whether all elements in the array pass the test implemented by the provided function. It returns a Boolean value.

_array.fill

(arguments: {
  on: any[],
  value: any,
  start?: number,
  end?: number
}): any[]
(arguments: [
  on: any[],
  value: number,
  start?: number,
  end?: number
]): any[]

The _array.fill method changes all elements in an array to a static value, from a start index to an end index.

(arguments: {
  on: any[],
  callback: function,
}): any[]
(arguments: [
  on: any[],
  callback: function,
]): any[]

The _array.filter method returns an array with all elements that pass the test implemented by the provided function.

_array.find

(arguments: {
  on: any[],
  callback: function,
}): any
(arguments: [
  on: any[],
  callback: function,
]): any

The _array.find method returns the value of the first element in the provided array that satisfies the provided testing function. If no values satisfies the testing function, undefined is returned.

_array.findIndex

(arguments: {
  on: any[],
  callback: function,
}): number
(arguments: [
  on: any[],
  callback: function,
]): number

The _array.findIndex method returns the index of the first element in the array that satisfies the provided testing function. Otherwise, it returns -1, indicating that no element passed the test.

_array.flat

(arguments: {on: any[], depth?: number}): any[]
(arguments: [on: any[], depth?: number]): any[]

The _array.flat method returns a array with all sub-array elements concatenated into it recursively up to the specified depth.

_array.includes

(arguments: {on: any[], value: any}): boolean
(arguments: [on: any[], value: any]): boolean

The _array.includes method determines whether an array includes a certain value among its entries, returning true or false as appropriate.

_array.indexOf

(arguments: {on: any[], value: any}): number
(arguments: [on: any[], value: any]): number

The _array.indexOf method returns the first index at which a given element can be found in the array, or -1 if it is not present.

_array.join

(arguments: {on: any[], separator?: string}): string
(arguments: [on: any[], separator?: string]): string

The _array.join method returns a string by concatenating all of the elements in an array, separated by commas or a specified separator string. If the array has only one item, then that item will be returned without using the separator.

_array.lastIndexOf

(arguments: {on: any[], value: any}): number
(arguments: [on: any[], value: any]): number

The _array.lastIndexOf method returns the last index at which a given element can be found in the array, or -1 if it is not present.

_array.length

(array: any[]}): number

The _array.length method returns the number of elements in the array.

_array.map

(arguments: {
  on: any[],
  callback: function,
}): any[]
(arguments: [
  on: any[],
  callback: function,
]): any[]

The _array.map method returns an array populated with the results of calling a provided function on every element in the provided array.

_array.reduce

(arguments: {
  on: any[],
  callback: function,
  initialValue?: any
}): any
(arguments: [
  on: any[],
  callback: function,
  initialValue?: any
]): any

The _array.reduce method executes a reducer function on each element of the array, resulting in single output value.

_array.reduceRight

(arguments: {
  on: any[],
  callback: function,
  initialValue?: any
}): any
(arguments: [
  on: any[],
  callback: function,
  initialValue?: any
]): any

The _array.reduceRight method applies a function against an accumulator and each value of the array (from right-to-left) to reduce it to a single value.

_array.reverse

(array: any[]}): any[]

The _array.reverse method reverses an array.

_array.slice

(arguments: {
  on: any[],
  start?: number,
  end?: number
}): number
(arguments: [
  on: any[],
  start?: number,
  end?: number
]): number

The _array.slice method returns a portion of an array selected from start to end (end not included) where start and end represent the index of items in that array.

_array.some

(arguments: {
  on: any[],
  callback: function,
}): boolean
(arguments: [
  on: any[],
  callback: function,
]): boolean

The _array.some method tests whether at least one element in the array passes the test implemented by the provided function. It returns a Boolean value.

_array.sort

(arguments: {on: any[]}): number

The _array.sort method sorts the elements of an array. The sort order is ascending, built upon converting the elements into strings, then comparing their sequences of UTF-16 code units values.

_array.splice

(arguments: {
  on: any[],
  start: number,
  deleteCount?: number
  insert: any[]
}): number
(arguments: {
  on: any[],
  start: number,
  deleteCount?: number,
  insert: any[]
}): number

The _array.slice method changes the contents of an array by removing or replacing existing elements and/or adding new elements.