- Companion
- object
Value members
Inherited methods
Combines two or more arrays. This method returns a new array without modifying any existing arrays.
Combines two or more arrays. This method returns a new array without modifying any existing arrays.
- Value Params
- items
Additional arrays and/or items to add to the end of the array.
- Inherited from
- Array
Returns the this object after copying a section of the array identified by start and end to the same array starting at position target
Returns the this object after copying a section of the array identified by start and end to the same array starting at position target
- Value Params
- end
If not specified, length of the this object is used as its default value.
- start
If start is negative, it is treated as length+start. If end is negative, it is treated as length+end.
- target
If target is negative, it is treated as length+target where length is the length of the array.
- Inherited from
- Array
Returns an iterable of key, value pairs for every entry in the array
Returns an iterable of key, value pairs for every entry in the array
- Inherited from
- Array
Determines whether all the members of an array satisfy the specified test.
Determines whether all the members of an array satisfy the specified test.
- Value Params
- predicate
A function that accepts up to three arguments. The every method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value false, or until the end of the array.
- thisArg
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
- Inherited from
- Array
Determines whether all the members of an array satisfy the specified test.
Determines whether all the members of an array satisfy the specified test.
- Value Params
- predicate
A function that accepts up to three arguments. The every method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value false, or until the end of the array.
- thisArg
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
- Inherited from
- Array
Returns the this object after filling the section identified by start and end with value
Returns the this object after filling the section identified by start and end with value
- Value Params
- end
index to stop filling the array at. If end is negative, it is treated as length+end.
- start
index to start filling the array at. If start is negative, it is treated as length+start where length is the length of the array.
- value
value to fill array section with
- Inherited from
- Array
Returns the elements of an array that meet the condition specified in a callback function.
Returns the elements of an array that meet the condition specified in a callback function.
- Value Params
- predicate
A function that accepts up to three arguments. The filter method calls the predicate function one time for each element in the array.
- thisArg
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
- Inherited from
- Array
Returns the elements of an array that meet the condition specified in a callback function.
Returns the elements of an array that meet the condition specified in a callback function.
- Value Params
- predicate
A function that accepts up to three arguments. The filter method calls the predicate function one time for each element in the array.
- thisArg
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
- Inherited from
- Array
Returns the value of the first element in the array where predicate is true, and undefined otherwise.
Returns the value of the first element in the array where predicate is true, and undefined otherwise.
- Value Params
- predicate
find calls predicate once for each element of the array, in ascending order, until it finds one where predicate returns true. If such an element is found, find immediately returns that element value. Otherwise, find returns undefined.
- thisArg
If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead.
- Inherited from
- Array
Returns the index of the first element in the array where predicate is true, and -1 otherwise.
Returns the index of the first element in the array where predicate is true, and -1 otherwise.
- Value Params
- predicate
find calls predicate once for each element of the array, in ascending order, until it finds one where predicate returns true. If such an element is found, findIndex immediately returns that element index. Otherwise, findIndex returns -1.
- thisArg
If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead.
- Inherited from
- Array
Returns a new array with all sub-array elements concatenated into it recursively up to the specified depth.
Returns a new array with all sub-array elements concatenated into it recursively up to the specified depth.
- Value Params
- depth
The maximum recursion depth
- Inherited from
- Array
- Inherited from
- Array
Calls a defined callback function on each element of an array. Then, flattens the result into a new array. This is identical to a map followed by flat with depth 1.
Calls a defined callback function on each element of an array. Then, flattens the result into a new array. This is identical to a map followed by flat with depth 1.
- Value Params
- callback
A function that accepts up to three arguments. The flatMap method calls the callback function one time for each element in the array.
- thisArg
An object to which the this keyword can refer in the callback function. If thisArg is omitted, undefined is used as the this value.
- Inherited from
- Array
Performs the specified action for each element in an array.
Performs the specified action for each element in an array.
- Value Params
- callbackfn
A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
- thisArg
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
- Inherited from
- Array
Determines whether an array includes a certain element, returning true or false as appropriate.
Determines whether an array includes a certain element, returning true or false as appropriate.
- Value Params
- fromIndex
The position in this array at which to begin searching for searchElement.
- searchElement
The element to search for.
- Inherited from
- Array
Returns the index of the first occurrence of a value in an array, or -1 if it is not present.
Returns the index of the first occurrence of a value in an array, or -1 if it is not present.
- Value Params
- fromIndex
The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
- searchElement
The value to locate in the array.
- Inherited from
- Array
Adds all the elements of an array into a string, separated by the specified separator string.
Adds all the elements of an array into a string, separated by the specified separator string.
- Value Params
- separator
A string used to separate one element of the array from the next in the resulting string. If omitted, the array elements are separated with a comma.
- Inherited from
- Array
Returns an iterable of keys in the array
Returns an iterable of keys in the array
- Inherited from
- Array
Returns the index of the last occurrence of a specified value in an array, or -1 if it is not present.
Returns the index of the last occurrence of a specified value in an array, or -1 if it is not present.
- Value Params
- fromIndex
The array index at which to begin searching backward. If fromIndex is omitted, the search starts at the last index in the array.
- searchElement
The value to locate in the array.
- Inherited from
- Array
Calls a defined callback function on each element of an array, and returns an array that contains the results.
Calls a defined callback function on each element of an array, and returns an array that contains the results.
- Value Params
- callbackfn
A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
- thisArg
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
- Inherited from
- Array
Removes the last element from an array and returns it. If the array is empty, undefined is returned and the array is not modified.
Removes the last element from an array and returns it. If the array is empty, undefined is returned and the array is not modified.
- Inherited from
- Array
Appends new elements to the end of an array, and returns the new length of the array.
Appends new elements to the end of an array, and returns the new length of the array.
- Value Params
- items
New elements to add to the array.
- Inherited from
- Array
Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
- Value Params
- callbackfn
A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
- initialValue
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
- Inherited from
- Array
Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
- Value Params
- callbackfn
A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
- initialValue
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
- Inherited from
- Array
Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
- Value Params
- callbackfn
A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
- initialValue
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
- Inherited from
- Array
Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
- Value Params
- callbackfn
A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
- initialValue
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
- Inherited from
- Array
Reverses the elements in an array in place. This method mutates the array and returns a reference to the same array.
Reverses the elements in an array in place. This method mutates the array and returns a reference to the same array.
- Inherited from
- Array
Removes the first element from an array and returns it. If the array is empty, undefined is returned and the array is not modified.
Removes the first element from an array and returns it. If the array is empty, undefined is returned and the array is not modified.
- Inherited from
- Array
Returns a copy of a section of an array. For both start and end, a negative index can be used to indicate an offset from the end of the array. For example, -2 refers to the second to last element of the array.
Returns a copy of a section of an array. For both start and end, a negative index can be used to indicate an offset from the end of the array. For example, -2 refers to the second to last element of the array.
- Value Params
- end
The end index of the specified portion of the array. This is exclusive of the element at the index 'end'. If end is undefined, then the slice extends to the end of the array.
- start
The beginning index of the specified portion of the array. If start is undefined, then the slice begins at index 0.
- Inherited from
- Array
Determines whether the specified callback function returns true for any element of an array.
Determines whether the specified callback function returns true for any element of an array.
- Value Params
- predicate
A function that accepts up to three arguments. The some method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value true, or until the end of the array.
- thisArg
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
- Inherited from
- Array
Sorts an array in place. This method mutates the array and returns a reference to the same array.
Sorts an array in place. This method mutates the array and returns a reference to the same array.
- Value Params
- compareFn
Function used to determine the order of the elements. It is expected to return a negative value if first argument is less than second argument, zero if they're equal and a positive value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
[11,2,22,1].sort((a, b) => a - b)
- Inherited from
- Array
Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
- Value Params
- deleteCount
The number of elements to remove.
- items
Elements to insert into the array in place of the deleted elements.
- start
The zero-based location in the array from which to start removing elements.
- Inherited from
- Array
Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
- Value Params
- deleteCount
The number of elements to remove.
- start
The zero-based location in the array from which to start removing elements.
- Inherited from
- Array
Inserts new elements at the start of an array, and returns the new length of the array.
Inserts new elements at the start of an array, and returns the new length of the array.
- Value Params
- items
Elements to insert at the start of the array.
- Inherited from
- Array
Returns an iterable of values in the array
Returns an iterable of values in the array
- Inherited from
- Array
Inherited fields
Gets or sets the length of the array. This is a number one higher than the highest index in the array.
Gets or sets the length of the array. This is a number one higher than the highest index in the array.
- Inherited from
- Array
Returns an object whose properties have the value 'true' when they will be absent when used in a 'with' statement.
Returns an object whose properties have the value 'true' when they will be absent when used in a 'with' statement.
- Inherited from
- Array