The reduce() method applies a function against an accumulator and each value of the array (from left-to-right) to reduce it to a single value.
The splice() method changes the content of an array by removing existing elements and/or adding new elements.
The toLocaleString() method returns a string representing the elements of the array. The elements are converted to Strings using their toLocaleString methods and these Strings are separated by a locale-specific String (such as a comma “,”).
The Uint8Array typed array represents an array of 8-bit unsigned integers. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
The JavaScript Array object is a global object that is used in the construction of arrays; which are high-level, list-like objects.
The initial value of the @@iterator property is the same function object as the initial value of the values() property.
The copyWithin() method shallow copies part of an array to another location in the same array and returns it, without modifying its size.
The entries() method returns a new Array Iterator object that contains the key/value pairs for each index in the array.
The every() method tests whether all elements in the array pass the test implemented by the provided function.
The fill() method fills all the elements of an array from a start index to an end index with a static value.
The filter() method creates a new array with all elements that pass the test implemented by the provided function.
The find() method returns a value in the array, if an element in the array satisfies the provided testing function. Otherwise undefined is returned.
The findIndex() method returns an index in the array, if an element in the array satisfies the provided testing function. Otherwise -1 is returned.
The forEach() method executes a provided function once per array element.
The includes() method determines whether an array includes a certain element, returning true or false as appropriate. 
The indexOf() method returns the first index at which a given element can be found in the array, or -1 if it is not present.
The keys() method returns a new Array Iterator that contains the keys for each index in the array.
The lastIndexOf() method returns the last index at which a given element can be found in the array, or -1 if it is not present. The array is searched backwards, starting at fromIndex.
The map() method creates a new array with the results of calling a provided function on every element in this array.
The reduceRight() method applies a function against an accumulator and each value of the array (from right-to-left) has to reduce it to a single value.