[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [\_Array](./rc-js-util._array.md) ## \_Array class Utilities that apply to `Array` and `ArrayLike`. **Signature:** ```typescript export declare class _Array ``` ## Properties

Property	Modifiers	Type	Description
[addToSet](./rc-js-util._array.addtoset.md)	`static` `readonly`	typeof arrayAddToSet	Adds the items in an array to the set.
[binaryFindInsertionIndex](./rc-js-util._array.binaryfindinsertionindex.md)	`static` `readonly`	typeof arrayBinaryFindInsertionIndex	Performs a bisection search of an 'indexable' object such that if the value were inserted, it would remain in order.
[binaryIndexOf](./rc-js-util._array.binaryindexof.md)	`static` `readonly`	typeof arrayBinaryIndexOf	Performs a bisection search of an 'indexable' object, i.e. can be accessed by index, for example `Array`. Custom data structures are also supported.
[binaryLastIndexOf](./rc-js-util._array.binarylastindexof.md)	`static` `readonly`	typeof arrayBinaryLastIndexOf	Performs a bisection search of an 'indexable' object, i.e. can be accessed by index, for example `Array`. Custom data structures are also supported.
[collect](./rc-js-util._array.collect.md)	`static` `readonly`	typeof arrayCollect	Like `Array.reduce` but without the requirement to return the value in the callback.
[compact](./rc-js-util._array.compact.md)	`static` `readonly`	typeof arrayCompact	Strips null and undefined items from arrays (non mutative).
[compactMap](./rc-js-util._array.compactmap.md)	`static` `readonly`	typeof arrayCompactMap	Like \_Array.map but where the callback returns null it will be omitted from the result.
[contains](./rc-js-util._array.contains.md)	`static` `readonly`	typeof arrayContains	Returns true if the item is present in the list (=== equality test).
[copyInto](./rc-js-util._array.copyinto.md)	`static` `readonly`	typeof arrayCopyInto	Make an array contain the same items as another.
[emptyArray](./rc-js-util._array.emptyarray.md)	`static` `readonly`	readonly \[\]	An empty readonly array, useful to avoid GC pressure.
[flatMap](./rc-js-util._array.flatmap.md)	`static` `readonly`	typeof arrayFlatMap	Iterate over `ArrayLike` calling a callback against it, the callback returns `ArrayLike` which is concatenated into a single `Array`.
[forEach](./rc-js-util._array.foreach.md)	`static` `readonly`	typeof arrayForEach	Like `Array.forEach`.
[forEachRange](./rc-js-util._array.foreachrange.md)	`static` `readonly`	typeof arrayForEachRange	Like [arrayForEach()](./rc-js-util.arrayforeach.md) with integer range as input.
[generateRange](./rc-js-util._array.generaterange.md)	`static` `readonly`	typeof arrayGenerateRange	Generates a range of integers output in an `Array`.
[index](./rc-js-util._array.index.md)	`static` `readonly`	typeof arrayIndex	Populates a `Map` given a key creating function and `ArrayLike`.
[insertAtIndex](./rc-js-util._array.insertatindex.md)	`static` `readonly`	typeof arrayInsertAtIndex	Modifies input array by inserting at given index.
[intersect](./rc-js-util._array.intersect.md)	`static` `readonly`	typeof arrayIntersect	Given two `ArrayLike`, provides the items common between them in an `Array`.
[isArray](./rc-js-util._array.isarray.md)	`static` `readonly`	typeof arrayIsArray	Checks if the parameter is an instance of `Array` or is a view of `ArrayBuffer`.
[isNotEmpty](./rc-js-util._array.isnotempty.md)	`static` `readonly`	typeof arrayIsNotEmpty	Returns true if the argument is not null, undefined or empty. Type narrows to `TArray` where true.
[last](./rc-js-util._array.last.md)	`static` `readonly`	typeof arrayLast	Gets the last value in `ArrayLike`.
[map](./rc-js-util._array.map.md)	`static` `readonly`	typeof arrayMap	Like `Array.map`.
[mapRange](./rc-js-util._array.maprange.md)	`static` `readonly`	typeof arrayMapRange	Like [arrayMap()](./rc-js-util.arraymap.md) with integer range as input.
[max](./rc-js-util._array.max.md)	`static` `readonly`	typeof arrayMax	Find the largest number in an array, if the array is empty the return is -Infinity.
[min](./rc-js-util._array.min.md)	`static` `readonly`	typeof arrayMin	Find the smallest number in an array, if the array is empty the return is Infinity.
[normalizeEmptyToUndefined](./rc-js-util._array.normalizeemptytoundefined.md)	`static` `readonly`	typeof arrayNormalizeEmptyToUndefined	Replaces length 0 `ArrayLike` with `undefined`.
[normalizeNullishToEmpty](./rc-js-util._array.normalizenullishtoempty.md)	`static` `readonly`	typeof arrayNormalizeNullishToEmpty	Replaces `null` / `undefined` with an empty `Array`.
[pushUnique](./rc-js-util._array.pushunique.md)	`static` `readonly`	typeof arrayPushUnique	Like `Array.push` but checks if the value is unique first.
[removeMany](./rc-js-util._array.removemany.md)	`static` `readonly`	typeof arrayRemoveMany	Removes each item in `itemsToRemove` from `items` (including any repeated items).
[removeOne](./rc-js-util._array.removeone.md)	`static` `readonly`	typeof arrayRemoveOne	Removes either 0 or one item from items, even if itemToRemove appears more than once.
[replaceOne](./rc-js-util._array.replaceone.md)	`static` `readonly`	typeof arrayReplaceOne	Replaces the first match of itemToRemove with replaceWith.
[setDifference](./rc-js-util._array.setdifference.md)	`static` `readonly`	typeof arraySetDifference	returns items in A not in B.
[symmetricDifference](./rc-js-util._array.symmetricdifference.md)	`static` `readonly`	typeof arraySymmetricDifference	Returns those items in A not in B, and those items in B not in A.
[union](./rc-js-util._array.union.md)	`static` `readonly`	typeof arrayUnion	Given an `ArrayLike` of `ArrayLike`, provides all unique items in an `Array`.
[unique](./rc-js-util._array.unique.md)	`static` `readonly`	typeof arrayUnique	Creates a new array with no duplicates, using standard object equality.