docs(TypeDoc): Count & length

Add documentation for count and length functions.

src/arrays.ts

@@ -325,10 +325,18 @@ export function init<T>(
   return target
 }
 
+/**
+ * Returns the number of items in the array.
+ * @param source The input collection.
+ */
 export function length<T>(source: T[]): number {
   return source.length
 }
 
+/**
+ * Returns the number of items in the array.
+ * @param source The input collection.
+ */
 export function count<T>(source: T[]): number {
   return source.length
 }

src/iterables.ts

@@ -362,10 +362,18 @@ export function take<T>(a: any, b?: any): any {
   return partial ? exec : exec(a)
 }
 
+/**
+ * Returns the number of items in the collection.
+ * @param source The input collection.
+ */
 export function length<T>(source: Iterable<T>): number {
   return count(source)
 }
 
+/**
+ * Returns the number of items in the collection.
+ * @param source The input collection.
+ */
 export function count<T>(source: Iterable<T>): number {
   let length = 0
   for (const _ of source) {

src/maps.ts

@@ -257,6 +257,10 @@ export function containsKey<Key, T>(a: any, b?: any): any {
   return partial ? exec : exec(a)
 }
 
+/**
+ * Returns the number of items in the collection.
+ * @param source The input collection.
+ */
 export function count<Key, T>(source: Map<Key, T>): number {
   return source.size
 }

src/sets.ts

@@ -254,6 +254,10 @@ export function find<T>(a: any, b?: any): any {
   return partial ? exec : exec(a)
 }
 
+/**
+ * Returns the number of items in the collection.
+ * @param source The input collection.
+ */
 export function count<T>(source: Set<T>): number {
   return source.size
 }