refactor modules into namespaces

src/bitarray.ts

@@ -1,4 +1,4 @@
-import { join } from "./collector.js";
+import { Collector } from "./collector.js";
 import { Enumerable } from "./sync.js";
 import { asArray, isDefined } from "./utils.js";
 
@@ -255,7 +255,7 @@ class BitArrayImpl implements BitArray {
   }
 
   public toString() {
-    return Enumerable.sequence(this).select(bit => bit ? '1' : '0').collect(join());
+    return Enumerable.sequence(this).select(bit => bit ? '1' : '0').collect(Collector.join());
   }
 }
 
@@ -497,7 +497,7 @@ class BitArraySlice implements BitArray {
   }
 
   public toString() {
-    return Enumerable.sequence(this).select(bit => bit ? '1' : '0').collect(join());
+    return Enumerable.sequence(this).select(bit => bit ? '1' : '0').collect(Collector.join());
   }
 }
 

src/collector.ts

@@ -6,6 +6,7 @@ export interface Collector<TElement, TAccumulator, TResult> {
   finalize(accumulator: TAccumulator): TResult;
 }
 
+export namespace Collector {
   class SimpleCollector<TElement, TAccumulator, TResult> implements Collector<TElement, TAccumulator, TResult> {
     readonly #initialize: () => TAccumulator;
     readonly #accumulate: (accumulator: TAccumulator, element: TElement) => void;
@@ -243,3 +244,4 @@ const bigintAverageCollector = new BigIntAverageCollector();
   export function bigintAverage(): Collector<bigint, any, bigint> {
     return bigintAverageCollector;
   }
+}

src/index.ts

@@ -1,4 +1,4 @@
 export * from "./sync.js";
 export * from "./async.js";
-export * as collectors from "./collector.js";
+export * from "./collector.js";
-export * as random from "./random.js";
+export * from "./random.js";

src/random.ts

@@ -11,6 +11,7 @@ export interface RandomOptions<T = any> {
   random?: RandomGenerator;
 };
 
+export namespace Random {
   export const alwaysTrue: ElementPredicate = () => true;
   export const weightOfOne: ElementWeight = () => 1.0;
   export const mathRandom: RandomGenerator = () => Math.random();
@@ -132,3 +133,4 @@ export class RandomPicker<T> {
       return result.element;
     }
   }
+}

src/sync.ts

@@ -1,6 +1,6 @@
 import { createEqualitySet } from "./equality-set.js";
 import { createEqualityMap } from "./equality-map.js";
-import { RandomGenerator, RandomOptions, getRandomElement, mathRandom } from "./random.js";
+import { RandomGenerator, RandomOptions, Random } from "./random.js";
 import { createQueue } from "./queue.js";
 import { Collector } from "./collector.js";
 import { combineComparers, defaultArrayComparer, identity, operatorCompare, reverseComparer, strictEquals, wrapAsIterable } from "./utils.js";
@@ -279,7 +279,7 @@ export namespace Enumerable {
   }
 
   export function randomSequence(random?: RandomGenerator): Enumerable<number> {
-    return new FunctionEnumerable(random ?? mathRandom);
+    return new FunctionEnumerable(random ?? Random.mathRandom);
   }
 
   export function concat<T>(...enumerables: Enumerable<T>[]): Enumerable<T> {
@@ -899,7 +899,7 @@ export abstract class BaseEnumerable<TElement> extends EnumerableMarker implemen
   }
 
   random(options?: RandomOptions<TElement>) {
-    return getRandomElement(this, options).element;
+    return Random.getRandomElement(this, options).element;
   }
 
   cached(): Enumerable<TElement> {