gensequence - npm Package Compare versions

Comparing version 0.2.1 to 0.2.2

lib/src/GenSequence.d.ts

@@ -8,4 +8,6 @@ export declare type Maybe<T> = T | undefined;
     /** reduce function see Array.reduce */
-    reduce(fnReduce: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T): Maybe<T>;
-    reduce<U>(fnReduce: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
+    reduce(fnReduce: (previousValue: T, currentValue: T, currentIndex: number) => T): Maybe<T>;
+    reduce<U>(fnReduce: (previousValue: U, currentValue: T, currentIndex: number) => U, initialValue: U): U;
+    reduceToSequence<U, V extends GenIterable<U>>(fnReduce: (previousValue: V, currentValue: T, currentIndex: number) => V, initialValue: V): Sequence<U>;
+    reduceToSequence<U>(fnReduce: (previousValue: GenIterable<U>, currentValue: T, currentIndex: number) => GenIterable<U>, initialValue: GenIterable<U>): Sequence<U>;
     scan(fnReduce: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): Sequence<T>;
@@ -12,0 +14,0 @@ scan<U>(fnReduce: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): Sequence<U>;

lib/src/GenSequence.js

@@ -11,2 +11,5 @@ "use strict";
         },
+        reduceToSequence: (fnReduce, initialValue) => {
+            return genSequence(reduce(fnReduce, initialValue, i));
+        },
         scan: (fnReduce, initValue) => {
@@ -13,0 +16,0 @@ return genSequence(scan(i, fnReduce, initValue));

package.json

 {
   "name": "gensequence",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "description": "Small library to simplify working with Generators and Iterators in Javascript / Typescript",
@@ -5,0 +5,0 @@ "main": "lib/index.js",

src/GenSequence.test.ts

@@ -51,2 +51,16 @@ import { genSequence, objectToSequence } from './GenSequence';
 
+    it('tests reducing a sequence to a sequence', () => {
+        const values = [1, 2, 3, 4, 5];
+        const gs = genSequence(values);
+        const result = gs.reduceToSequence<number>((a, v) => [...a, v], []);
+        expect(result.toArray()).to.deep.equal(values);
+    });
+
+    it('tests reducing a sequence to a Set to a sequence', () => {
+        const values = [1, 2, 3, 3, 4, 5, 5];
+        const gs = genSequence(values);
+        const result = gs.reduceToSequence<number, Set<number>>((a, v) => a.add(v), new Set<number>());
+        expect(result.toArray()).to.deep.equal([1, 2, 3, 4, 5]);
+    });
+
     it('tests combine', () => {
@@ -53,0 +67,0 @@ const a = [1, 2, 3];

src/GenSequence.ts

@@ -10,4 +10,6 @@
     /** reduce function see Array.reduce */
-    reduce(fnReduce: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T): Maybe<T>;
-    reduce<U>(fnReduce: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
+    reduce(fnReduce: (previousValue: T, currentValue: T, currentIndex: number) => T): Maybe<T>;
+    reduce<U>(fnReduce: (previousValue: U, currentValue: T, currentIndex: number) => U, initialValue: U): U;
+    reduceToSequence<U, V extends GenIterable<U>>(fnReduce: (previousValue: V, currentValue: T, currentIndex: number) => V, initialValue: V): Sequence<U>;
+    reduceToSequence<U>(fnReduce: (previousValue: GenIterable<U>, currentValue: T, currentIndex: number) => GenIterable<U>, initialValue: GenIterable<U>): Sequence<U>;
     scan(fnReduce: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): Sequence<T>;
@@ -43,2 +45,5 @@ scan<U>(fnReduce: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): Sequence<U>;
         },
+        reduceToSequence: <U>(fnReduce: (previousValue: GenIterable<U>, currentValue: T, currentIndex: number) => GenIterable<U>, initialValue: GenIterable<U>): Sequence<U> => {
+            return genSequence<U>(reduce<T, GenIterable<U>>(fnReduce, initialValue!, i));
+        },
         scan: <U>(fnReduce: (prevValue: U, curValue: T, curIndex: number) => U, initValue?: U) => {
@@ -45,0 +50,0 @@ return genSequence(scan(i, fnReduce, initValue));

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Improved metrics

Total package byte prevSize

54229

increased by5.04%

Lines of code

800

increased by2.83%

No dependency changes