@ts-common/iterator - npm Package Compare versions

Comparing version 0.0.45 to 0.1.0

dist/index.d.ts

 import { Tuple2 } from "@ts-common/tuple";
+export interface IteratorResult<T> {
+    readonly done: boolean;
+    readonly value: T;
+}
+export interface Iterator<T> {
+    readonly next: () => IteratorResult<T>;
+}
+export interface Iterable<T> {
+    readonly [Symbol.iterator]: () => Iterator<T>;
+}
 export declare const iterable: <T>(createIterator: () => Iterator<T>) => Iterable<T>;
@@ -3,0 +13,0 @@ export declare type Entry<T> = Tuple2<number, T>;

dist/index.js

@@ -6,59 +6,47 @@ "use strict";
 exports.entry = tuple_1.tuple2;
-exports.entries = (input) => {
-    function* iterator() {
-        // tslint:disable-next-line:no-if-statement
-        if (input === undefined) {
-            return;
-        }
-        let index = 0;
-        /* tslint:disable-next-line:no-loop-statement */
-        for (const value of input) {
-            yield exports.entry(index, value);
-            /* tslint:disable-next-line:no-expression-statement */
-            ++index;
-        }
+exports.entries = (input) => exports.iterable(function* () {
+    // tslint:disable-next-line:no-if-statement
+    if (input === undefined) {
+        return;
     }
-    return exports.iterable(iterator);
-};
-exports.map = (input, func) => {
-    function* iterator() {
-        /* tslint:disable-next-line:no-loop-statement */
-        for (const [index, value] of exports.entries(input)) {
-            yield func(value, index);
-        }
+    let index = 0;
+    /* tslint:disable-next-line:no-loop-statement */
+    for (const value of input) {
+        yield exports.entry(index, value);
+        /* tslint:disable-next-line:no-expression-statement */
+        ++index;
     }
-    return exports.iterable(iterator);
-};
+});
+exports.map = (input, func) => exports.iterable(function* () {
+    /* tslint:disable-next-line:no-loop-statement */
+    for (const [index, value] of exports.entries(input)) {
+        yield func(value, index);
+    }
+});
 exports.drop = (input, n = 1) => exports.filter(input, (_, i) => n <= i);
-exports.flatten = (input) => {
-    function* iterator() {
+exports.flatten = (input) => exports.iterable(function* () {
+    // tslint:disable-next-line:no-if-statement
+    if (input === undefined) {
+        return;
+    }
+    /* tslint:disable-next-line:no-loop-statement */
+    for (const v of input) {
         // tslint:disable-next-line:no-if-statement
-        if (input === undefined) {
-            return;
+        if (v !== undefined) {
+            yield* v;
         }
-        /* tslint:disable-next-line:no-loop-statement */
-        for (const v of input) {
-            // tslint:disable-next-line:no-if-statement
-            if (v !== undefined) {
-                yield* v;
-            }
-        }
     }
-    return exports.iterable(iterator);
-};
+});
 // tslint:disable-next-line:readonly-array
 exports.concat = (...input) => exports.flatten(input);
-exports.takeWhile = (input, func) => {
-    function* iterator() {
-        /* tslint:disable-next-line:no-loop-statement */
-        for (const [index, value] of exports.entries(input)) {
-            /* tslint:disable-next-line:no-if-statement */
-            if (!func(value, index)) {
-                return;
-            }
-            yield value;
+exports.takeWhile = (input, func) => exports.iterable(function* () {
+    /* tslint:disable-next-line:no-loop-statement */
+    for (const [index, value] of exports.entries(input)) {
+        /* tslint:disable-next-line:no-if-statement */
+        if (!func(value, index)) {
+            return;
         }
+        yield value;
     }
-    return exports.iterable(iterator);
-};
+});
 exports.take = (input, n = 1) => exports.takeWhile(input, (_, i) => i < n);
@@ -79,11 +67,8 @@ exports.find = (input, func) => {
 exports.filter = (input, func) => exports.flatMap(input, (v, i) => func(v, i) ? [v] : []);
-const infinite = () => {
-    function* iterator() {
-        /* tslint:disable-next-line:no-loop-statement */
-        while (true) {
-            yield;
-        }
+const infinite = () => exports.iterable(function* () {
+    /* tslint:disable-next-line:no-loop-statement */
+    while (true) {
+        yield;
     }
-    return exports.iterable(iterator);
-};
+});
 exports.generate = (func, count) => exports.map(exports.takeWhile(infinite(), (_, i) => i !== count), (_, i) => func(i));
@@ -111,23 +96,20 @@ exports.repeat = (v, count) => exports.generate(() => v, count);
 /* tslint:disable-next-line:readonly-array */
-exports.zip = (...inputs) => {
-    function* iterator() {
-        const iterators = inputs.map(i => i === undefined ? [][Symbol.iterator]() : i[Symbol.iterator]());
+exports.zip = (...inputs) => exports.iterable(function* () {
+    const iterators = inputs.map(i => i === undefined ? [][Symbol.iterator]() : i[Symbol.iterator]());
+    /* tslint:disable-next-line:no-loop-statement */
+    while (true) {
+        const result = new Array(inputs.length);
         /* tslint:disable-next-line:no-loop-statement */
-        while (true) {
-            const result = new Array(inputs.length);
-            /* tslint:disable-next-line:no-loop-statement */
-            for (const [index, it] of exports.entries(iterators)) {
-                const v = it.next();
-                /* tslint:disable-next-line:no-if-statement */
-                if (v.done) {
-                    return;
-                }
-                /* tslint:disable-next-line:no-object-mutation no-expression-statement */
-                result[index] = v.value;
+        for (const [index, it] of exports.entries(iterators)) {
+            const v = it.next();
+            /* tslint:disable-next-line:no-if-statement */
+            if (v.done) {
+                return;
             }
-            yield result;
+            /* tslint:disable-next-line:no-object-mutation no-expression-statement */
+            result[index] = v.value;
         }
+        yield result;
     }
-    return exports.iterable(iterator);
-};
+});
 // TypeScript gives an error in case if type of a and type of b are different
@@ -134,0 +116,0 @@ exports.isStrictEqual = (a, b) => a === b;

package.json

 {
   "name": "@ts-common/iterator",
-  "version": "0.0.45",
+  "version": "0.1.0",
   "description": "Iterator library for JavaScript and TypeScript",
@@ -49,3 +49,3 @@ "main": "dist/index.js",
   "devDependencies": {
-    "@types/chai": "^4.1.6",
+    "@types/chai": "^4.1.7",
     "@types/mocha": "^5.2.5",
@@ -57,8 +57,8 @@ "chai": "^4.2.0",
     "tslint": "^5.11.0",
-    "tslint-immutable": "^4.8.0",
-    "typescript": "^3.1.3"
+    "tslint-immutable": "^4.9.1",
+    "typescript": "^3.1.6"
   },
   "dependencies": {
-    "@ts-common/tuple": "^0.0.0"
+    "@ts-common/tuple": "^0.0.2"
   }
 }

src/index.ts

 import { Tuple2, tuple2 } from "@ts-common/tuple"
 
+export interface IteratorResult<T> {
+    readonly done: boolean;
+    readonly value: T;
+}
+
+export interface Iterator<T> {
+    readonly next: () => IteratorResult<T>;
+}
+
+export interface Iterable<T> {
+    readonly [Symbol.iterator]: () => Iterator<T>;
+}
+
 export const iterable = <T>(createIterator: () => Iterator<T>): Iterable<T> =>
@@ -10,4 +23,4 @@ ({ [Symbol.iterator]: createIterator })
 
-export const entries = <T>(input: Iterable<T>|undefined): Iterable<Entry<T>> => {
-    function *iterator(): Iterator<Entry<T>> {
+export const entries = <T>(input: Iterable<T>|undefined): Iterable<Entry<T>> =>
+    iterable(function *(): Iterator<Entry<T>> {
         // tslint:disable-next-line:no-if-statement
@@ -24,5 +37,3 @@ if (input === undefined) {
         }
-    }
-    return iterable(iterator)
-}
+    })
 
@@ -32,4 +43,4 @@ export const map = <T, I>(
     func: (v: I, i: number) => T,
-): Iterable<T> => {
-    function *iterator(): Iterator<T> {
+): Iterable<T> =>
+    iterable(function *(): Iterator<T> {
         /* tslint:disable-next-line:no-loop-statement */
@@ -39,5 +50,3 @@ for (const [index, value] of entries(input)) {
         }
-    }
-    return iterable(iterator)
-}
+    })
 
@@ -47,4 +56,4 @@ export const drop = <T>(input: Iterable<T>|undefined, n: number = 1): Iterable<T> =>
 
-export const flatten = <T>(input: Iterable<Iterable<T>|undefined>|undefined): Iterable<T> => {
-    function *iterator(): Iterator<T> {
+export const flatten = <T>(input: Iterable<Iterable<T>|undefined>|undefined): Iterable<T> =>
+    iterable(function *(): Iterator<T> {
         // tslint:disable-next-line:no-if-statement
@@ -61,5 +70,3 @@ if (input === undefined) {
         }
-    }
-    return iterable(iterator)
-}
+    })
 
@@ -73,4 +80,4 @@ // tslint:disable-next-line:readonly-array
     func: (v: T, i: number) => boolean,
-): Iterable<T> => {
-    function *iterator(): Iterator<T> {
+): Iterable<T> =>
+    iterable(function *(): Iterator<T> {
         /* tslint:disable-next-line:no-loop-statement */
@@ -84,5 +91,3 @@ for (const [index, value] of entries(input)) {
         }
-    }
-    return iterable(iterator)
-}
+    })
 
@@ -127,9 +132,7 @@ export const take = <T>(input: Iterable<T>|undefined, n: number = 1) =>
 
-const infinite = (): Iterable<void> => {
-    function *iterator(): Iterator<void> {
+const infinite = (): Iterable<void> =>
+    iterable(function *(): Iterator<void> {
         /* tslint:disable-next-line:no-loop-statement */
         while (true) { yield }
-    }
-    return iterable(iterator)
-}
+    })
 
@@ -163,3 +166,4 @@ export const generate = <T>(func: (i: number) => T, count?: number): Iterable<T> =>
         (a, b, i) => a !== undefined ? func(a, b, i) : b,
-        undefined)
+        undefined,
+    )
 
@@ -195,4 +199,4 @@ export const last = <T>(input: Iterable<T>|undefined): T|undefined =>
 /* tslint:disable-next-line:readonly-array */
-export const zip = <T>(...inputs: Array<Iterable<T>|undefined>): Iterable<ReadonlyArray<T>> => {
-    function *iterator(): Iterator<ReadonlyArray<T>> {
+export const zip = <T>(...inputs: Array<Iterable<T>|undefined>): Iterable<ReadonlyArray<T>> =>
+    iterable(function *(): Iterator<ReadonlyArray<T>> {
         const iterators = inputs.map(
@@ -216,5 +220,3 @@ i => i === undefined ? [][Symbol.iterator]() : i[Symbol.iterator](),
         }
-    }
-    return iterable(iterator)
-}
+    })
 
@@ -221,0 +223,0 @@ // TypeScript gives an error in case if type of a and type of b are different

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Worsened metrics

Total package byte prevSize

40163

decreased by-0.22%

Lines of code

416

decreased by-2.12%

Dependency changes

• + Added@ts-common/tuple@0.0.2(transitive)

• - Removed@ts-common/tuple@0.0.0(transitive)

• Updated@ts-common/tuple@^0.0.2