From bad497131288cded5c0456462635e06d74b7cd70 Mon Sep 17 00:00:00 2001
From: "francois.grand" <francois.grand@irstea.fr>
Date: Thu, 8 Feb 2018 08:12:49 +0100
Subject: [PATCH] =?UTF-8?q?ticket=20#36=20:=20ajout=20d'un=20iterateur=20d?=
=?UTF-8?q?e=20tableau=20commen=C3=A7ant=20par=20la=20fin?=
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---
spec/iterator.spec.ts | 40 ++++++++++++++++++++++++++++++++++++++++
src/index.ts | 1 +
src/util/iterator.ts | 25 +++++++++++++++++++++++++
tsconfig.json | 4 ++--
4 files changed, 68 insertions(+), 2 deletions(-)
create mode 100644 spec/iterator.spec.ts
create mode 100644 src/util/iterator.ts
diff --git a/spec/iterator.spec.ts b/spec/iterator.spec.ts
new file mode 100644
index 00000000..68dce8db
--- /dev/null
+++ b/spec/iterator.spec.ts
@@ -0,0 +1,40 @@
+/// <reference path="../node_modules/@types/jasmine/index.d.ts" />
+
+import { ArrayReverseIterator } from "../src/util/iterator";
+
+describe('iterator : ', () => {
+ it("reverse ( undefined )", () => {
+ const arr: Object[] = undefined;
+ const it = new ArrayReverseIterator<Object>(arr);
+ expect(it.next().done).toBeTruthy();
+ });
+
+ it("reverse( [] )", () => {
+ const arr: Object[] = [];
+ const it = new ArrayReverseIterator<Object>(arr);
+ expect(it.next().done).toBeTruthy();
+ });
+
+ it("reverse( [1] )", () => {
+ const arr: number[] = [1];
+ const it = new ArrayReverseIterator<number>(arr);
+ const v1 = it.next();
+ expect(v1.done).toBeFalsy();
+ expect(v1.value).toEqual(1);
+ const v2 = it.next();
+ expect(v2.done).toBeTruthy();
+ });
+
+ it("reverse( [1,2] )", () => {
+ const arr: number[] = [1, 2];
+ const it = new ArrayReverseIterator<number>(arr);
+ const v1 = it.next();
+ expect(v1.done).toBeFalsy();
+ expect(v1.value).toEqual(2);
+ const v2 = it.next();
+ expect(v2.done).toBeFalsy();
+ expect(v2.value).toEqual(1);
+ const v3 = it.next();
+ expect(v3.done).toBeTruthy();
+ });
+});
diff --git a/src/index.ts b/src/index.ts
index 3443109f..a939be42 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -22,3 +22,4 @@ export * from "./util/pair";
export * from "./util/interval";
export * from "./pab/pab_dimension";
export * from "./pab/pab_puissance";
+export * from "./util/iterator";
diff --git a/src/util/iterator.ts b/src/util/iterator.ts
new file mode 100644
index 00000000..71a7cfa8
--- /dev/null
+++ b/src/util/iterator.ts
@@ -0,0 +1,25 @@
+export class ArrayReverseIterator<T> implements IterableIterator<T> {
+ private _index: number;
+
+ constructor(private _arr: any[]) {
+ this._index = this._arr == undefined ? 0 : this._arr.length - 1;
+ }
+
+ public next(): IteratorResult<T> {
+ if (this._arr != undefined && this._index >= 0) {
+ return {
+ done: false,
+ value: this._arr[this._index--]
+ }
+ } else {
+ return {
+ done: true,
+ value: null
+ }
+ }
+ }
+
+ [Symbol.iterator](): IterableIterator<T> {
+ return this;
+ }
+}
diff --git a/tsconfig.json b/tsconfig.json
index e5b05034..c345304b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,6 +1,6 @@
{
"compilerOptions": {
- "target": "es5",
+ "target": "es6",
"module": "commonjs",
"outDir": "./build",
"noImplicitAny": true,
@@ -12,4 +12,4 @@
"exclude": [
"node_modules"
]
-}
+}
\ No newline at end of file
--
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