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create-square-aa.js: 四角形のASCII Artを生成する
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| /** | |
| * create-square-aa-1.0.1.js | |
| * create ASCII art square. | |
| * | |
| * @version 1.0.1 | |
| * @author think49 | |
| * @url https://gist.github.com/think49/2a30b4e865f3dca4043440fb9b99a448 | |
| * @license http://www.opensource.org/licenses/mit-license.php (The MIT License) | |
| */ | |
| 'use strict'; | |
| var createSquareAa = (function (_min) { | |
| return function createSquareAa (width, height, x, y, radius) { | |
| var min = _min, canvas ='', whiteMark = '〇', blackMark = '◎', widthPlus, currentWidth, remainingHeight, whiteLine, leftWhiteLine, whiteWidth, whiteHeight, blackLine, blackSideLine, blackInnerWidth, blackInnerHeight; | |
| width = +width || 0; | |
| height = +height || 0; | |
| x = +x || 0; | |
| y = +y || 0; | |
| radius = +radius || 0; | |
| widthPlus = width + 1; | |
| whiteLine = '\n'.padStart(widthPlus, whiteMark); | |
| whiteWidth = x - radius; | |
| whiteHeight = y - radius; | |
| if (whiteWidth >= width || whiteHeight >= height) { | |
| return ''.padEnd(widthPlus * height, whiteLine); | |
| } | |
| canvas = ''.padEnd(widthPlus * whiteHeight, whiteLine); | |
| remainingHeight = height - (whiteHeight > 0 ? whiteHeight : 0); | |
| blackInnerWidth = radius * 2 - 1; | |
| if (whiteHeight >= 0) { | |
| leftWhiteLine = ''.padEnd(whiteWidth, whiteMark); | |
| blackLine = leftWhiteLine.padEnd(min(whiteWidth + blackInnerWidth + 2, width), blackMark).padEnd(width, whiteMark) + '\n'; | |
| canvas += blackLine; | |
| if (! --remainingHeight) { | |
| return canvas; | |
| } | |
| } | |
| if (radius > 0) { | |
| blackInnerHeight = min(blackInnerWidth, whiteHeight + blackInnerWidth + 1, remainingHeight); | |
| if (blackInnerHeight > 0) { | |
| // console.log(blackInnerWidth, blackInnerHeight) | |
| leftWhiteLine = leftWhiteLine || ''.padEnd(whiteWidth, whiteMark); | |
| currentWidth = whiteWidth + 1; | |
| blackSideLine = leftWhiteLine.padEnd(min(currentWidth, width), blackMark).padEnd(min(currentWidth += blackInnerHeight, width), whiteMark).padEnd(min(++currentWidth, width), blackMark).padEnd(width, whiteMark) + '\n'; | |
| remainingHeight -= blackInnerHeight; | |
| canvas += blackSideLine.padEnd(widthPlus * blackInnerHeight, blackSideLine); | |
| if (!remainingHeight) { | |
| return canvas; | |
| } | |
| } | |
| if (blackInnerHeight >= 0) { | |
| canvas += blackLine || (leftWhiteLine || ''.padEnd(whiteWidth, whiteMark)).padEnd(min(whiteWidth + blackInnerWidth + 2, width), blackMark).padEnd(width, whiteMark) + '\n'; | |
| } | |
| if (!--remainingHeight) { | |
| return canvas; | |
| } | |
| } | |
| return canvas.padEnd(widthPlus * height, whiteLine); | |
| }; | |
| }(Math.min)); |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <title>test - create-square-aa.js</title> | |
| <style> | |
| pre { | |
| color: black; | |
| background-color: #eee; | |
| font-size: 50px; | |
| font-family: monospace; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <pre id="canvas"></pre> | |
| <script src="create-square-aa-1.0.1.js"></script> | |
| <script> | |
| 'use strict'; | |
| function appendTextNode (element, string) { | |
| var doc = element.ownerDocument; | |
| element.appendChild(doc.createTextNode(string + '\n\n')); | |
| } | |
| function main () { | |
| var canvas = this.document.getElementById('canvas') | |
| console.assert(createSquareAa(5, 5, 2, 2, 0) === '〇〇〇〇〇\n〇〇〇〇〇\n〇〇◎〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n'); // 5x5 中央位置(半径0) | |
| console.assert(createSquareAa(5, 5, 2, 2, 1) === '〇〇〇〇〇\n〇◎◎◎〇\n〇◎〇◎〇\n〇◎◎◎〇\n〇〇〇〇〇\n'); // 5x5 中央位置(半径1) | |
| console.assert(createSquareAa(5, 5, 2, 1, 1) === '〇◎◎◎〇\n〇◎〇◎〇\n〇◎◎◎〇\n〇〇〇〇〇\n〇〇〇〇〇\n'); // 5x5 上にシフトする(半径1) | |
| console.assert(createSquareAa(5, 5, 2, 0, 1) === '〇◎〇◎〇\n〇◎◎◎〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n'); | |
| console.assert(createSquareAa(5, 5, 2, -1, 1) === '〇◎◎◎〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n'); | |
| console.assert(createSquareAa(5, 5, 2, -2, 1) === '〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n'); | |
| console.assert(createSquareAa(5, 5, 3, 2, 1) === '〇〇〇〇〇\n〇〇◎◎◎\n〇〇◎〇◎\n〇〇◎◎◎\n〇〇〇〇〇\n'); // 5x5 右にシフトする(半径1) | |
| console.assert(createSquareAa(5, 5, 4, 2, 1) === '〇〇〇〇〇\n〇〇〇◎◎\n〇〇〇◎〇\n〇〇〇◎◎\n〇〇〇〇〇\n'); | |
| console.assert(createSquareAa(5, 5, 5, 2, 1) === '〇〇〇〇〇\n〇〇〇〇◎\n〇〇〇〇◎\n〇〇〇〇◎\n〇〇〇〇〇\n'); | |
| console.assert(createSquareAa(5, 5, 6, 2, 1) === '〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n'); | |
| console.assert(createSquareAa(5, 5, 1, 2, 1) === '〇〇〇〇〇\n◎◎◎〇〇\n◎〇◎〇〇\n◎◎◎〇〇\n〇〇〇〇〇\n'); // 5x5 左にシフトする(半径1) | |
| console.assert(createSquareAa(5, 5, 0, 2, 1) === '〇〇〇〇〇\n◎◎〇〇〇\n〇◎〇〇〇\n◎◎〇〇〇\n〇〇〇〇〇\n'); | |
| console.assert(createSquareAa(5, 5, -1, 2, 1) === '〇〇〇〇〇\n◎〇〇〇〇\n◎〇〇〇〇\n◎〇〇〇〇\n〇〇〇〇〇\n'); | |
| console.assert(createSquareAa(5, 5, -2, 2, 1) === '〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n'); | |
| console.assert(createSquareAa(5, 5, 2, 3, 1) === '〇〇〇〇〇\n〇〇〇〇〇\n〇◎◎◎〇\n〇◎〇◎〇\n〇◎◎◎〇\n'); // 5x5 下にシフトする(半径1) | |
| console.assert(createSquareAa(5, 5, 2, 4, 1) === '〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇◎◎◎〇\n〇◎〇◎〇\n'); | |
| console.assert(createSquareAa(5, 5, 2, 5, 1) === '〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇◎◎◎〇\n'); | |
| console.assert(createSquareAa(5, 5, 2, 6, 1) === '〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n'); | |
| console.assert(createSquareAa(5, 5, 2, 2, 2) === '◎◎◎◎◎\n◎〇〇〇◎\n◎〇〇〇◎\n◎〇〇〇◎\n◎◎◎◎◎\n'); // 5x5 中央位置(半径2) | |
| console.assert(createSquareAa(5, 5, 2, 2, 3) === '〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n〇〇〇〇〇\n'); // 5x5 中央位置(半径3) | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, 2, 0)); // 5x5 中央位置(半径0) | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, 2, 1)); // 5x5 中央位置(半径1) | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, 1, 1)); // 5x5 上にシフトする(半径1) | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, 0, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, -1, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, -2, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, 3, 2, 1)); // 5x5 右にシフトする(半径1) | |
| appendTextNode(canvas, createSquareAa(5, 5, 4, 2, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, 5, 2, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, 6, 2, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, 1, 2, 1)); // 5x5 左にシフトする(半径1) | |
| appendTextNode(canvas, createSquareAa(5, 5, 0, 2, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, -1, 2, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, -2, 2, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, 3, 1)); // 5x5 下にシフトする(半径1) | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, 4, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, 5, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, 6, 1)); | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, 2, 2)); // 5x5 中央位置(半径2) | |
| appendTextNode(canvas, createSquareAa(5, 5, 2, 2, 3)); // 5x5 中央位置(半径3) | |
| } | |
| main.call(this); | |
| </script> | |
| </body> | |
| </html> |
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teratail
teratailの下記質問の要件を元にコードを書きました。
Polyfill
本コードでは、ES2017 規定の
String.prototype.padStart,String.prototype.padEndを利用しており、未対応ブラウザの為にPolyfillが必要となります。ベンチマーク
「キャンバスサイズの最大値: 1010 (※1)」「繰り返し回数: 1000回」でベンチマークをとってみました。
Lhankor_Mhy(初版), te2ji(type1 初版) に手を加えたコードの結果がこちら。
次の環境で実行しています。
(※1) テキストボックス入力値は「1000」ですが、関数 benchmark の処理で +10 しています。0x0のキャンバスでは有効値が取れないと思われる為の措置です。
(※2) ベンチマーク処理の都合上、引数の順番等の処理を一部変更しています。特に、raccyさんのコードは設計思想が大きく異なり、
rectサイズを指定する為に追加処理を入れています。