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@justjavac
justjavac / img2txt.js
Last active Oct 22, 2019
img2txt:基于canvas的图片转字符画工具
View img2txt.js
var cv = document.getElementById('cv');
var c = cv.getContext('2d');
var txtDiv = document.getElementById('txt');
var fileBtn = document.getElementById("up-button");
var img = new Image();
img.src = 'a.jpg';
img.onload = init; // 图片加载完开始转换
fileBtn.onchange = getImg;
// 根据灰度生成相应字符
@justjavac
justjavac / getAddressList_QQ.js
Last active Feb 6, 2017
获取QQ群通讯录
View getAddressList_QQ.js
var ids = document.querySelectorAll(".member_id");
var names = document.querySelectorAll(".member_name");
var output = "", length = ids.length;
for(var i=0; i<length; i++){
output += ids[i].innerHTML.slice(1,-1) + ":" + names[i].innerHTML + "\n";
}
console.log(output);
View regenerator-by-bable.js
"use strict";
var _asyncGenerator = function () { function AwaitValue(value) { this.value = value; } function AsyncGenerator(gen) { var front, back; function send(key, arg) { return new Promise(function (resolve, reject) { var request = { key: key, arg: arg, resolve: resolve, reject: reject, next: null }; if (back) { back = back.next = request; } else { front = back = request; resume(key, arg); } }); } function resume(key, arg) { try { var result = gen[key](arg); var value = result.value; if (value instanceof AwaitValue) { Promise.resolve(value.value).then(function (arg) { resume("next", arg); }, function (arg) { resume("throw", arg); }); } else { settle(result.done ? "return" : "normal", result.value); } } catch (err) { settle("throw", err); } } function settle(type, value) { switch (type) { case "return": front.resolve({ value: value, done: true }); break; case "throw": front.reject(value); break; default: front.resolve({ value: value, done: false }); break; } front = front.next; if (front) { resume(front.
View array-destructuring-by-bable.js
"use strict";
var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();
function fn() {
var _data = data,
_data2 = _slicedToArray(_data, 1),
c = _data2[0];
return c;
@justjavac
justjavac / super-in-babel-typescript.js
Last active May 24, 2017
keyword super in babel and typescript
View super-in-babel-typescript.js
"use strict";
class Point {
getX() {
console.log(this.x); // C
}
}
class ColorPoint extends Point {
constructor() {
View chaos.js
// https://github.com/chaosbot/Chaos/blob/master/server/static/js/chaos.js
var canvas = document.createElement("canvas");
document.getElementsByClassName("content")[0].appendChild(canvas);
var ctx = canvas.getContext("2d");
canvas.width = 400;
canvas.height = 200;
ctx.fillStyle = "#000000";
ctx.fillRect(0, 0, canvas.width, canvas.height);
View typedarray.js
function test() {
const a = new Int32Array(10);
for (let i = 0; i < 1e6; i++) {
a.set([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
}
return a;
}
console.time('test');
test();
View destructuring_assignment.js
let reslt, x;
reslt = [...null]; // TypeError: null is not iterable
reslt = [...undefined]; // TypeError: undefined is not iterable
reslt = {...null}; // {}
reslt = {...undefined}; // {}
if (x in null) {}
// TypeError: Cannot use 'in' operator to search for 'undefined' in null
View press.one
{"sig":"32a34af259b837df4e02abb1a71bfefe6de6637a393fd3b6194a3578ede5fcb28306c9e1da1ba29ee71c3450331e960a946823525cef5eb8a8ada9a32de65f080","msghash":"f2f38ac068f4440b69248eea0bf2d8be85aa6eb9f233ca92239e28d721cbe188"}
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