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What is the Ruby (spaceship) operator?
...ther language that supports it. Basically instead of returning 1 (true) or 0 (false) depending on whether the arguments are equal or unequal, the spaceship operator will return 1, 0, or −1 depending on the value of the left argument relative to the right argument.
a <=> b :=
if a < b t...
乐高 EV3 实验06 - 屏幕表情与音效，让机器人有点性格 · App Inventor 2 中文网
...索 乐高 EV3 实验06 - 屏幕表情与音效，让机器人有点性格
实验06：屏幕表情与音效
这个实验做完你会得到什么
一、器材清单
二、界面组...
JavaScript + Unicode regexes
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205
Situation for ES 6
The upcoming ECMAScript language specification, edition 6, includes Unicode-...
Declaring variables inside or outside of a loop
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多点触控使用指导 · App Inventor 2 中文网
...点触控
不可见组件：同时追踪最多 10 个触摸点——每个手指按下、移动、松开都触发事件，并带上「触摸点序号」和坐标；
同时识别常用手势：滑动（上下左右）、双击、长按、双指缩放、双指旋转。
可用...
How to sleep for five seconds in a batch file/cmd [duplicate]
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How do I get the current date in JavaScript?
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var today = new Date();
var dd = String(today.getDate()).padStart(2, '0');
var mm = String(today.getMonth() + 1).padStart(2, '0'); //January is 0!
var yyyy = today.getFullYear();
today = mm + '/' + dd + '/' + yyyy;
document.write(today);
This will give you today's date in the forma...
How to split a long regular expression into multiple lines in JavaScript?
... split into multiple lines in my JavaScript code to keep each line length 80 characters according to JSLint rules. It's just better for reading, I think.
Here's pattern sample:
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Append integer to beginning of list in Python [duplicate]
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联网 App 第 3 课：点击挑战排行榜，字典存成绩、破纪录才写回、按分数排序...
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这一课学什么
准备
第一步：10 秒小游戏（这一课新增）
第二步：成绩表是一个字典
第三步：破纪录才写回
第四步：排出名次
跑起来看看
常见问题
动手改一改
下一课
用到的组件
验证...