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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...loat sY, float nfX, float nfY, float nsX, float nsY)
{
float v1x = fX-sX;
float v1y = -(fY-sY);
float v2x = nfX-nsX;
float v2y = -(nfY-nsY);
float angle1 = normalizeAngle((float) Math.atan2(v1y, v1x),v1x,v1y);
float angle2 = normalizeAngle((...
如何建立一套适合自己的高胜算交易系统 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...简单的，就是当前指数在最近一个显著运行周期内所处的位置，应用的原理就是周朝国立图书馆馆员老子先生提出的物极必反，反的高度可以根据历史统计取值。
2)组合
即持有多只个股时，每只个股占用多少资金。这里说的组...
TaifunPlayer 扩展（Audio Player）：音频播放器扩展，支持流媒体播放控制 ...
...放
播放控制：播放、暂停、停止、前进、后退、前进到位置
播放状态：检查播放状态（是否正在播放）
循环模式：设置播放循环模式
静音控制：设置播放器静音状态
时长获取：获取媒体文件的总时长和当前位置
播放...
Set Matplotlib colorbar size to match graph
...e
import numpy as np
plt.figure()
ax = plt.gca()
im = ax.imshow(np.arange(100).reshape((10,10)))
# create an axes on the right side of ax. The width of cax will be 5%
# of ax and the padding between cax and ax will be fixed at 0.05 inch.
divider = make_axes_locatable(ax)
cax = divider.append_axes(...
Fancybox doesn't work with jQuery v1.9.0 [ f.browser is undefined / Cannot read property 'msie' ]
Fancybox breaks with the new jQuery v1.9.0.
4 Answers
4
...
滚动布局管理器拓展 - ScrollArrangementHandler · App Inventor 2 中文网
...触发此事件
布局滚动到最左端()
当布局滚动到最左端位置时触发此事件
布局滚动到最右端()
当布局滚动到最右端位置时触发此事件
布局发生滚动(滚动位置X 数值)
当布局位置发生改变时触发此事件，参数为当前水平滚...
Create a tag in a GitHub repository
....
$ git tag -a v2.1.0 -m "xyz feature is released in this tag."
$ git tag
v1.0.0
v2.0.0
v2.1.0
The -m denotes message for that particular tag. We can write summary of features which is going to tag here.
Lightweight Tags:
The other way to tag commits is lightweight tag. We can do it in the foll...
How to generate unique ID with node.js
...de:
var uuid = require('uuid');
Then create some ids ...
// Generate a v1 (time-based) id
uuid.v1(); // -> '6c84fb90-12c4-11e1-840d-7b25c5ee775a'
// Generate a v4 (random) id
uuid.v4(); // -> '110ec58a-a0f2-4ac4-8393-c866d813b8d1'
** UPDATE 3.1.0
The above usage is deprecated, so use ...
How do I get currency exchange rates via an API such as Google Finance? [closed]
...0%22USDCHF%22%29
Open Source Exchange Rates API
Free for personal use (1000 hits per month)
Changing "base" (from "USD") is not allowed in Free account
Requires registration.
Request: http://openexchangerates.org/latest.json
Response:
<!-- language: lang-js -->
{
"disclaimer"...
Get user info via Google API
...tion is done, get the information from - https://www.googleapis.com/oauth2/v1/userinfo?alt=json
It has loads of stuff - including name, public profile url, gender, photo etc.
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