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同志们，学好FPGA，去做高频交易开发，还是有希望的 - 更多技术 - 清泛网 -...
...样的挑战，把握好机会哦！
www.wizardquant.com
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来源：http://www.newsmth.net/nForum/#!article/METech/275766FPGA 高频交易 量化
[es6] import, export, default cheatsheet - 更多技术 - 清泛网 - 专注C/C++及内核技术
... { Lib } from 'lib';
export default class Main {
// ....
}
参考：http://2ality.com/2014/09/es6-modules-final.htmlreact export import
App Inventor 2 手机蓝牙及语音控制 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
来源：http://www.zsqz.com/chuangke/13.htm【学习目标】
1.掌握蓝牙客户端或服务端组件的使用；
2.学会编写手机蓝牙APP，并向Arduino发送控制指令；
3.学会编写手机语音控制程序，并能通过语音控制Arduino等设备。 【...
Java enum - why use toString instead of name
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
CSS: 100% font size - 100% of what?
...6px), which may not have been intended.
This can help in the explanation:
http://www.w3.org/TR/2011/REC-CSS2-20110607/syndata.html#value-def-percentage
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python numpy ValueError: operands could not be broadcast together with shapes
...s not conflict with anything.
For more information on broadcasting rules: http://docs.scipy.org/doc/numpy/user/basics.broadcasting.html
(Please note that if X and y are of type numpy.matrix, then asterisk can be used as matrix multiplication. My recommendation is to keep away from numpy.matrix, it...
Pretty printing XML in Python
...
print etree.tostring(x, pretty_print=True)
Check out the lxml tutorial:
http://lxml.de/tutorial.html
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Is String.Format as efficient as StringBuilder
...t a proper comparison.
This chap, Jerry Dixon, did some benchmarking:
http://jdixon.dotnetdevelopersjournal.com/string_concatenation_stringbuilder_and_stringformat.htm
Updated:
Sadly the link above has since died. However there's still a copy on the Way Back Machine:
http://web.archive.o...
Java - Convert integer to string [duplicate]
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String.valueOf(number) (my preference)
"" + number (I don't know how the compiler handles it, perhaps it is as efficient as the above)
Integer.toString(number)
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HTML5 Canvas Resize (Downscale) Image High Quality?
...
Here's the code to do the pixel perfect downscaling :
fiddle result :
http://jsfiddle.net/gamealchemist/r6aVp/embedded/result/
fiddle itself : http://jsfiddle.net/gamealchemist/r6aVp/
// scales the image by (float) scale < 1
// returns a canvas containing the scaled image.
function downScal...