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Java String to SHA1
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return result;
}
BTW, you may get more compact representation using Base64. Apache Commons Codec API 1.4, has this nice utility to take away all the pain. refer here
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二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...字符，数字，日文，中文等等。这两天学习了一下二维码图片生成的相关细节，觉得这个玩意就是一个密码算法，在此写一这篇文章 ，揭露一下。供好学的人一同学习之。
关于QR Code Specification，可参看这个PDF：http://raidenii.net/f...
What is the “FS”/“GS” register intended for?
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The appendix analogy is really bad based on outdated science; it's related to the immune system, so definitely not "vestigial". It detracts from the actual post. Other than that, it's a good response.
– code_dredd
Dec 6 '...
Why does an NSInteger variable have to be cast to long when used as a format argument?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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What is the LD_PRELOAD trick?
...load a library that does something completely radically different from the base library as though to emulate some other system.
– Joshua
Nov 26 '13 at 15:35
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Kill child process when parent process is killed
...nable to run this in 64bit mode. Here I posted a working example, which is based on this.
– Alexander Yezutov
Feb 6 '12 at 17:55
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【App Inventor 2 数据可视化】使用柱状图和饼图收集数据 - App应用开发 - ...
...ot;#ffc107">sadButton</font>做同样的操作。用下面的图片检查你的工作。编码Reset按钮。
当按“Reset”键，会将所有变量重置为0。用下图检查你的代码。拖动barGraphData2D，重置柱状图。从barGraphData2D抽屉中清除:
使用相同的...
Using vagrant to run virtual machines with desktop environment
My company's development environment is based on virtual machines, running on VirtualBox. We would like to move one step further, and use the capabilities of Vagrant to have the description of the machine in a text file and then be able to "raise" that machine based on that text file. Combined to pu...
Pandas read_csv low_memory and dtype options
...: int, "username": "string"})
ValueError: invalid literal for long() with base 10: 'foobar'
dtypes are typically a numpy thing, read more about them here:
http://docs.scipy.org/doc/numpy/reference/generated/numpy.dtype.html
What dtypes exists?
We have access to numpy dtypes: float, int, bool, time...
How to convert numbers between hexadecimal and decimal
... @ColeJohnson int.Parse doesn't have an option for you to specify the base as an int, just as one of a few valid NumberStyles. For base 16, either is just fine, but as a general solution, it's good to know how both work.
– Tim S.
Oct 21 '13 at 20:44
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