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How to hash a string into 8 digits?
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answered Apr 15 '13 at 6:17
Raymond HettingerRaymond Hettinger
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What does the star operator mean, in a function call?
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932
The single star * unpacks the sequence/collection into positional arguments, so you can do this...
How to re-raise an exception in nested try/except blocks?
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132
As of Python 3 the traceback is stored in the exception, so a simple raise e will do the (mostl...
Ineligible Devices section appeared in Xcode 6.x.x
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32 Answers
32
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How can I obtain an 'unbalanced' grid of ggplots?
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73
grid.arrange draws directly on the device; if you want to combine it with other grid objects you...
Why do I get an UnsupportedOperationException when trying to remove an element from a List?
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1032
Quite a few problems with your code:
On Arrays.asList returning a fixed-size list
From the AP...
Using Rails 3.1 assets pipeline to conditionally use certain css
I’m in the process of building my first solo Rails app using Rails 3.1.rc5. My problem is that I want to have my site render the various CSS files conditionally. I’m using Blueprint CSS and I’m trying to have sprockets/rails render screen.css most of the time, print.css only when printing,...
程序员之网络安全系列（二）：如何安全保存用户密码及哈希算法 - 更多技术 ...
...码试一下上面的第二点 （MD5是一种常用的Hash算法)
2.2.3 :003 > require 'digest/md5.so'
=> true
2.2.3 :004 > puts Digest::MD5.hexdigest('I love you')
e4f58a805a6e1fd0f6bef58c86f9ceb3
=> nil
2.2.3 :005 > puts Digest::MD5.hexdigest('I love you!')
690a8cda8894e37a6fff4d1790d53b...
How can I resolve “Error: No developer directory found at /Developer”?
I just upgraded XCode to 4.3.1.
I'm using a script to build (and then deploy through Testflight) my app.
But I now receive this error:
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ANTLR: Is there a simple example?
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Note: this answer is for ANTLR3! If you're looking for an ANTLR4 example, then this Q&A demo...