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Removing viewcontrollers from navigation stack
...ave a navigation stack, with say 5 UIViewControllers. I want to remove the 3rd and 4th viewcontrollers in the stack on the click of a button in the 5th viewcontroller. Is it possible to do this? If so how?
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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...
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...
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...
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,...
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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How to select html nodes by ID with jquery when the id contains a dot?
...esktop browsers support it.
The same method does seem to work in jQuery 1.3.2, though I haven't tested it thoroughly; quickExpr doesn't pick it up, but the more involved selector parser seems to get it right:
$('#SearchBag\\.CompanyName');
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How to match all occurrences of a regex
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834
Using scan should do the trick:
string.scan(/regex/)
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How do I find out what version of WordPress is running?
...nPaul Dixon
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How can I create a copy of an object in Python?
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193
To get a fully independent copy of an object you can use the copy.deepcopy() function.
For more...