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Best way to detect when a user leaves a web page?
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Try the onbeforeunload event: It is fired just before the page is unloaded. It also allows you to ask back if the user really wants to leave. See the demo onbeforeunload Demo.
Alternatively, you can send out an Ajax request when he leaves.
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IPN vs PDT in Paypal
...the notification. For that reason I would recommend implementing both.
With PDT you get the notification instantly and can do any additional processing required and show the user a confirmation page.
With IPN you are guaranteed to be notified that the payment was received even if the user's compu...
How can you automatically remove trailing whitespace in vim
I am getting 'trailing whitespace' errors trying to commit some files in git.
13 Answers
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Is there a shortcut on Android Studio to convert a text to uppercase?
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Select the text, then go to Edit → Toggle Case (Ctrl+Shift+U on Windows).
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Mythical man month 10 lines per developer day - how close on large projects? [closed]
...mount to actually changing/adding. whereas in a new project - you mostly write... until it's big enough and the rate decreases.
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edited Sep 27 '12 at 18:47
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Spring @Autowired usage
...Then I realized that most of the stuff in the files wasn't configuration - it was never changed anywhere after development, ever. Then I realized that "centralized" only has value in quite small systems - only in small systems will you ever be able to grok a configuration file as a whole. And what i...
How do I do word Stemming or Lemmatization?
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If you know Python, The Natural Language Toolkit (NLTK) has a very powerful lemmatizer that makes use of WordNet.
Note that if you are using this lemmatizer for the first time, you must download the corpus prior to using it. This can be done by:
>>> import nl...
Twitter Bootstrap - Tabs - URL doesn't change
I'm using Twitter Bootstrap and its "tabs".
15 Answers
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How to create a directory and give permission in single command
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edited Apr 26 '11 at 6:05
answered Apr 26 '11 at 5:33
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Segue to another storyboard?
Is it possible to segue from one storyboard to another, or to embed a storyboard in a view controller in another storyboard? I need to place a UITabBarController in a UINavigationController , and I'd like to keep them nice and separate.
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