Leveraging JSR-305 null annotations to prevent NullPointerExceptions javax.annotation.CheckForNull j...

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Leveraging JSR-305 null annotations to prevent NullPointerExceptions
javax.annotation.CheckForNull
javax.annotation.Nonnull

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Leveraging JSR-305 null annotations to prevent NullPointerExceptions. The Sling API forces developers to sometimes check for null return values. Most prominently this is the case for Adaptable.adaptTo and ResourceResolver.getResource . This is often forgotten, which may lead to ...

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Gmail: After user click View message, user should be able to undo it - in limited time(30 seconds?) ...

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Gmail: After user click View message, user should be able to undo it - in limited time(30 seconds?)

After we sent one email, gmail will show: Your message has been sent. Undo View message

Usually user check "View Message" when they want to make sure the email was sent to right person, or they want to make some change to the email. -- User may want to undo the email after view message to check it.

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Where is the workspace local history stored? grep -R "word" .metadata/.plugins/org.eclipse.core.resources...

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Where is the workspace local history stored?
grep -R "word" .metadata/.plugins/org.eclipse.core.resources/.history/

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Every time you modify a file in Eclipse, a copy of the old contents is kept in the local history. At any time, you can compare or replace a file with any older version from the history. Although this is no replacement for a real code repository, it can help you out when you change or delete a ...

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9 Linux Commands & Codes To Be Wary Of http://ift.tt/1oX05nV

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9 Linux Commands & Codes To Be Wary Of
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Linux shell/terminal commands are very powerful and just a simple command could lead to one deleting a folder, files or root folder, etc. In some cases, Linux won’t even ask you for confirmation rather it will execute the command right away causing you to lose valuable data and

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