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What does the property “Nonatomic” mean?
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Take a look at the Apple Docs.
Basically, if you say nonatomic, and you generate the accessors using @synthesize, then if multiple threads try to change/read the property at once, badness can happen. You can get partially-written values or over-released/retaine...
How to terminate a window in tmux?
... This works fine: Ctrl+b &, note, that you have to confirm with y to really kill the current window incluning all panes in that window. You will get be placed inside the window that you used last before that.
– rubo77
Sep 1 '16 at 5:02
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Can't update Macports (with Mac OS X Mavericks)
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Install the "Command Line Tools" first:
sudo xcode-select --install
(Explicitly agreeing to the license is sometimes necessary via "sudo xcodebuild -license")
Then upgrade the ports:
sudo port -v selfupdate
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Post Build exited with code 1
... a fine solution since we can see the log for actual issue if anything actually occurs.
– Naveen Kumar V
Sep 2 at 15:46
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“Unsafe JavaScript attempt to access frame with URL…” error being continuously generated in Chrome w
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You could allow cross-domain requests during testing by running chrome with the --disable-web-security command line option. This should probably get rid of the error (and allow FB to spy on your testing ;)
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Check for installed packages before running install.packages() [duplicate]
...h several users on different computers. One of its lines contains the install.packages("xtable") command.
16 Answers
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Django - limiting query results
...s are lazy. That means a query will hit the database only when you specifically ask for the result.
So until you print or actually use the result of a query you can filter further with no database access.
As you can see below your code only executes one sql query to fetch only the last 10 items.
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Simulate limited bandwidth from within Chrome?
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If you are running Linux, the following command is really useful for this:
trickle -s -d 50 -w 100 firefox
The -s tells the command to run standalone, the -d 50 tells it to limit bandwidth to 50 KB/s, the -w 100 set the peak detection window size to 100 KB. firefox tells the...
Best way to hide a window from the Alt-Tab program switcher?
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go with the sample code above and make the window a child window of a small hidden tool window
modify the window style to also include the WS_EX_TOOLWINDOW extended style.
I personally prefer the second approach. Then again, I do some advanced stuff like extending the glass in the client area an...
Quick unix command to display specific lines in the middle of a file?
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Or more specifically 10 lines before: grep -B 10 ... Or 10 lines after: grep -A 10 ...
– Boy Baukema
May 21 '12 at 11:14
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