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Is there a typical state machine implementation pattern?
We need to implement a simple state machine in C .
Is a standard switch statement the best way to go?
We have a current state (state) and a trigger for the transition.
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Pythonic way to add datetime.date and datetime.time objects
...e event instance --- one holds the date, the other the time of this event, and I want to create a datetime object.
1 Answe...
Multi-line string with extra space (preserved indentation)
...c sounds more convenient for this purpose. It is used to send multiple commands to a command interpreter program like ex or cat
cat << EndOfMessage
This is line 1.
This is line 2.
Line 3.
EndOfMessage
The string after << indicates where to stop.
To send these lines to a file, use:
c...
What are best practices that you use when writing Objective-C and Cocoa? [closed]
I know about the HIG (which is quite handy!), but what programming practices do you use when writing Objective-C, and more specifically when using Cocoa (or CocoaTouch).
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Is it possible to GROUP BY multiple columns using MySQL?
...erence of left to right is applied to the ascending order of the groupings and not the column group preference. GROUP BY applies col1+col2. e.g. col1 = 1, 2, 1, 2 | col2 = 1, 2, 3, 2 and running GROUP BY col1,col2 would return 1,1|1,3|2,2 as opposed to 1,1|2,2 as suggested. Whereas GROUP BY col2, co...
Discard all and get clean copy of latest revision?
I'm moving a build process to use mercurial and want to get the working directory back to the state of the tip revision. Earlier runs of the build process will have modified some files and added some files that I don't want to commit, so I have local changes and files that aren't added to the reposi...
Avoid synchronized(this) in Java?
...unts to is that this use of this is part of your class' exposed interface, and should be documented. Sometimes the ability of other code to use your lock is desired. This is true of things like Collections.synchronizedMap (see the javadoc).
All synchronized methods within the same class use the...
What exactly does the “u” do? “git push -u origin master” vs “git push origin master”
I'm apparently terrible at using git, despite my best attempts to understand it.
4 Answers
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.war vs .ear file
What is the difference between a .war and .ear file?
9 Answers
9
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How can I tell if a DOM element is visible in the current viewport?
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Update: Time marches on and so have our browsers. This technique is no longer recommended and you should use Dan's solution if you do not need to support version of Internet Explorer before 7.
Original solution (now outdated):
This will check if ...