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Why would iterating over a List be faster than indexing through it?
...m3 -> etc.
To access item3, you can see clearly that you need to walk from the head through every node until you reach item3, since you cannot jump directly.
Thus, if I wanted to print the value of each element, if I write this:
for(int i = 0; i < 4; i++) {
System.out.println(list.get(...
Key existence check in HashMap
... return null;
}
Just check if the return value for get() is different from null.
This is the HashMap source code.
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What is CMake equivalent of 'configure --prefix=DIR && make all install '?
... @bodacydo location of the folder with CMakeLists.txt we're generating from.
– Kamiccolo
Dec 16 '14 at 15:22
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How does Go update third-party packages?
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A use case being: I just want to update all my packages that are obtained from the Github VCS, then you would just say:
go get -u github.com/... // ('...' being the wildcard).
This would go ahead and only update your github packages in the current $GOPATH
Same applies for within a VCS too, sa...
How to change the status bar color in Android?
...on device pre-lollipop thanks to the library support-v7-appcompat starting from version 21. Blogpost about support appcompat v21 from Chris Banes
Read more about the Material Theme on the official Android Developers website
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How to get MVC action to return 404
...00 (the not found page was found... :-( ). I tend to throw the exception from say BlogController and have the NotFound action set the proper response code.
– Nigel Sampson
Jun 1 '10 at 22:26
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Correct way to populate an Array with a Range in Ruby
.... But this creates another array inside the array, I simply want the range from 2 to 25. Yet if I try order << (2.25) I get the error can't convert Range into Integer.
– kakubei
Nov 10 '11 at 14:29
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How can I get the current user's username in Bash?
...oks at the user attached to stdin. However, if you are running a batch job from cron, or you are running a startup script as a different user than root, then these will either output the wrong user (root) or nothing at all. This answer will return the correct value regardless by looking at process's...
How to fire AJAX request Periodically?
... trick. I wanted to highlight a bit more advanced technique that I learned from this excellent video by Paul Irish: http://paulirish.com/2010/10-things-i-learned-from-the-jquery-source/
For periodic tasks that might end up taking longer than the repeat interval (like an HTTP request on a slow conne...
How to play a notification sound on websites?
... @Stefan That's correct but may be confusing. I'll remove that from my answer. Thanks for the hint.
– Timo
Apr 11 '12 at 16:09
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