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How to find the sum of an array of numbers
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Recommended (reduce with default value)
Array.prototype.reduce can be used to iterate through the array, adding the current element value to the sum of the previous element values.
console.log(
[1, 2, 3, 4].reduce((a, ...
How can I horizontally align my divs?
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jQuery or javascript to find memory usage of page
... such data to you. And I think you should drop the idea simply because the complexity and inaccuracy of a "handmade" solution may introduce more problem than it solves.
Counting DOM elements or document size might be a good estimation, but it could be quite inaccurate since it wouldn't include e...
Permanently add a directory to PYTHONPATH?
...u're using (.profile or whatever, depending on your favorite shell) with a command which, again, depends on the shell in question; in Windows, you can do it through the system GUI for the purpose.
superuser.com may be a better place to ask further, i.e. for more details if you need specifics about ...
How do I detect that an iOS app is running on a jailbroken phone?
... Where does apt store its info? Or could I just call a system() command and find out. I want to find out if they have certain apps, and if they have them, then restrict the app
– conradev
Mar 6 '10 at 20:16
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.gitignore is ignored by Git
...o "know" about them even after you add them to .gitignore.
WARNING: First commit your current changes, or you will lose them.
Then run the following commands from the top folder of your Git repository:
git rm -r --cached .
git add .
git commit -m "fixed untracked files"
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Drop unused factor levels in a subsetted data frame
...if(is.factor(x)) factor(x) else x) ...Is drop.levels() much more efficient computationally or better with large data sets? (One would have to rewrite the line above in a for-loop for a huge data frame, I suppose.)
– hatmatrix
Jul 29 '09 at 17:09
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Is there a stopwatch in Java?
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91
Use Guava's Stopwatch class.
An object that measures elapsed time in nanoseconds. It is use...
Xcode 6 iPhone Simulator Application Support location
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The xcrun simctl list command can be used to see the correspondence between the simulator names and the device UDIDs. Or more specifically the xcrun simctl list devices command.
– ThomasW
Oct 2 '14 at 10:28
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What exactly does the .join() method do?
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join takes an iterable thing as an argument. Usually it's a list. The problem in your case is...