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What is the most effective way to get the index of an iterator of an std::vector?
... narrow class of iterators: random-access iterators. (This is what you get now from std::vector)
If you use distance, your algorithm will support a much wider class of iterators: input iterators.
Of course, calculating distance for non-random-access iterators is in general case an inefficient oper...
Efficient way to determine number of digits in an integer
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Well, the most efficient way, presuming you know the size of the integer, would be a lookup. Should be faster than the much shorter logarithm based approach. If you don't care about counting the '-', remove the + 1.
// generic solution
template <class T>
int nu...
How to create streams from string in Node.Js?
...ue('your string').end()
// Pass stream around:
callback(null, stream)
// Now that a consumer has attached, remember to resume the stream:
stream.resume()
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Counting the occurrences / frequency of array elements
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}
console.log(counts[5], counts[2], counts[9], counts[4]);
So, now your counts object can tell you what the count is for a particular number:
console.log(counts[5]); // logs '3'
If you want to get an array of members, just use the keys() functions
keys(counts); // returns ["5", "2", ...
What is SuppressWarnings (“unchecked”) in Java?
...ype (this is the only thing it can verify, so it verifies only that).
But now add this line.
Integer hello = actualList.get(0);
And JVM will throw an unexpected ClassCastException, as Java compiler inserted an implicit cast.
java.lang.ClassCastException: java.base/java.lang.String cannot be cas...
Comet implementation for ASP.NET? [closed]
...'s persistent connectivity, but there is a team looking at Comet scenarios now. Also look at Aaron Lerch's blog as I believe he's done some early Comet work in ASP.NET.
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qmake: could not find a Qt installation of ''
...t4-qmake' instead of 'qmake' (I found both of them in the directory path). Now its working :)
– Curious
May 17 '13 at 12:00
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How to prevent the activity from loading twice on pressing the button
...ssing after starting new activity.. That's why the screen turns out black. Now if you want to avoid that black screen, you should show a progress dialog at the start of activity and do the long processing in a separate thread (i.e. UI Thread or Simply use async class). Once your processing is done h...
How to run Conda?
...t .bash_profile (I downloaded it to my local desktop to do that, I do not know how to text edit a file from linux)
Then add this to .bash_profile:
PATH=$PATH:$HOME/anaconda/bin
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How to remove a directory from git repository?
...l this delete the directory from the point it was added to repository till now? Or is it just to remove the directory and recommit it to the .git repo?
– alpha_989
Jan 21 '18 at 18:15
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