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vector::at vs. vector::operator[]
I know that at() is slower than [] because of its boundary checking, which is also discussed in similar questions like C++ Vector at/[] operator speed or ::std::vector::at() vs operator[] << surprising results!! 5 to 10 times slower/faster! . I just don't understand what the at() met...
How do I merge changes to a single file, rather than merging commits?
...B with the same files but a different programming interface in some files. Now the methods of file f, which is independent of the interface differences in the two branches, were changed in branch B, but the change is important for both branches. Thus, I need to merge just file f of branch B into fil...
How to use '-prune' option of 'find' in sh?
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+1 finally found out why I need -print at end, I can now stop adding \! -path <pattern> in addition to -prune
– Miserable Variable
May 14 '13 at 20:39
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Detect Chrome extension first run / update
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Updated answer to reflect v3 of manifest:
Chromium now has a chrome.runtime set of APIs, which allow you to fetch the version of the extension.
To get the current version:
chrome.runtime.getManifest().version
To listen when the extension has been first installed, when th...
Types in MySQL: BigInt(20) vs Int(20)
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` it affects only the ZEROFILL option:` now my curiosity ends
– Umair Ayub
Jul 5 '16 at 10:42
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Remove/Add Line Breaks after Specific String using Sublime Text
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Seems so obvious now... thanks a million! Also, @Mauro - I'm on Windows, and I can used ctrl + d to select the next iteration of the selection. Perhaps the same functionality exists on MAC with Command + d ? You may have to press it numerous ...
How to watch for a route change in AngularJS?
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$locationChangeStart and $locationChangeSuccess are now documented! docs.angularjs.org/api/ng.$location
– J.P. ten Berge
Dec 13 '13 at 9:38
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Using “super” in C++
...nned in the question, I have still to find an interesting use to that. For now, I only see it as a hack, but it was worth mentioning, if only for the differences with Java (where you can't chain "super").
– paercebal
Oct 8 '08 at 7:50
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Apply multiple functions to multiple groupby columns
... 0.687672 1.754877 0.672401
Using apply and returning a Series
Now, if you had multiple columns that needed to interact together then you cannot use agg, which implicitly passes a Series to the aggregating function. When using apply the entire group as a DataFrame gets passed into the fu...
SQL select only rows with max value on a column [duplicate]
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I know that MySQL allows you to add non aggregate fields to a "grouped by" query, but I find that kinda pointless. Try running this select id, max(rev), rev from YourTable group by id and you see what I mean. Take your time and ...