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Delete the first three rows of a dataframe in pandas
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drop can even be calculated in-place (without extra assignment). Faster and simpler!
– tim
Jun 13 '14 at 18:24
1
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When is assembly faster than C?
...Editor's note: more likely the FP latency bottleneck is enough to hide the extra cost of loop. Doing two Kahan summations in parallel for the odd/even elements, and adding those at the end, could maybe speed this up by a factor of 2.)
Whoops, I was running a slightly different version of the code ...
Git: How to edit/reword a merge commit's message?
...t means that if you want to actually add a note to a merge, you have to do extra work. So people don't.
Note that, before Git 2.17 (Q2 2018), "git rebase -p" mangled log messages of a merge commit, which is now fixed.
See commit ed5144d (08 Feb 2018) by Gregory Herrero (``).
Suggested-by: Vegar...
LinkedBlockingQueue vs ConcurrentLinkedQueue
... we use bounded queue, in unbounded queue take() and put() merely consumes extra resource( interms of synchronization ) than ConcurrentLinkedQueue . although it is the case to use bounded queues for Producer-consumer scenarios
– amarnath harish
Aug 14 '18 at 9:...
What is a JavaBean exactly?
... @worldsayshi - No, it's not required. For example a bean can contain a String; and String is not a bean. (String is immutable, so you cannot create it by calling an empty constructor and a setter.) It seems reasonable that a Serializable object should have Serializable members, unless it somehow...
Why are preprocessor macros evil and what are the alternatives?
...can't be debugged.
When you have a macro that translates to a number or a string, the source code will have the macro name, and many debuggers, you can't "see" what the macro translates to. So you don't actually know what is going on.
Replacement: Use enum or const T
For "function-like" macros,...
Find a string by searching all tables in SQL Server Management Studio 2008
Is there any way to search for a string in all tables of a database in SQL Server Management Studio 2008?
8 Answers
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In AngularJS, what's the difference between ng-pristine and ng-dirty?
...ss cognitive step to comprehend than !ng-hide. your brain needs to do that extra step and thus you more likely to introduce bugs
– Damian Green
Aug 20 '14 at 8:32
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How to get Resource Name from Resource id
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In your Activity, try these:
to get string like radio1:
getResources().getResourceEntryName(int resid);
to get string like com.sample.app:id/radio1:
getResources().getResourceName(int resid);
In Kotlin Now :
val name = v.context.resources.getResourceEnt...
What are the differences between utf8_general_ci and utf8_unicode_ci? [duplicate]
...tf8_general_ci is fine only for Russian and Bulgarian subset of Cyrillic.
Extra letters used in Belarusian, Macedonian, Serbian, and Ukrainian
are sorted not well.
The cost of utf8_unicode_ci is that it is a little bit
slower than utf8_general_ci. But that’s the price you pay for correctness...