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Apache Spark: The number of cores vs. the number of executors
...apacity
of the NodeManagers. The application master will take up a core on one
of the nodes, meaning that there won’t be room for a 15-core executor
on that node. 15 cores per executor can lead to bad HDFS I/O
throughput.
A better option would be to use --num-executors 17
--executor-cores 5 --exec...
How can I pass a Bitmap object from one activity to another
... Activity ,
How can I pass this Bitmap object from the sub-activity (the one which is going to be launched)?
10 Answers
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Use ffmpeg to add text subtitles [closed]
...
This method add subtitle to file as one of stream, so need player support to show subtitle(such as VLC)
– BollMose
Sep 28 '15 at 7:59
1
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How to add texture to fill colors in ggplot2
...s to fill colors. Is there an official ggplot2 way to do this or does anyone have a hack that they use? By textures I mean things like diagonal bars, reverse diagonal bars, dot patterns, etc that would differentiate fill colors when printed in black and white.
...
Scala: What is a TypeTag and how do I use it?
... latter checks for structural equality, which often is not what should be done because it doesn't care about things such as prefixes (like in the example).
A TypeTag is completely compiler-generated, that means that the compiler creates and fills in a TypeTag when one calls a method expecting such ...
Differences between strong and weak in Objective-C
...nly once you set the property to nil will the object get destroyed (unless one or more other objects also hold a strong reference to it).
In contrast, with a weak reference you signify that you don't want to have control over the object's lifetime. The object you are referencing weakly only lives o...
How to stop mongo DB in one command
...
If you literally want a one line equivalent to the commands in your original question, you could alias:
mongo --eval "db.getSiblingDB('admin').shutdownServer()"
Mark's answer on starting and stopping MongoDB via services is the more typical (and r...
Remove CSS “top” and “left” attributes with jQuery
....map').removeAttr('style');
However, if you're using other jQuery UI components, those may require inline styles that you don't want to be removed, so proceed with caution there.
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Copy constructor for a class with unique_ptr
...) ) {}
};
int main()
{
A a( 42 );
A b = a;
}
You can, as NPE mentioned, use a move-ctor instead of a copy-ctor but that would result in different semantics of your class. A move-ctor would need to make the member as moveable explicitly via std::move:
A( A&& a ) : up_( std::move( a....
What is the reason for having '//' in Python? [duplicate]
I saw this in someone's code:
5 Answers
5
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