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How to read multiple text files into a single RDD?
I want to read a bunch of text files from a hdfs location and perform mapping on it in an iteration using spark.
10 Answers...
Is multiplication and division using shift operators in C actually faster?
...turely. Build what is sematically clear, identify bottlenecks and optimise from there...
– Dave
Jun 15 '11 at 15:20
4
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How can I add reflection to a C++ application?
...iterate over the fields we use the visitor pattern. We create an MPL range from 0 to the number of fields, and access the field data at that index. Then it passes the field data on to the user-provided visitor:
struct field_visitor
{
template<class C, class Visitor, class I>
void oper...
NAnt or MSBuild, which one to choose and when?
... to figure out how to edit the build script source (*.*proj file) directly from within Visual Studio. With NAnt I just have Visual Studio treat the .build script as an XML file.
Apparently, in Visual Studio, Web Application Projects don't get a *.*proj file by default, so I had great difficulty figu...
Circular gradient in android
I'm trying to make a gradient that emits from the middle of the screen in white, and turns to black as it moves toward the edges of the screen.
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How to delete from a text file, all lines that contain a specific string?
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Thanks, but it doesn't seem to erase it from the file but just print out the text file contents without that string.
– A Clockwork Orange
Mar 23 '11 at 20:03
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How is Docker different from a virtual machine?
...sources, a full VM is the way to go. If you just want to isolate processes from each other and want to run a ton of them on a reasonably sized host, then Docker/LXC/runC seems to be the way to go.
For more information, check out this set of blog posts which do a good job of explaining how LXC works...
Find object by id in an array of JavaScript objects
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Use the find() method:
myArray.find(x => x.id === '45').foo;
From MDN:
The find() method returns the first value in the array, if an element in the array satisfies the provided testing function. Otherwise undefined is returned.
If you want to find its index instead, use findInd...
ACE vs Boost vs POCO [closed]
...a problem for Boost.
I never used ACE, so I can't really comment on it. From what I've heard, people find POCO more modern and easier to use than ACE.
Some answers to the comments by Rahul:
I don't know about versatile and advanced. The POCO thread library provides some functionality that is ...
JavaScript function similar to Python range()
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For a very simple range in ES6:
let range = n => Array.from(Array(n).keys())
From bigOmega's comment, this can be shortened using Spread syntax:
let range = n => [...Array(n).keys()]
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