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What is the purpose of shuffling and sorting phase in the reducer in Map Reduce Programming?
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UPDATE: Since you are looking for something more official, you can also read Tom White's book "Hadoop: The Definitive Guide". Here is the interesting part for your question.
Tom White has been an Apache Hadoop committer since February 2007, and is a member of the Apache Software Foundation, so I...
How do you plot bar charts in gnuplot?
...which uses GNUPlot to create a bar graph, for absolute beginners because I read the answer and was still confused from the deluge of syntax.
We begin by writing a text file of GNUplot commands. Lets call it commands.txt:
set term png
set output "graph.png"
set boxwidth 0.5
set style fill solid
plo...
Enabling markdown highlighting in Vim
...o i included the following line in my .vimrc:
au BufNewFile,BufFilePre,BufRead *.md set filetype=markdown
Now my vim have syntax highlight for my .md files.
BufFilePre is needed for :sav
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How to debug Google Apps Script (aka where does Logger.log log to?)
...de Script Editor.
The script I was trying to get working had to do with spreadsheets - I made a spreadsheet todo-checklist type thing that sorted items by priorities and such.
The only triggers I installed for that script were the onOpen and onEdit triggers. Debugging the onEdit trigger was the ha...
How to unit test an object with database queries
... of good things" but 70% or more of my files involve database access (some read and some write) and I'm not sure how to write a unit test for these files.
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What's the advantage of Logic-less template (such as mustache)?
...sed you feel that the underscore template is simpler.. it looks a lot less readable to me. Just an opinion :-)
– Ben Clayton
May 16 '11 at 13:23
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How to create a release signed apk file using Gradle?
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task askForPasswords << {
// Must create String because System.readPassword() returns char[]
// (and assigning that below fails silently)
def storePw = new String(System.console().readPassword("Keystore password: "))
def keyPw = new String(System.console().readPassword("Key ...
Injecting $state (ui-router) into $http interceptor causes circular dependency
...s DI. Misko Hevery explains it very well in his blog; highly recommend you read it to improve your code.
– JD Smith
Nov 5 '15 at 20:25
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How to check task status in Celery?
...rom celery.result import AsyncResult
res = AsyncResult("your-task-id")
res.ready()
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What is “loose coupling?” Please provide examples
... shopping and facturation are two different contexts. When the client is ready to pay, you could have a process responsible to translate CartEntries into something meaninful for the Order. This way the Order class would also be instanciated and used without a Cart.
– plalx
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