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What is the purpose of shuffling and sorting phase in the reducer in Map Reduce Programming?
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First of all shuffling is the process of transfering data from the mappers to the reducers, so I think it is obvious that it is necessary for the reducers, since otherwise, they wouldn't be able to have any input (or input from every ...
Prevent unit tests but allow integration tests in Maven
...out skipping failsafe tests.
Property value seems to magically default to false -->
<skipTests>${skip.surefire.tests}</skipTests>
</configuration>
</plugin>
This allows you to run mvn verify -Dskip.surefire.tests and only surefire, not failsa...
jQuery remove all list items from an unordered list
I forgot the jQuery command that will clear all list elements from a list. I did a bit of searching, done it a bunch of times before, but just simply forgot the command.
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Background color not showing in print preview
...ings can be done to avoid the difficulties you are having. First, separate all your print CSS from your screen CSS. This is done via the @media print and @media screen.
Often times just setting up some extra @media print CSS is not enough because you still have all your other CSS included when prin...
Grepping a huge file (80GB) any way to speed it up?
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Here are a few options:
1) Prefix your grep command with LC_ALL=C to use the C locale instead of UTF-8.
2) Use fgrep because you're searching for a fixed string, not a regular expression.
3) Remove the -i option, if you don't need it.
So your command becomes:
LC_ALL=C fgrep -A 5 -...
onchange event on input type=range is not triggering in firefox while dragging
... Just note that with this solution, in chrome you will get two calls to the handler (one per event), so if you care for that, then you need to guard against it.
– Jaime
Mar 24 '14 at 17:46
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The most efficient way to implement an integer based power function pow(int, int)
...gt;= on a signed int does zero-padding or sign-extension - C compilers are allowed to pick either behaviour).
– user9876
Jul 28 '09 at 16:42
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How to use regex with find command?
.... For example 81397018-b84a-11e0-9d2a-001b77dc0bed.jpg. I want to find out all these images using "find" command:
7 Answers...
Detail change after Git pull
...ction of the git-rev-parse man page), so that you can do things like
See all of the changes: git diff master@{1} master
See the changes to a given file: git diff master@{1} master <file>
See all the changes within a given directory: git diff master@{1} master <dir>
See the summary of c...
PostgreSQL LIKE query performance variations
...ull Text Search with its full text indexes is not for the LIKE operator at all, it has its own operators and doesn't work for arbitrary strings. It operates on words based on dictionaries and stemming. It does support prefix matching for words, but not with the LIKE operator:
Get partial match fro...