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Chaining multiple MapReduce jobs in Hadoop
...rs for the job.
I think that the above method might however be the way the now older mapred API did it, but it should still work. There will be a similar method in the new mapreduce API but i'm not sure what it is.
As far as removing intermediate data after a job has finished you can do this in your...
In Vim is there a way to delete without putting text in the register?
...remap P "*P
vnoremap y "*y
vnoremap Y "*Y
vnoremap p "*p
vnoremap P "*P
Now I yank to and put from the clipboard register, and don't have to care what happens with the default register. An added benefit is that I can paste from other apps with minimal hassle. I'm losing some functionality, I know...
Escape a string for a sed replace pattern
...PED_REPLACE=$(printf '%s\n' "$REPLACE" | sed -e 's/[\/&]/\\&/g')
# Now you can use ESCAPED_REPLACE in the original sed statement
sed "s/KEYWORD/$ESCAPED_REPLACE/g"
If you ever need to escape the KEYWORD string, the following is the one you need:
sed -e 's/[]\/$*.^[]/\\&/g'
And can be...
Convert pandas dataframe to NumPy array
I am interested in knowing how to convert a pandas dataframe into a NumPy array.
15 Answers
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MYSQL Truncated incorrect DOUBLE value
...ery was like this:
UPDATE myTable SET myValue = NULL WHERE myValue = 0;
Now, since the actual type of myValue is VARCHAR(255) this gives the warning:
+---------+------+-----------------------------------------------+
| Level | Code | Message |
+---------+-...
How can I cast int to enum?
...
@FlySwat, what if YourEnum is dynamic and will only be known at runtime, and what I want is to convert to Enum?
– Shimmy Weitzhandler
Feb 19 '12 at 9:56
235
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What's the difference between Perl's backticks, system, and exec?
...ere you want to fetch STDOUT, STDERR or the return code, you can use well known standard modules like IPC::Open2 and IPC::Open3.
Example:
use IPC::Open2;
my $pid = open2(\*CHLD_OUT, \*CHLD_IN, 'some', 'cmd', 'and', 'args');
waitpid( $pid, 0 );
my $child_exit_status = $? >> 8;
Finally, IPC:...
How to make a programme continue to run after log out from ssh? [duplicate]
...am in the background and a message is displayed confirming that.
You can now log out and it will continue running..
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iOS: Access app-info.plist variables in code
...aryKey:@"CFBundleVersion"];
There is a gotcha in that the version number now has two attributes in the info.plist - but you get the idea? If you view your info.plist as source code (right click the info.plist - select Open As) then you will get to see all the various key names you can use.
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Android studio Gradle build speed up
...are working on it. Like I posted in this answer the fastest solution right now is to use gradle from the command line and you should switch to binary libs for all modules you do not develop. On g+ there is a discussion with the developers about it.
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