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What is the difference between the kernel space and the user space?

... The really simplified answer is that the kernel runs in kernel space, and normal programs run in user space. User space is basically a form of sand-boxing -- it restricts user programs so they can't mess with memory (and other reso...
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Download a file from NodeJS Server using Express

...press.static('public')); // <-- This right here }); And then just put all your files inside that 'public' folder, for example: /public/docs/my_word_doc.docx And then a regular old link will allow the user to download it: <a href="public/docs/my_word_doc.docx">My Word Doc</a> ...
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How to print the contents of RDD?

...save in a single file, you can coalesce you RDD into one partition before calling saveAsTextFile, but again this may cause issues. I think the best option is to write in multiple files in HDFS, then use hdfs dfs --getmerge in order to merge the files – Oussama ...
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How to set JAVA_HOME in Linux for all users

... For all users, I would recommend placing the following line in /etc/profile export JAVA_HOME=$(readlink -f /usr/bin/javac | sed "s:/bin/javac::") This will update dynamically and works well with the alternatives system. Do not...
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“Deprecation warning: moment construction falls back to js Date” when trying to convert RFC2822 date

...Date('Wed, 23 Apr 2014 09:54:51 +0000')); The last option is a built-in fallback that Moment supports for now, with the deprecated console warning. They say they won't support this fallback in future releases. They explain that using new Date('my date') is too unpredictable. ...
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Pythonic way to find maximum value and its index in a list?

...many options, for example: import operator index, value = max(enumerate(my_list), key=operator.itemgetter(1)) share | improve this answer | follow | ...
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Algorithm for creating a school timetable

...ere are known solutions for algorithm of creating a school timetable. Basically, it's about optimizing "hour-dispersion" (both in teachers and classes case) for given class-subject-teacher associations. We can assume that we have sets of classes, lesson subjects and teachers associated with each ot...
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Deserialize JSON with C#

I'm trying to deserialize a Facebook friend's Graph API call into a list of objects. The JSON object looks like: 10 Answ...
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Difference Between One-to-Many, Many-to-One and Many-to-Many?

...to a skill, but the skill need not relate back to just those people. Typically it would, but such symmetry is not a requirement. Take love, for example -- it is bi-directional ("I-Love", "Loves-Me"), but often asymmetric ("I love her, but she doesn't love me")! All of these are well supported by H...
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Get the current script file name

... Just use the PHP magic constant __FILE__ to get the current filename. But it seems you want the part without .php. So... basename(__FILE__, '.php'); A more generic file extension remover would look like this... function chopExtension($filename) { ...