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What is the difference between buffer and cache memory in Linux?

...ed (thus the total page cache size is Cached + SwapCached). Linux performs all file I/O through the page cache. Writes are implemented as simply marking as dirty the corresponding pages in the page cache; the flusher threads then periodically write back to disk any dirty pages. Reads are implemented...
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When should I choose Vector in Scala?

It seems that Vector was late to the Scala collections party, and all the influential blog posts had already left. 6 Answ...
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change text of button and disable button in iOS

...antage of the fact that they are passed in as an argument to the IBAction calls: - (IBAction) triggerActionWithSender: (id) sender; This can be bound to the button and you’ll get the button in the sender argument when the action is triggered. If that’s not enough (because you need to access t...
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How do you unit test a Celery task?

...def add(x, y): return x + y And your test: from nose.tools import eq_ def test_add_task(): rst = add.apply(args=(4, 4)).get() eq_(rst, 8) Hope that helps! share | improve this answ...
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Pip freeze vs. pip list

...you are using a virtualenv, you can specify a requirements.txt file to install all the dependencies. A typical usage: $ pip install -r requirements.txt The packages need to be in a specific format for pip to understand, which is feedparser==5.1.3 wsgiref==0.1.2 django==1.4.2 ... That is the ...
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Html.RenderPartial giving me strange overload error?

I made a test partial page named _Test.cshtml and put it in the same directory as my view that will be calling it, here it is: ...
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How to detect the OS from a Bash script?

... and .bash_login files in version control so that I can use them between all the computers I use. The problem is I have some OS specific aliases so I was looking for a way to determine if the script is running on Mac OS X, Linux or Cygwin . ...
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How can I fix WebStorm warning “Unresolved function or method” for “require” (Firefox Add-on SDK)

... edited Apr 25 at 9:45 MARSHMALLOW 1,24022 gold badges88 silver badges2323 bronze badges answered Nov 22 '13 at 15:10 ...
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Site does not exist error for a2ensite

... You probably updated your Ubuntu installation and one of the updates included the upgrade of Apache to version 2.4.x In Apache 2.4.x the vhost configuration files, located in the /etc/apache2/sites-available directory, must have the .conf extension. Using term...
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How to find a Java Memory Leak

... supposed to be able to find the root reference ( ref ) or whatever it is called. Basically, I can tell that there are several hundred megabytes of hash table entries ([java.util.HashMap$Entry or something like that), but maps are used all over the place... Is there some way to search for large maps...