Ruby 2.0 walkthrough

Ruby 2.0.0 released on 24 feb 2013, marks the 20th anniversay of Ruby.

rvm get stable
This updates your rvm to the latest stable release.
$ rvm install ruby
It update system libraries and install ruby, so when i try

$ rvm list

rvm rubies

=* ruby-1.9.3-p286 [ x86_64 ]
ruby-2.0.0-p195 [ x86_64 ]

# => - current
# =* - current && default
# * - default

Now, install rails using
gem install rails --version 4.0.0.beta1 --no-ri --no-rdoc

Comments

Cannot allocate memory error while computing files - Setup Swap space

ActionView::Template::Error (Cannot allocate memory - nodejs /tmp/execjs20131021-26716-fckzo3.js 2>&1 Nodejs is used to compile javascript at runtime. In RoR applications, this error comes when server is started in production mode which compiles the assets or while running rake assets:precompile . check for swap space and allocate

Understanding TOP command and purpose

$top top - 12:24:34 up 9 days, 21:58, 0 users, load average: 5.98, 5.32, 4.30 Tasks: 13 total, 1 running, 12 sleeping, 0 stopped, 0 zombie %Cpu(s): 5.5 us, 1.5 sy, 0.0 ni, 92.6 id, 0.0 wa, 0.0 hi, 0.5 si, 0.0 st KiB Mem: 12969522+total, 11112360+used, 18571628 free, 135900 buffers KiB Swap: 0 total, 0 used, 0 free. 49328208 cached Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 40 root 20 0 1466540 912540 12568 S 7.7 0.7 67:03.03 bundle 43 root 20 0 1413152 860252 11116 S 6.7 0.7 65:41.24 bundle The load averages indicate the average number of processes waiting for CPU time over the specified time periods. Shows running processes and their status. Buffer is the amount of data used while it's being written or read. The numbers are in KiB's showing the RAM available on system us - user process sy - system process process ID (PID), user, priority (PR), virtual memory usage (VIRT), resident memory usage (RES), shared memory usage (SHR), CPU usage (%...

RubyConf 2013 at pune..retrieved from drafts

A great experience while interacting with the ruby community from different places. Lots of knowledge and inspiration flows. Met many folks from india and abroad.

Learning curve: Work and Reflection

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