CODEWITHSUNDEEP
ruby
Srini
Srini

Reputation: 1649

Attempting to spawn processes in ruby returns NoMethod error

I am very new to ruby and I'm trying to spawn a process using the spawn command

but I encounter 

undefined method `spawn' for main:Object (NoMethodError)

when I attempt to call spawn with a single argument. I tried

sudo gem install spawn

which installed something but it returns the same error.

I'm using ruby version 1.8.7 on Ubuntu 12.04 which is what I got when I ran 

sudo apt-get install ruby

Can someone ofer some guidance?

Upvotes: 0

Views: 165

Answers (2)

Benji
Benji

Reputation: 611

You currently running Ruby version 1.8.7, Which was added in from 1.9.1.

The easiest way to managed your ruby version is via the tool called RVM

Downloading RVM (Do not sudo this command)

\curl -sSL https://get.rvm.io | bash -s stable

Then you'll need to add the location to sources(You'll probably need to reload your bash for rvm to work)

source ~/.rvm/scripts/rvm

You can install your desired version like so(replace ruby_version with one you would like to install, eg 2.1.4)

rvm install ruby_version

To list the available version on your machine

rvm list

To use a version of ruby run

rvm use ruby_version

If you have any trouble refere to the RVM website

Upvotes: 0

Uri Agassi
Uri Agassi

Reputation: 37419

The spawn API is available only on ruby version 1.9.1 and up...

Upvotes: 2

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