INTERVIEW QUESTIONS PROGRAMMING LANGUAGES RUBY DETAILS

Question: What is the use of load and require in Ruby?

Answer: require 'rake'

will cause ruby to look for one of the files rake.rb or rake.so in the
directories listed in $:. The script in bin is called simply rake, not
rake.rb, and so require doesn't even consider it.

load, instead, interpret its argument in a different way: it considers
it to
be the whole basename of the file and doesn't try to add any extension
to it.
So, the line

load 'rake'

will make ruby look for a file called 'rake' (not rake.rb as before) in
the
directories listed in $:. This time bin/rake has the correct name and is
loaded.

require 'rake'

will cause ruby to look for one of the files rake.rb or rake.so in the
directories listed in $:. The script in bin is called simply rake, not
rake.rb, and so require doesn't even consider it.

load, instead, interpret its argument in a different way: it considers
it to
be the whole basename of the file and doesn't try to add any extension
to it.
So, the line

load 'rake'

will make ruby look for a file called 'rake' (not rake.rb as before) in
the
directories listed in $:. This time bin/rake has the correct name and is
loaded. Source: CoolInterview.com

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