Ruby string include? all characters -

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is there in ruby returns true if string contains whole word, in case 'hello'. dont want include? returns true if pieces present:

   'hello whats up'.include? 'll'    => true 

> 'hownowbrowncow'['now']    => "now" # nil if not found

and if want require word boundaries...

'hownowbrowncow'[/\bnow\b/]  => nil

it doesn't matter if returns true or false, since other nil or false fulfill conditional test. if true , false, well, can turn arbitrary expression true or false number of ways, 1 way is:

'now'.nil?  => false !'now'.nil? => true

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