CODEWITHSUNDEEP
rubystringloops
appleLover
appleLover

Reputation: 15691

Dynamically Create String in Ruby

There is a hash {'results' => [], 'snow' => [], 'ham' => [], 'plow' => [] }

and I want to build a string dynamically (the keys may change), which has all the keys, excluding "results", which looks like this "snow + ham + plow"

How do i do this?

Upvotes: 1

Views: 161

Answers (2)

Cary Swoveland
Cary Swoveland

Reputation: 110695

Two other ways (#1 being my preference):

h = {'results' => [], 'snow' => [], 'ham' => [], 'plow' => [] }

#1

(h.keys - ['results']).join(' + ') #=> "snow + ham + plow"

#2

a = h.keys
a.delete('results')
a.join(' + ') #=> "snow + ham + plow"

Upvotes: 3

Paige Ruten
Paige Ruten

Reputation: 176733

Use Hash#keys to get the keys, Array#reject to reject the "results" one, and Array#join to join them into a String:

hash.keys.reject { |k| k == "results" }.join(" + ")

Upvotes: 3

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