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irb(main):107:0* a = []
=> []
irb(main):108:0> a.find 'awesome'
NoMethodError: No method 'call' on an instance of String.
   from Kernel(String)#call (method_missing_cv) at kernel/core/kernel.rb:652
   from Enumerable(Array)#find at kernel/core/enumerable.rb:252
   from Object#irb_binding {} at (irb):108
irb(main):109:0> b = ['rubyiasdfas']
=> ["rubyiasdfas"]
irb(main):110:0> b.find 'zero?'
LocalJumpError: not callable
   from NilClass#call at kernel/core/misc.rb:41
   from Enumerable(Array)#find {} at kernel/core/enumerable.rb:251
   from Array#each at kernel/core/array.rb:572
   from Enumerable(Array)#find at kernel/core/enumerable.rb:251
   from Object#irb_binding {} at (irb):110
irb(main):111:0>