What does wrong number of arguments 1 for 0 mean in Ruby

Question

What does  Argument Error  wrong number of arguments  1 for 0   mean

User · Answer

I assume you called a function with an argument which was defined without taking any   def f     puts  hello world  end  f 1       lt   wrong number of arguments  1 for 0

User · Answer

If you change from using a lambda with one argument to a function with one argument  you will get this error   For example   You had   foobar   lambda do  baz    puts baz end   and you changed the definition to   def foobar baz    puts baz end   And you left your invocation as   foobar call baz    And then you got the message  ArgumentError  wrong number of arguments  0 for 1    when you really meant   foobar baz

User · Answer

You passed an argument to a function which didn t take any  For example   def takes no arguments end  takes no arguments 1   ArgumentError  wrong number of arguments  1 for 0

User · Answer

When you define a function  you also define what info  arguments  that function needs to work  If it is designed to work without any additional info  and you pass it some  you are going to get that error   Example  Takes no arguments   def dog end   Takes arguments   def cat name  end   When you call these  you need to call them with the arguments you defined   dog                   works fine cat  Fluffy           works fine   dog  Fido             Returns ArgumentError  1 for 0  cat                   Returns ArgumentError  0 for 1    Check out the Ruby Koans to learn all this

[ruby] What does "wrong number of arguments (1 for 0)" mean in Ruby?

Examples related to ruby