(undefined method `+@' for []:Array)

Question

I'm getting a very strange error message when I try to iterate through an array of objects. The error is

NoMethodError (undefined method `+@' for []:Array):

Here is the code of that loop.

#go through items and see if there are any corresponding offers 
    #All matches are stored in a hash
    items.each do |itemsi|
        bestoffer = -1
        matchescounter++ #matchescounter only get incredmented when all the offers have been taken care of
        offers.each do |offs|
        if itemsi.togive.to_str == offs.totake.to_str
            if offs.togive.to_int > bestoffer
                bestoffer = offs.togive.to_int
                matches[matchescounter].store(itemi, offer)         
            end#if
        end#if
        end#offers loop
    end#items loop

I don't have +@ anywhere in my code. Strange

JRL · Accepted Answer · 2009-09-16 03:19:20Z

11

There is no ++ operator in Ruby.

And the error message is actually quite clear: it says that the method named '+@' does not exist for your instance of the Array type. '+@' is the actual name of the unary plus instance method, which is defined for the Numeric type, but not for Array.

edited Sep 16, 2009 at 3:19

answered Sep 16, 2009 at 3:06

JRL

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1 Comment

Pat R Over a year ago

Thanks, that was my java getting back into my head.

Okomikeruko · Accepted Answer · 2020-06-20 17:56:28Z

0

I came across a similar error today.

NoMethodError (undefinded method `-@' for []:Array)

I had copy-pasted a %w array declaration from my HAML document into a ruby console to verify its formatting, and failed to notice that I included the - at the beginning.

answered Jun 20, 2020 at 17:56

Okomikeruko

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Comments

Shankar Thyagarajan · Accepted Answer · 2020-09-21 10:12:56Z

0

I got this error when I put a =+ instead of a += while adding 2 arrays

edited Sep 21, 2020 at 10:12

answered Aug 26, 2020 at 11:55

Shankar Thyagarajan

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