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NoMethodError: undefined method `[]' for nil:NilClass

New Here ,
May 09, 2023 May 09, 2023

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Hi there,

I'm having a hard time using the CSS auto compilation for SCSS. I have just one scss file and it has been working like a charm in my current project for the last month or so, but now I just get the error: 
NoMethodError: undefined method `[]' for nil:NilClass

on line – – and column 1

 

I can't see any error in my scss what so ever, and Dreamweaver don't give me any input that something should be wrong either. How do I debug this?!

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Community Expert ,
May 09, 2023 May 09, 2023

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More info please. What does line -- look like?

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New Here ,
May 09, 2023 May 09, 2023

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I don't really understand which line is even "line --", which makes the error a bit hard for me to understand and find 😕 

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Community Expert ,
May 09, 2023 May 09, 2023

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This error occurs when you are trying to access an array value that does not exist. The error message "undefined method `[]' for nil:NilClass" indicates that the variable you are trying to access is nil, or undefined.

 

To solve this error, you can do the following:

  1. Make sure the variable is defined: Check if the variable you are trying to access is defined and has a value assigned to it. If it is not defined, assign a value to it before trying to access its values.
  2. Check the array index: Make sure that the index you are trying to access exists in the array. If the index is out of bounds, it will result in this error.
  3. Check the syntax: Review your code for any syntax errors that might be causing the issue.
  4. Use safe navigation operator: You can use the safe navigation operator &. which will return nil instead of raising an error if the object is nil.

 

For example, instead of writing:

variable = nil
value = variable[0]


You can write:

variable = nil
value = variable&.[](0)


This will ensure that if variable is nil, it will return nil without raising an error.

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