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corneliatt
New Participant
May 9, 2023
Question

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

  • May 9, 2023
  • 1 reply
  • 586 views

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?!

This topic has been closed for replies.

1 reply

BenPleysier
BenPleysier
Braniac
May 9, 2023

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

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C
corneliattAuthor
New Participant
May 9, 2023

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

BenPleysier
BenPleysier
Braniac
May 9, 2023

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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