CoffeeLint rule that warn you when you accidentally overwrite outer scope variable


Description CoffeeLint rule that warns you about overwriting outer scope variable.
Node Version >= 0.10
  ✗ ./
     ⚡ #1-8: Outer scope variable overwrite. a.
✗ Lint! » 2 errors and 1 warning in 2 files

Means: Variable a assigned in 1st line and overwriten in 8th line of file.

npm install coffeelint-variable-scope

Put this in your coffeelint config:

"variable_scope": {
    "module": "coffeelint-variable-scope",
    "scopeDiff": 1

scopeDiff - Reports an error if upper and lower variable assign scope level difference is equal/bigger than scopeDiff. Default: 1.

You can "bless" certain assignments as intentional via a special coffeelint-variable-scope-ignore annotation in code. Below code will not produce any coffeelint errors:

    a = 1
    a = 2


  • It needs to be a block comment
  • It will ignore the next assignment (not line) in the code block
npm test

0.0.3 2015-03-05

  • Fix #4: Crash in destructuring assignment with splats

0.0.2 2014-10-13

  • Added coffeelint-variable-scope-ingore blessing
  • Bug fixes

0.0.1 2013-11-07 Initial release