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noSparseArray

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Diagnostic Category: lint/suspicious/noSparseArray

JavaScript (and super languages)

Since: v1.0.0

Sources:

Same as: no-sparse-arrays

Description

Disallow sparse arrays

Examples

Invalid

[1,,2]

code-block.js:1:1 lint/suspicious/noSparseArray  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This array contains an empty slot.
  
  > 1 │ [1,,2]
      │ ^^^^^^
    2 │ 
  
  ℹ Unsafe fix: Replace hole with undefined
  
    1 │ [1,·undefined,2]
      │    ++++++++++

How to configure

{
  "linter": {
    "rules": {
      "suspicious": {
        "noSparseArray": "error"
      }
    }
  }
}