Remove falsy values from array

Filter with Boolean.

JavaScript Version 1.0.0 · MIT · .md

function removeFalsy(values) { return values.filter(Boolean); }

Input & expected output

[
  "[email protected]",
  "",
  null,
  "[email protected]",
  0,
  false
]

[
  "[email protected]",
  "[email protected]"
]

The edge case

[]

[]

Know the limits

• 0 and "" are falsy too — filter explicitly when they are valid values.

The function above is the implementation used by the lab. The lab validates JSON types and caps size before execution; include equivalent validation when accepting untrusted input in your application.

Keep exploring

• Clone an array — Create a new array without copying the objects inside it.
• Remove duplicate values — Keep the first occurrence of each value, in its original order.
• Flatten a nested array — Turn a nested array into one sequence of values.