Convert an array of strings to numbers

Map every string with Number.

JavaScript Version 1.0.0 · MIT · .md

function toNumbers(values) { return values.map(Number); }

Input & expected output

[
  "1",
  "2.5",
  "-3"
]

[
  1,
  2.5,
  -3
]

The edge case

[
  "",
  " 42 "
]

[
  0,
  42
]

Know the limits

• Number("") is 0 and surrounding spaces are ignored, as the edge case shows. Invalid strings become NaN (null in JSON) — validate user input first.

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.