MinimalBy

MinimalBy[data, f] returns a list of the elements e_i of data for which the value of f is minimal.

MinimalBy[data, f, n] returns a list of the elements corresponding to the n smallest f[e_i].

MinimalBy[f] represents an operator form of MinimalBy that can be applied to an expression.

Examples

Find minimal elements:

MinimalBy[{1, -2, 3, -4}, Abs]
(* {1} *)

Find elements with shortest length:

MinimalBy[{"a", "bb", "ccc", "dd"}, StringLength]
(* {"a"} *)

Please visit the official Wolfram Language Reference for more details.