infimum-by ( ... seq quot: ( ... elt -- ... x ) -- ... elt )
Factor handbook » The language » Collections » Sequence operations » Sequence combinators

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Vocabulary
sequences

Inputs

seq	a sequence
quot	a quotation

Outputs

elt

an object

Word description
Outputs the least element of seq according to the quot.

Examples
Example:

USING: sequences prettyprint ; { { 1 2 } { 1 2 3 } { 1 2 3 4 } } [ length ] infimum-by .
{ 1 2 }

Errors
Throws an error if the sequence is empty.

See also
min, max, infimum, supremum, supremum-by

Definition

USING: math.order sequences.private ;

IN: sequences

: infimum-by
    ( ... seq quot: ( ... elt -- ... x ) -- ... elt )
    [ before? ] select-by ; inline