Reduce - Function Summary

Summary:

Evaluates an expression or block expressions and returns the result.

Usage:

reduce value

Arguments:

value - The value argument.

Description:

When given a block, evaluates each of its expressions and returns a block with all of the results. Very useful for composing blocks of values.

values: reduce [1 + 2 3 + 4]
probe values
[3 7]

The REDUCE function is a major element of the REBOL language because it allows you to initialize blocks with values that must be computed. For example:

file: %comments.r
info: reduce [now/date size? file modified? file]
probe info
[9-Mar-2004 2966 24-Jan-2003/22:53:58-8:00]

Related:

compose - Evaluates a block of expressions, only evaluating parens, and returns a block. do - Evaluates a block, file, URL, function, word, or any other value. foreach - Evaluates a block for each value(s) in a series.