From c2a2832bee2d30119981d7924223823b3f099662 Mon Sep 17 00:00:00 2001 From: Raymond Hettinger Date: Mon, 13 Oct 2003 17:52:35 +0000 Subject: SF bug #821701: reduce docs neglect a very important piece of information. Add a note showing which argument is the accumulator. --- Doc/lib/libfuncs.tex | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex index 936a023..a9f3a65 100644 --- a/Doc/lib/libfuncs.tex +++ b/Doc/lib/libfuncs.tex @@ -816,7 +816,9 @@ class C(object): Apply \var{function} of two arguments cumulatively to the items of \var{sequence}, from left to right, so as to reduce the sequence to a single value. For example, \code{reduce(lambda x, y: x+y, [1, 2, - 3, 4, 5])} calculates \code{((((1+2)+3)+4)+5)}. If the optional + 3, 4, 5])} calculates \code{((((1+2)+3)+4)+5)}. The left argument, + \var{x}, is the accumulated value and the right argument, \var{y}, + is the update value from the \var{sequence}. If the optional \var{initializer} is present, it is placed before the items of the sequence in the calculation, and serves as a default when the sequence is empty. If \var{initializer} is not given and -- cgit v0.12