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SF bug #821701: reduce docs neglect a very important piece of information.

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Add a note showing which argument is the accumulator.
This commit is contained in:
Raymond Hettinger 2003-10-13 17:52:35 +00:00
parent 7decf5e5af
commit c2a2832bee
1 changed files with 3 additions and 1 deletions
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4
Doc/lib/libfuncs.tex
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@ -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