Einstein summation notation (was: question of style)
steve at REMOVE-THIS-cybersource.com.au
Fri Jul 17 16:54:53 CEST 2009
On Fri, 17 Jul 2009 07:12:51 -0700, Paul Rubin wrote:
> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
>> def assemble_page(header, body, footer):
>> if header or body or footer:
> Why should the processing be expensive if all three fields are empty?
Since I haven't specified an implementation for assemble_page, it could
be doing *anything*. Perhaps it has to talk to a remote database over a
slow link, perhaps it generates 300 lines of really inefficient HTML code
with no content, perhaps it sends a print job to a printer which then
warms up, cleans the print heads, and ejects a blank piece of paper.
Why does it matter? The example is about the `if` test, not about the
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