J Kenneth King wrote:
Chris Rebert <c...@rebertia.com> writes:
Python 2.6 (r26:66714, Nov 18 2008, 21:48:52)
[GCC 4.0.1 (Apple Inc. build 5484)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
bool(-1)
True
str.find() returns -1 on failure (i.e. if the substring is not in the
given string).
-1 is considered boolean true by Python.
That's an odd little quirk... never noticed that before.
I just use regular expressions myself.
Wouldn't this be something worth cleaning up? It's a little confusing
for failure to evaluate to boolean true even if the relationship isn't
direct.
str.find() returns the index (position) where the substring was found.
Because string indexes start at 0 the returned value is -1 if it's not
found.
In those languages where string indexes start at 1 the returned value is
0 if not found.
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