On Wed, Apr 23, 2008 at 10:06 PM, Nicholas T <[EMAIL PROTECTED]> wrote:
...
> > > > >>> time=1901248
> > > > >>> reduce(lambda a, b: a[:-1] + [a[-1]%b, math.floor(a[-1]/b)],
> [[time],
> > > > 60, 60, 24])
> > > > [28, 7.0, 0.0, 22.0] # secs, mins, hrs, days
...
> It wasn't only posted to be cryptic, it's one thing that's difficult to
> write with a for loop without a lot of verbosity (at least I couldn't figure
> out how to do it...).
def dhms1(t):
r = []
for d in 60, 60, 24:
r.append(t % d)
t //= d
r.append(t)
return r
>>> dhms1(1901248)
[28, 7, 0, 22]
vs
import math
def dhms2(t):
return reduce(lambda a, b: a[:-1] + [a[-1]%b,
math.floor(a[-1]/b)], [[t], 60, 60, 24])
>>> dhms2(1901248)
[28, 7.0, 0.0, 22.0]
Not sure why you consider it advantageous to get a mixed list with the
first item guaranteed to be an int vs the other three guaranteed to be
floats with a 0 fractional part; the simple approach gives a list of
four ints, which seems a much saner idea to me.
Apart from that, putting each snippet into a string (resp. x for
dhms1, y for dhms2) I see:
>>> len(x)
119
>>> len(y)
117
Is 119 vs 117 characters "a LOT of verbosity"...?! OK, then what about...:
>>> import re
>>> len(re.sub(r'\s','',x))
67
>>> len(re.sub(r'\s','',y))
97
The conceptually simple approach is WAY SHORTER if you only count
non-space characters (is whitespace "verbosity"...?!).
If you're really SO keen to minimize the count of characters, I
suspect Perl is much closer to your tastes than Python is (or, God
willing, will EVER be).
Alex
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