Andrew Makhorin wrote:
Xypron,
Thank you for your efforts.
I will try to summarize our proposals and prepare some more or less
detailed description of all new built-in functions to be added to the
language. It will take several days, I hope.
BTW, do you know how this feature is implemented in AMPL? I could not
find anything in the internet.
Andrew Makhorin
Hello Andrew,
I found the following in
Robert Fourer, Ampl: A Modeling Language for Mathematical Programming, 2002
p 458, Table A2: Build-in arithmetic functions
ctime() - current time as string
ctime(t) - time t as string
time - current time in seconds
Further information can be found at
http://www.netlib.org/ampl/looping/NEW_CMDS
ctime() = ctime(time()) = current time, a string formatted as in
# 'Sat Jul 27 23:37:43 1996'
# time() = current time in seconds (numeric)
# from a system-dependent origin, shown by
# ctime(0) (often 1 January 1970 GMT).
Time formats differ vastly. Hence I guest implementing a function which
allow to parse many different formats is crucial. This is why I used a
second parameter to specify the format. The time format provided by AMPL
does not conform with ISO 8601 and might therefore not be usable for
further processing.
Best regards
Xypron
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