GigaGerard's profile - activity

Yes a reserved set of names, keywords, of course. I looked at Haskell and it has all its functions out in the open, I like Java better with its neat classes.

Yes, I had a variable there somewhere called len and then I changed its name but it was still in what you call the global scope I guess as I repasted the codes from the Worksheet and then len([1,2,3]) was 3 again. Didn't know I couldn't call the function len then, a name that should be avoided is not so object-oriented!

I can understand DSM has touched the root of the problem, with the ceil(log(4,2))
Still: 2.5 seconds average cputime on a 2GHz CPU is an exceptionally long time lag! It happened every time I tried but under very specific circumstances as described above. Oh, and the myfunction(num) was called from the textfield below.

Sage 4.7.2 in Windows, I hope this helps. Thank you!

I was programming functions in Sage for Big numbers and found a few bugs.
I emailed Jason-sage and he suggested this forum.
I hope my contributions can help building a better system.
I run Sage 4.7.2 in a new Firefox offline via the Oracle Virtual Box for Fedora on an old Windows Vista, so that could have something to do with it.

BUG:
Suddenly the Python len(list) function wasn't working anymore on a simple [1,2,3]
array.
SOLUTION:
I repasted the same code on a new Worksheet and the len() function could be called again.

BUG:
I had output that was becoming very slow for mysterious reasons (a 2 to 3 seconds time lag) for some simple small values. I used t = cputime() before and cputime(t) after blocks of code and found the responsible...
CODE INSIDE FUNCTION:

def myfunction(num):              # stops for up to 3 seconds if num == 4
    t = cputime();
    sad = ceil(log(num, 2));
    print(cputime(t));

for m in range(2,12):
    myfunction(m);

The problem is the ceil() around the log() I believe, but why at 4 and why only when that 4 is a function argument (not a local variable or a hard-coded 4) that is originally part of a range array?
SOLUTION:

    happy = ceil(log(num+0, 2));

These bugs seem to an innocent amateur like me that Sage is an unstable system.
However, I love the potential of this software!
Best Regards, GigaGerard