[CentralOH] 2013-05-09 道場 Scribbles 落書/惡文?
jep200404 at columbus.rr.com
jep200404 at columbus.rr.com
Fri May 10 14:55:46 CEST 2013
2 is somebody's favorite number because it is the only even prime number
17 is the only random prime
seed for pseudo random sequence good for unit tests
There were five former/student/wannabe financial quant folks and
three copies of PfDA present.
Jim <bowtie> Rogers in Singapore; Mandarin Chinese
WX
MADIS microclimate http://madis.noaa.gov/
java ucar unidata for nexrad
http://www.unidata.ucar.edu/
beaufort scale
lat/long
gradians/meters
degrees/nautical mile
HRAP grid @#$@%^&^#$^!!!
simplecv face detection in five lines simplecv.org
pep 7 - C style guide
-- is option to say no more options.
E.g. mv -- -f foo to rename file named '-f' to foo.
cohpy at dojo:~$ mkdir d
cohpy at dojo:~$ cd d
cohpy at dojo:~/d$ >-f
cohpy at dojo:~/d$ ll
total 0
-rw-rw-r-- 1 cohpy cohpy 0 May 10 08:18 -f
cohpy at dojo:~/d$ mv -f foo
mv: missing destination file operand after `foo'
Try `mv --help' for more information.
cohpy at dojo:~/d$ mv -- -f foo
cohpy at dojo:~/d$ ll
total 0
-rw-rw-r-- 1 cohpy cohpy 0 May 10 08:18 foo
cohpy at dojo:~/d$
Adding './' to some funky file names can help sometimes.
full transparency
How do you buy a divider bar in checkout line?
rtl sdr europe dvb usb tuner
$10
1 MHz to 3 GHz
spectrum analyzer
vincent visualization interactive html css javascript
https://pypi.python.org/pypi/vincent/0.1.4
WebDAV
1G
Is modulus of negative integers as described in
http://docs.python.org/2/reference/expressions.html#binary-arithmetic-operations
ambiguous, so that implementations can differ?
C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C
cohpy at dojo:~/i/modulo$ cat foo.c
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int x = (-1);
int y = 3;
printf("%d %d %d\n", x/y, x%y, x == (x/y)*y + (x%y));
exit(EXIT_SUCCESS);
}
cohpy at dojo:~/i/modulo$ ./foo
0 -1 1
cohpy at dojo:~/i/modulo$
python python python python python python python python python python python
cohpy at dojo:~/i/modulo$ cat foo.py
#!/usr/bin/env python
x = (-1)
y = 3
print "%d %d %d" % (x/y, x%y, x == (x/y)*y + (x%y))
cohpy at dojo:~/i/modulo$ ./foo.py
-1 2 1
cohpy at dojo:~/i/modulo$
somebody bought copy of New Testament (K&R 2nd Ed)
path.py module is handy but has no documentation, so read the source luke
source env/bin/activate
pip install path.py # not pip install path
from path import path
for f in path('/foo/bar').walkfiles('*.mkv'):
print f.namebase
# Explore many other cool convenience methods (and attributes).
divmod() is cool (but has ambiguity as / and %)
Django on Windows hell
Udacity
local static variables in C
Mutex
The community room worked out well.
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