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How to use timeit module
...import random
random.seed('slartibartfast')
s = [random.random() for i in range(1000)]
timsort = list.sort
'''
>>> print min(timeit.Timer('a=s[:]; timsort(a)', setup=setup).repeat(7, 1000))
0.334147930145
Note that the series of statements makes a fresh copy of the unsorted data on ever...
Using python's eval() vs. ast.literal_eval()?
...
datamap = eval(raw_input('Provide some data here: ')) means that you actually evaluate the code before you deem it to be unsafe or not. It evaluates the code as soon as the function is called. See also the dangers of eval.
ast.literal_eval...
How to select rows with one or more nulls from a pandas DataFrame without listing columns explicitly
...es and use that to index into your frame:
>>> df = pd.DataFrame([range(3), [0, np.NaN, 0], [0, 0, np.NaN], range(3), range(3)])
>>> df.isnull()
0 1 2
0 False False False
1 False True False
2 False False True
3 False False False
4 False False False...
Finding out whether a string is numeric or not
... = [[NSCharacterSet decimalDigitCharacterSet] invertedSet];
if ([newString rangeOfCharacterFromSet:notDigits].location == NSNotFound)
{
// newString consists only of the digits 0 through 9
}
See +[NSCharacterSet decimalDigitCharacterSet] and -[NSString rangeOfCharacterFromSet:].
...
Why does the month argument range from 0 to 11 in JavaScript's Date constructor?
...ng but the day of the month is 0 based, see here for a full list including ranges :)
It's actually the 1 based days that are the oddballs here...oddly enough. Why was this was done? I don't know...but probably happened the same meeting they got plastered and decided semicolons were optional.
...
Why all the Active Record hate? [closed]
...it's ugly, but for the cases where you just plain and simply need to write raw SQL, it's easily done.
@Tim Sullivan
...and you select several instances of the model, you're basically doing a "select * from ..."
Code:
people = Person.find(:all, :select=>'name, id')
This will only sel...
Tracing XML request/responses with JAX-WS
Is there an easy way (aka: not using a proxy) to get access to the raw request/response XML for a webservice published with JAX-WS reference implementation (the one included in JDK 1.5 and better) ?
Being able to do that via code is what I need to do.
Just having it logged to a file by clever loggin...
How to optimize for-comprehensions and loops in Scala?
...higher-order methods; in this case, you're calling the foreach method on a Range object. Scala's for is very general, but sometimes leads to painful performance.
You might want to try the -optimize flag in Scala version 2.9. Observed performance may depend on the particular JVM in use, and the JIT ...
Is there a label/goto in Python?
...oto in Python, just like that:
from goto import with_goto
@with_goto
def range(start, stop):
i = start
result = []
label .begin
if i == stop:
goto .end
result.append(i)
i += 1
goto .begin
label .end
return result
I'm not sure why one would like to d...
warning about too many open figures
... as plt, patches
import os
def main():
path = 'figures'
for i in range(21):
_fig, ax = plt.subplots()
x = range(3*i)
y = [n*n for n in x]
ax.add_patch(patches.Rectangle(xy=(i, 1), width=i, height=10))
plt.step(x, y, linewidth=2, where='mid')
...