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Getting number of elements in an iterator in Python
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No. It's not possible.
Example:
import random
def gen(n):
for i in xrange(n):
if random.randint(0, 1) == 0:
yield i
iterator = gen(10)
Length of iterator is unknown until you iterate through it.
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How to convert from System.Enum to base integer?
... inheritance relationship with Int32 (though both are ValueTypes), so the explicit cast cannot be correct within the type system
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How to handle exceptions in a list comprehensions?
... some a list comprehension in Python in which each iteration can throw an exception.
6 Answers
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Reset push notification settings for app
... Has anyone tried this w/ iOS 5.1? I have followed these steps exactly and I still can't get the device to reset it... I have even tried setting the clock on my Mac forward before installing it via Xcode.
– nrj
Mar 21 '12 at 19:21
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Using port number in Windows host file
...e hosts file is for host name resolution only (on Windows as well as on Unix-like systems). You cannot put port numbers in there, and there is no way to do what you want with generic OS-level configuration - the browser is what selects the port to choose.
So use bookmarks or something like that.
(S...
What is difference between monolithic and micro kernel?
Could anyone please explain with examples difference between monolithic and micro kernel? Also other classifications of the kernel?
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Fixing the order of facets in ggplot
...vels=unique(.)))) %>% # convert to factor
ggplot() +
geom_bar(aes(x = type, y=amount, fill=type),
position="dodge", stat="identity") +
facet_grid(~ size)
You can apply this solution to arrange the bars within facets, too, though you can only choose a single, preferred order...
Checking if a list is empty with LINQ
...gt; source)
{
if (source == null)
return true; // or throw an exception
return !source.Any();
}
Edit: Note that simply using the .Count method will be fast if the underlying source actually has a fast Count property. A valid optimization above would be to detect a few base types an...
How can I get query string values in JavaScript?
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