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How to find the statistical mode?
...erate & find the mode of a 10M-integer vector in about half a second.
If your data set might have multiple modes, the above solution takes the same approach as which.max, and returns the first-appearing value of the set of modes. To return all modes, use this variant (from @digEmAll in the com...
Twig ternary operator, Shorthand if-then-else
Does Twig support ternary (shorthand if-else) operator?
3 Answers
3
...
Check for array not empty: any?
Is it bad to check if an array is not empty by using any? method?
6 Answers
6
...
Adding information to an exception?
... %s' % arg1)
IOError: Stuff happens at arg1
Update 1
Here's a slight modification that preserves the original traceback:
...
def bar(arg1):
try:
foo()
except Exception as e:
import sys
raise type(e), type(e)(e.message +
' happens at ...
Python logging: use milliseconds in time format
...e(self, record, datefmt=None):
ct = self.converter(record.created)
if datefmt:
s = time.strftime(datefmt, ct)
else:
t = time.strftime("%Y-%m-%d %H:%M:%S", ct)
s = "%s,%03d" % (t, record.msecs)
return s
Notice the comma in "%s,%03d". This can not be fixed by ...
Listing all permutations of a string/integer
...ents, concatenated with every permutation of the other elements.
Example:
If the set just has one element -->
return it.
perm(a) -> a
If the set has two characters: for
each element in it: return the
element, with the permutation of the
rest of the elements added, like so:
perm(ab) ->
...
When to use ko.utils.unwrapObservable?
...apObservable(item) Looking at the code, that call basically checks to see if item is an observable. If it is, return the value(), if it's not, just return the value. Looking at the section on Knockout about creating custom bindings, they have the following syntax:
...
How to efficiently compare two unordered lists (not sets) in Python?
...be considered equal, because they have exactly the same elements, only in different order.
10 Answers
...
What are deferred objects?
...nd new feature. I have no idea how they work, and I think it would be good if StackOverflow had this question well explained for those who will ask about it in the future.
– user113716
Feb 1 '11 at 19:13
...
How to check if std::map contains a key without doing insert?
....second for false , but the problem is that this still inserts something if the key is unused, whereas what I want is a map.contains(key); function.
...