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How can I convert comma separated string into a List
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@LiquidPony in this implementation yes as the Select em>x m>tension in this case returns IEnumerable<Int32> and it is not list. However list has a constructor accepting another collection as source.
– Oybek
Feb 15 '12 at 21:07
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Em>x m>tracting bits with a single multiplication
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Very interesting question, and clever trick.
Let's look at a simple em>x m>ample of getting a single byte manipulated. Using unsigned 8 bit for simplicity. Imagine your number is m>x m>m>x m>am>x m>m>x m>bm>x m>m>x m> and you want ab000000.
The solution consisted of two steps: a bit masking, followed by multiplication. The bit...
Python list subtraction operation
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Use a list comprehension:
[item for item in m>x m> if item not in y]
If you want to use the - infim>x m> syntam>x m>, you can just do:
class MyList(list):
def __init__(self, *args):
super(MyList, self).__init__(args)
def __sub__(self, other):
return self._...
Python, compute list difference
...ase on lists with ~6000 strings each showed that this method was almost 100m>x m> faster than list comprehensions.
– perrygeo
Feb 1 '14 at 17:01
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How to initialize a two-dimensional array in Python?
...up in Python was
bar = []
for item in some_iterable:
bar.append(SOME Em>X m>PRESSION)
which helped motivate the introduction of list comprehensions, which convert that snippet to
bar = [SOME Em>X m>PRESSION for item in some_iterable]
which is shorter and sometimes clearer. Usually you get in the hab...
Rolling or sliding window iterator?
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There's one in an old version of the Python docs with itertools em>x m>amples:
from itertools import islice
def window(seq, n=2):
"Returns a sliding window (of width n) over data from the iterable"
" s -> (s0,s1,...s[n-1]), (s1,s2,...,sn), ... "
it = iter(se...
Python - How to sort a list of lists by the fourth element in each list? [duplicate]
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unsorted_list.sort(key=lambda m>x m>: m>x m>[3])
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CROSS JOIN vs INNER JOIN in SQL
...ults, Innerjoin will only return 100 rows in the same situation.
These 2 em>x m>amples will return the same result:
Cross join
select * from table1 cross join table2 where table1.id = table2.fk_id
Inner join
select * from table1 join table2 on table1.id = table2.fk_id
Use the last method
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What are the rules for the “…” token in the contem>x m>t of variadic templates?
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In the contem>x m>t of variadic template, the ellipsis ... is used to unpack the template parameter pack if it appears on the right side of an em>x m>pression (call this em>x m>pression pattern for a moment), or it's a pack argument if it appears on le...
Unresolved em>x m>ternal symbol on static class members
...e C++ standard, you must add the definitions to match your declarations of m>X m> and Y
unsigned char test::m>X m>;
unsigned char test::Y;
somewhere. You might want to also initialize a static member
unsigned char test::m>X m> = 4;
and again, you do that in the definition (usually in a Cm>X m>m>X m> file) not in the decl...