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How do I grep for all non-ASCII characters?
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Instead of making assumptions about the byte range of non-ASCII characters, as most of the above solutions do, it's slightly better IMO to be explicit about the actual byte range of ASCII characters instead.
So the first solution for instance would become:
grep --colo...
How do I check in JavaScript if a value exists at a certain array index?
...ray if i is between 0 and array.length - 1 inclusive. If i is not in this range it's not in the array.
So by concept, arrays are linear, starting with zero and going to a maximum, without any mechanism for having "gaps" inside that range where no entries exist. To find out if a value exists at a ...
Why does C++ rand() seem to generate only numbers of the same order of magnitude?
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@Floris: but if you scale a small countable range on a very large range, you will have LOTS of holes, which is probably not what OP is expecting.
– André Caron
Jun 25 '13 at 19:12
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How does BLAS get such extreme performance?
...struction per cycle)
Third, your code is far from optimal:
You're using raw pointers, which means that the compiler has to assume they may alias. There are compiler-specific keywords or flags you can specify to tell the compiler that they don't alias. Alternatively, you should use other types tha...
What is q=0.5 in Accept* HTTP headers?
... 1, as can be seen from the HTTP/1.1 Specification, §14.4:
Each language-range MAY be given an associated quality value which represents an estimate of the user's preference for the languages specified by that range. The quality value defaults to "q=1". For example,
Accept-Language: da, en-gb;q=...
What does `unsigned` in MySQL mean and when to use it?
...onnegative numbers in a column
or when you need a larger upper
numeric range for the column. For
example, if an INT column is UNSIGNED,
the size of the column's range is the
same but its endpoints shift from
-2147483648 and 2147483647 up to 0 and 4294967295.
When do I use it ?
Ask yo...
Remove and Replace Printed items [duplicate]
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Just use CR to go to beginning of the line.
import time
for x in range (0,5):
b = "Loading" + "." * x
print (b, end="\r")
time.sleep(1)
share
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improve this answer
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Getting random numbers in Java [duplicate]
...and.nextInt(50);
// Add 1 to the result to get a number from the required range
// (i.e., [1 - 50]).
n += 1;
Another solution is using Math.random():
double random = Math.random() * 49 + 1;
or
int random = (int)(Math.random() * 50 + 1);
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Iterating over a numpy array
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X = np.zeros((100, 100, 100))
%timeit list([((i,j,k), X[i,j,k]) for i in range(X.shape[0]) for j in range(X.shape[1]) for k in range(X.shape[2])])
1 loop, best of 3: 376 ms per loop
%timeit list(np.ndenumerate(X))
1 loop, best of 3: 570 ms per loop
If you are worried about the performance you c...
How to reset index in a pandas dataframe? [duplicate]
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Another solutions are assign RangeIndex or range:
df.index = pd.RangeIndex(len(df.index))
df.index = range(len(df.index))
It is faster:
df = pd.DataFrame({'a':[8,7], 'c':[2,4]}, index=[7,8])
df = pd.concat([df]*10000)
print (df.head())
In [298]: %t...