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How do you check whether a number is divisible by another number (Python)?
I need to test whether each number from 1 to 1000 is a multiple of 3 or a multiple of 5. The way I thought I'd do this would be to divide the number by 3, and if the result is an integer then it would be a multiple of 3. Same with 5.
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Fastest sort of fixed length 6 int array
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23 Answers
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dropping infinite values from dataframes in pandas?
...2]: df.replace([np.inf, -np.inf], np.nan)
Out[12]:
0
0 1
1 2
2 NaN
3 NaN
The same method would work for a Series.
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Most efficient way to prepend a value to an array
...-O but certainly using the unshift method is more concise:
var a = [1, 2, 3, 4];
a.unshift(0);
a; // => [0, 1, 2, 3, 4]
[Edit]
This jsPerf benchmark shows that unshift is decently faster in at least a couple of browsers, regardless of possibly different big-O performance if you are ok with mo...
Transpose/Unzip Function (inverse of zip)?
... use the special * operator.
>>> zip(*[('a', 1), ('b', 2), ('c', 3), ('d', 4)])
[('a', 'b', 'c', 'd'), (1, 2, 3, 4)]
The way this works is by calling zip with the arguments:
zip(('a', 1), ('b', 2), ('c', 3), ('d', 4))
… except the arguments are passed to zip directly (after being co...
Is it possible to use 'else' in a list comprehension? [duplicate]
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The syntax a if b else c is a ternary operator in Python that evaluates to a if the condition ...
In an array of objects, fastest way to find the index of an object whose attributes match a search
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Maybe you would like to use higher-order functions such as "map".
Assuming you want search by ...
What is the difference between '/' and '//' when used for division?
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What is the easiest way to push an element to the beginning of the array?
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What about using the unshift method?
ary.unshift(obj, ...) → ary
Prepends objects to t...
Is there a better way of writing v = (v == 0 ? 1 : 0); [closed]
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31 Answers
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