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Pandas read_csv low_memory and dtype options
...or long() with base 10: 'foobar'
dtypes are typically a numpy thing, read more about them here:
http://docs.scipy.org/doc/numpy/reference/generated/numpy.dtype.html
What dtypes exists?
We have access to numpy dtypes: float, int, bool, timedelta64[ns] and datetime64[ns]. Note that the numpy date/tim...
round() for float in C++
...d and generally better if you're going to do a lot of rounding; it's a bit more complex to implement though.
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Why do we use arrays instead of other data structures?
... up time (The look up cost increases as each element is added). It is much more expensive to get to P1000 compared to getting to P4.
Higher level data structures, such as hashtables, stacks and queues, all may use an array (or multiple arrays) internally, while Linked Lists and Binary Trees usually...
One-liner to take some properties from object in ES 6
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(See a runnable example in this other answer).
@EthanBrown's solution is more general. Here is a more idiomatic version of it which uses Object.assign, and computed properties (the [p] part):
function pick(o, ...props) {
return Object.assign({}, ...props.map(prop => ({[prop]: o[prop]})));
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What is the “double tilde” (~~) operator in JavaScript? [duplicate]
...! Better use zero right shift (>>0), it's the fastest one, and looks more similar to signed-to-unsigned conversion (>>>0).
– Triang3l
Dec 21 '12 at 14:20
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Difference between static memory allocation and dynamic memory allocation
... application to crash, since at some point of time, system cannot allocate more memory.
int* func() {
int* mem = malloc(1024);
return mem;
}
int* mem = func(); /* still accessible */
In the upper example, the allocated memory is still valid and accessible, even though the function termin...
Get element inside element by class and ID - JavaScript
... @rvighne the exact requirements of OP was that he "would like to get more specific". The person asking the question was asking how he could be more specific in his DOM tree traversal. The use of getElementByClassName was not a point of confusion, but I can see how someone might easily think ...
LINQ .Any VS .Exists - What's the difference?
...similar to Any.
In short, the methods are essentially the same. One is more general than the other.
Any also has an overload which takes no parameters and simply looks for any item in the enumerable.
Exists has no such overload.
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Determine if variable is defined in Python [duplicate]
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This debate is much more interesting that the answer itself, which by the way is 100% correct and let you handle poor legacy code elegantly.
– e-satis
Mar 31 '10 at 13:46
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