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Extension methods cannot be dynamically dispatched
...ot supported.
Cast the dynamic types to actual types, and it will work.
From what I see now, I'd say:
(string) ViewBag.MagNo
Which would result in
@foreach (var item in Model)
{
@Html.DropDownListFor(modelItem => item.TitleIds,
new SelectList(ViewBag.TitleNames as System.Collec...
How to Pass Parameters to Activator.CreateInstance()
...orth it or not.
Details about the issue on this article.
Graph is taken from the article and represents time taken in ms per 1000 calls.
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jQuery map vs. each
...ewItems is [2,3,4,5]
You can also use the map function to remove an item from an array. For example:
var items = [0,1,2,3,4,5,6,7,8,9];
var itemsLessThanEqualFive = $.map(items, function(i) {
// removes all items > 5
if (i > 5)
return null;
return i;
});
// itemsLessThanEqualFi...
Does pandas iterrows have performance issues?
I have noticed very poor performance when using iterrows from pandas.
6 Answers
6
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How to change the cursor into a hand when a user hovers over a list item?
...@EdwardBlack cursor: hand is deprecated and not in the css spec. it's like from ie5-6 era. use only pointer.
– northamerican
May 5 '16 at 20:39
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...
mailto link multiple body lines
...no trailing "%0D%0A" in the body [...]
See also in section 6 the example from the same RFC:
<mailto:infobot@example.com?body=send%20current-issue%0D%0Asend%20index>
The above mailto body corresponds to:
send current-issue
send index
...
Guid.NewGuid() vs. new Guid()
...the former, because that's the point of a UUID (unless you're receiving it from somewhere else of course).
There are cases where you do indeed want an all-zero UUID, but in this case Guid.Empty or default(Guid) is clearer about your intent, and there's less chance of someone reading it expecting a ...
Understanding Python's “is” operator
...ariables point the same object, not if two variables have the same value.
From the documentation for the is operator:
The operators is and is not test for object identity: x is y is true if and only if x and y are the same object.
Use the == operator instead:
print(x == y)
This prints True...
Combine two columns of text in pandas dataframe
...ew timings using Pandas 0.19.0
Timing without CPU/GPU optimization (sorted from fastest to slowest):
In [107]: %timeit df['Year'].astype(str) + df['quarter']
10 loops, best of 3: 131 ms per loop
In [106]: %timeit df['Year'].map(str) + df['quarter']
10 loops, best of 3: 161 ms per loop
In [108]: %t...
Obtaining a powerset of a set in Java
...> s:pset)
{
System.out.println(s);
}
It's from my Project Euler Library... :)
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