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Equals(=) vs. LIKE
...h can have important effects on the result of the comparison.
Motivating Em>x m>ample
Let's first identify an em>x m>ample where these operators produce obviously different results. Allow me to quote from the MySQL manual:
Per the SQL standard, LIKE performs matching on a per-character basis, thus it ca...
What is “rvalue reference for *this”?
...of this post. It's way easier to understand it with this wording though.
Nem>x m>t, the following code chooses the function to be called based on the ref-qualifier of the "implicit object parameter" of the function†:
// t.cpp
#include <iostream>
struct test{
void f() &{ std::cout << ...
How do I create a variable number of variables?
...h this. Dictionaries are stores of keys and values.
>>> dct = {'m>x m>': 1, 'y': 2, 'z': 3}
>>> dct
{'y': 2, 'm>x m>': 1, 'z': 3}
>>> dct["y"]
2
You can use variable key names to achieve the effect of variable variables without the security risk.
>>> m>x m> = "spam"
>&gt...
When does invoking a member function on a null instance result in undefined behavior?
...behavior" is mentioned in notes in both §1.9/4 and §8.3.2/4, it's never em>x m>plicitly stated. (Notes are non-normative.)
However, one can try to deduced it from §3.10/2:
An lvalue refers to an object or function.
When dereferencing, the result is an lvalue. A null pointer does not refer to a...
Html helper for
...
HTML Upload File ASP MVC 3.
Model: (Note that FileEm>x m>tensionsAttribute is available in MvcFutures. It will validate file em>x m>tensions client side and server side.)
public class ViewModel
{
[Required, Microsoft.Web.Mvc.FileEm>x m>tensions(Em>x m>tensions = "csv",
ErrorMe...
multiprocessing.Pool: When to use apply, apply_async or map?
I have not seen clear em>x m>amples with use-cases for Pool.apply , Pool.apply_async and Pool.map . I am mainly using Pool.map ; what are the advantages of others?
...
How to correctly iterate through getElementsByClassName
... way to retrieve an item from a NodeList is:
nodeItem = nodeList.item(indem>x m>)
Thus:
var slides = document.getElementsByClassName("slide");
for (var i = 0; i < slides.length; i++) {
Distribute(slides.item(i));
}
I haven't tried this myself (the normal for loop has always worked for me), bu...
Converting DateTime format using razor
...ic DateTime Date { get; set }
and in your view simply:
@Html.DisplayFor(m>x m> => m>x m>.Date)
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How to check if a value em>x m>ists in a dictionary (python)
...s require a global lookup and call, they'll absolutely be slower. Both do em>x m>tra work that's not needed.
– Martijn Pieters♦
Aug 15 '19 at 12:02
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Why does C++ require a user-provided default constructor to default-construct a const object?
...a member M of T has a default member initializer or, if M is of class type m>X m> (or array thereof), m>X m>
is const-default-constructible,
if T is a union with at least one non-static data member, em>x m>actly one variant member has a default member initializer,
if T is not a union, for each anonymous unio...