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C++ unordered_map using a custom class type as the key
...rloading operator==() for your key type (as you did already).
The difficulty with the hash function is that if your key type consists of several members, you will usually have the hash function calculate hash values for the individual members, and then somehow combine them into one hash value for ...
How to overload std::swap()
...X& a, X& b)
{
using std::swap; // bring in swap for built-in types
swap(a.base1, b.base1);
swap(a.base2, b.base2);
// ...
swap(a.member1, b.member1);
swap(a.member2, b.member2);
// ...
}
};
...
Thymeleaf: how to use conditionals to dynamically add/remove a CSS class
...
There is also th:classappend.
<a href="" class="baseclass" th:classappend="${isAdmin} ? adminclass : userclass"></a>
If isAdmin is true, then this will result in:
<a href="" class="baseclass adminclass"></a>
...
Missing Maven dependencies in Eclipse project
...t of your eclipse's project.
2) Insert the following entry to the file:
<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
<attributes>
<attribute name="maven.pomderived" value="true"/>
<attribute name="org.eclipse.jst...
How do I join two lines in vi?
...th 'gJ' you join lines as is -- without adding or removing whitespaces:
S<Switch_ID>_F<File type>
_ID<ID number>_T<date+time>_O<Original File name>.DAT
Result:
S<Switch_ID>_F<File type>_ID<ID number>_T<date+time>_O<Original File name>.D...
Java “lambda expressions not supported at this language level”
...or every module, File Menu → Project Structure → Modules, but by default it will the same as Project language level.
– user1516873
May 14 '15 at 16:18
6
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Mapping two integers to one, in a unique and deterministic way
... : Z -> N, like so:
f(n) = n * 2 if n >= 0
f(n) = -n * 2 - 1 if n < 0
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C# equivalent of the IsNull() function in SQL Server
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public static T isNull<T>(this T v1, T defaultValue)
{
return v1 == null ? defaultValue : v1;
}
myValue.isNull(new MyValue())
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How to access component methods from “outside” in ReactJS?
...od()); // Prints 'bar'
}
render() {
return (
<div>
<Child ref={this._child} />
</div>
);
}
}
Note: This will only work if the child component is declared as a class, as per documentation found here: https://face...
Returning IEnumerable vs. IQueryable
What is the difference between returning IQueryable<T> vs. IEnumerable<T> , when should one be preferred over the other?
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