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Access Enum value using EL with JSTL
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A simple comparison against string works:
<c:when test="${someModel.status == 'OLD'}">
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Angular.js ng-repeat across multiple tr's
...ckout.js when iterating over an array of these rows, because I could use <!-- ko:foreach --> around both tr elements.
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Create a list from two object lists with linq
...rer in the Union extension method like in my example, it will use the default Equals and GetHashCode methods in your Person class. If you for example want to compare persons by comparing their Name property, you must override these methods to perform the comparison yourself. Check the following code...
Efficiency of Java “Double Brace Initialization”?
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Just for reference, double brace initialization is the following:
List<String> list = new ArrayList<String>() {{
add("Hello");
add("World!");
}};
It looks like a "hidden" feature of Java, but it is just a rewrite of:
List<String> list = new ArrayList<String>() ...
Null or default comparison of generic argument in C#
...ng, the best way to compare generics for equality is with EqualityComparer<T>.Default. This respects IEquatable<T> (without boxing) as well as object.Equals, and handles all the Nullable<T> "lifted" nuances. Hence:
if(EqualityComparer<T>.Default.Equals(obj, default(T))) {
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Function passed as template argument
...ors as well, the usual solution is something like this instead:
template <typename F>
void doOperation(F f)
{
int temp=0;
f(temp);
std::cout << "Result is " << temp << std::endl;
}
which can now be called as either:
doOperation(add2);
doOperation(add3());
See it l...
Should switch statements always contain a default clause?
...ecial behavior.
You see this a LOT in menu-driven programs and bash shell scripts. You might also see this when a variable is declared outside the switch-case but not initialized, and each case initializes it to something different. Here the default needs to initialize it too so that down the line ...
How to declare an ArrayList with values? [duplicate]
...create a new object using the constructor that accepts a Collection:
List<String> x = new ArrayList<>(Arrays.asList("xyz", "abc"));
Tip: The docs contains very useful information that usually contains the answer you're looking for. For example, here are the constructors of the Array...
Dictionary returning a default value if the key does not exist [duplicate]
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TryGetValue will already assign the default value for the type to the dictionary, so you can just use:
dictionary.TryGetValue(key, out value);
and just ignore the return value. However, that really will just return default(TValue), not some custom default value (...
How to change the ROOT application?
I'm trying to change the default application of a Tomcat 6 webserver to a different application than "ROOT" (inside webapps folder). What is the best way to do this?
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