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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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Sleep for milliseconds
...you will have to settle for usleep, which accepts microseconds:
#include <unistd.h>
unsigned int microseconds;
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usleep(microseconds);
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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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How to convert a number to string and vice versa in C++
...s of the C++11 standard, string-to-number conversion and vice-versa are built in into the standard library. All the following functions are present in <string> (as per paragraph 21.5).
string to numeric
float stof(const string& str, size_t *idx = 0);
double stod(...
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...
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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HTTP vs HTTPS performance
...e page (perhaps in a hidden HTML element) and then showing it using client-script.
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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...
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>() ...
Delegates: Predicate vs. Action vs. Func
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Predicate: essentially Func<T, bool>; asks the question "does the specified argument satisfy the condition represented by the delegate?" Used in things like List.FindAll.
Action: Perform an action given the arguments. Very general purpose. Not use...