lambda-expressions | Exploration of the JSR-335 | Parser library
kandi X-RAY | lambda-expressions Summary
kandi X-RAY | lambda-expressions Summary
#lambda-expressions Exploration of the JSR-335.
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Top functions reviewed by kandi - BETA
- Sort by first name using lambda expression
- Compare two fields
- Gets the first name
- Skips the specified position
- Get next character
- Test if next available
- Compare two person names
- Gets the last name of the person
- Compares this Point with another
- Sort by first name
- Sorts a list of Person by first name
- Sorts byFirst and reference
- Sort by first first name
- Natural sort method
- Sort by last name
- Compares this Person with the first and last name
- Prints the version
- Returns a unique hashCode of the first and lastName
- Sorts the person using a lambda expression
- Sorts a list of person attributes using no method
lambda-expressions Key Features
lambda-expressions Examples and Code Snippets
Lines of Code : 13
License : No License
CopyList names = Arrays.asList("peter", "anna", "mike", "xenia");
Collections.sort(names, new Comparator() {
@Override
public int compare(String a, String b) {
return b.compareTo(a);
}
});
Collections.sort(names, (String a, String Community Discussions
Trending Discussions on lambda-expressions
QUESTION
Hey all I have a issue with trying to use Lambda with my variable simply because its not a Key, value type of setup. Meaning I don't have the typical Dictionary. I have a Dictionary>)-kind of setup.
ANSWER
Answered 2022-Jan-14 at 21:48_data is a tuple of string, List. Ergo, you want to use _data.Value[2] to get access to the List inside of the tuple. The Key represents the "box**" part.
It might be clearer to change the var to the actual type:
QUESTION
I'm learning about lambda-expressions today, and so far, I haven't found their unique use. So I'm asking myself if they are more than just a handy little gadget, taken from functional languages.
What are Lambda-Expressions?
From what I've read, they can be used to instantiate anonymous classes, pass simple methods and filter elements in collections. For example:
...ANSWER
Answered 2021-Nov-29 at 19:12Granted, your example with the boolean expression can be easier written directly. But what if you want to create truth tables for different boolean expressions?
QUESTION
Despite Functions being around in Java since Java 8, I started playing with them only recently. Hence this question may sound a little archaic, kindly excuse.
At the outset, I am talking of a pure function written completely in conformance of Functional Programming definition: deterministic and immutable.
Say, I have a frequent necessity to prepend a string with another static value. Like the following for example:
...ANSWER
Answered 2021-Nov-04 at 10:33I really don't think you, as a user, need to go to such lengths to prove the JVM's guarantees about lambdas. Basically, they are just like any other method to the JVM with no special memory or visibility effects :)
Here's a shorter function definition:
QUESTION
In recent years many elements of 'functional programming' have entered Java, in particular with Java 8. I have in mind lambda-expressions, functional interfaces, Java Generics, the Stream-interface, the Optional-class and similar.
My question is, are there likewise any new classes/interfaces/syntaxes that have been added to Java and stem from the paradigm of 'logic programming'? Or are there maybe plans to do so?
(see e.g. here for a comparison of the two approaches)
...ANSWER
Answered 2021-Aug-09 at 12:39Java supports predicates, functional interfaces that take an argument and return true or false depending on whether the argument makes the conditions of the predicate true or false. This is similar to the Prolog predicates mentioned in the question you linked.
QUESTION
ANSWER
Answered 2021-May-28 at 09:43A way of thinking about this is to realise that the only way to get at a lexically-apparent function value in CL is the special operator function: if you want to get at the function associated with foo in the current lexical environment you have to say (function foo):
QUESTION
In C++, I want to use a map of functions with different type of input or output.
Do to so, I found that using a map with any type could be a way.
But I get several problems. First, I can not use directly the functions in the map.
However, I can use a lambda function to wrap the functions then use these lambda functions in the map.
But, I get a second problem, I still need to cast with the lambda function which is not a variable. This makes a use from a string variable complicated.
Here is a MWE:
...ANSWER
Answered 2021-Apr-04 at 22:29std::any_cast needs to cast to constructible types. A standard C++ function is neither a type nor constructible (it's just a group of statements given a name [edit: this isn't technically true, but what's going on under the hood is fairly complicated]), but std::function is. One way to get around this is to assign a standard C++ function to an std::function. Here's an example using a std::map like you were using:
QUESTION
Next code compiles in CLang/GCC, and successfully inlines lambda:
...ANSWER
Answered 2020-Dec-30 at 15:49Per Jonathan Caves reply on the feature request, the supported syntax going forward is
QUESTION
I am trying to create a method in a base class capable of taking parameters and creating a Predicate on the fly.
Here is the abstract class:
...ANSWER
Answered 2020-Dec-18 at 16:09Is the following not an option?
QUESTION
I am following the Python tutorial.
...ANSWER
Answered 2020-Dec-17 at 00:31In this code, the lambda function "sees" the argument x and the variable n, which is in the lambda's closure:
QUESTION
The college course I am doing requires programming in VB.NET
I am using a VDE and am trying to implement an "Entity" class that has lambda fields. The resource I have been using to try to implement this is: https://docs.microsoft.com/en-us/dotnet/visual-basic/programming-guide/language-features/procedures/lambda-expressions I would like to add that I am new to VB development.
...ANSWER
Answered 2020-Oct-15 at 14:19For that code to compile, you must have Option Strict Off. You should fix that immediately. Your field is being implicitly typed as Object and you can't call an Object reference.
With Option Strict On, you would be forced to specify a type for that field. The obvious type is Action:
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Install lambda-expressions
You can use lambda-expressions like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the lambda-expressions component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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