Xtend is an open source programming language created in 2011 by Sven Efftinge and Sebastian Zarnekow.
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Xtend is a general-purpose high-level programming language for the Java Virtual Machine. Syntactically and semantically Xtend has its roots in the Java programming language but focuses on a more concise syntax and some additional functionality such as type inference, extension methods, and operator overloading. Being primarily an object-oriented language, it also integrates features known from functional programming, e.g. Read more on Wikipedia...
/*******************************************************************************
* Copyright (c) 2012 itemis AG (http://www.itemis.eu) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Author - Sven Efftinge
*******************************************************************************/
package example6
import org.junit.Test
import static org.junit.Assert.*
import java.io.FileReader
import java.util.Set
import static extension com.google.common.io.CharStreams.*
class Movies {
/**
* @return the total number of action movies
*/
@Test def void numberOfActionMovies() {
assertEquals(828, movies.filter[categories.contains('Action')].size)
}
/**
* @return the year the best rated movie of 80ies (1980-1989) was released.
*/
@Test def void yearOfBestMovieFrom80ies() {
assertEquals(1989, movies.filter[(1980..1989).contains(year)].sortBy[rating].last.year)
}
/**
* @return the sum of the number of votes of the two top rated movies.
*/
@Test def void sumOfVotesOfTop2() {
val long movies = movies.sortBy[-rating].take(2).map[numberOfVotes].reduce[a, b| a + b]
assertEquals(47_229, movies)
}
val movies = new FileReader('data.csv').readLines.map[ line |
val segments = line.split(' ').iterator
return new Movie(
segments.next,
Integer::parseInt(segments.next),
Double::parseDouble(segments.next),
Long::parseLong(segments.next),
segments.toSet
)
]
}
@Data class Movie {
String title
int year
double rating
long numberOfVotes
Set<String> categories
}
def sayHello(String name) '''
Hello «name» !
'''| Feature | Supported | Token | Example |
|---|---|---|---|
| Integers | ✓ | ||
| Floats | ✓ | ||
| Hexadecimals | ✓ | ||
| Comments | ✓ | /* A comment */ |
|
| MultiLine Comments | ✓ | /* */ | /* A comment */ |
| Type Inference | ✓ | ||
| Static Typing | ✓ | ||
| Semantic Indentation | X |