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collections.groovy
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collections.groovy
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import groovy.transform.*
@Canonical
class Vampire {String name; int yearBorn; }
ARRAYS: {
Vampire[] vampires = new Vampire[10]; // Vampire array with length 10
String[] names = ["Dracula", "Edward"];
println(vampires)
println(names)
}
LISTS: {
// java way
List<Vampire> vampires = new ArrayList<>();
vampires.add(new Vampire("Count Dracula", 1897));
println(vampires)
//groovy way
def list = []
list.add(new Vampire("Count Dracula", 1897))
// or
list << new Vampire("Count Dracula", 1897)
// or
list += new Vampire("Count Dracula", 1897)
}
SET1: {
Set<String> dragons = new HashSet<>();
dragons.add("Lambton");
dragons.add("Deerhurst");
println dragons.size(); // 2
dragons.remove("Lambton");
println dragons.size(); // 1
println(dragons)
}
SET2: {
SortedSet<String> dragons = new TreeSet<>();
dragons.add("Lambton");
dragons.add("Smaug");
dragons.add("Deerhurst");
dragons.add("Norbert");
System.out.println(dragons);
}
MAPS: {
// [Deerhurst, Lambton, Norbert, Smaug]
Map<String,String> map = new HashMap<>();
map.put("Smaug", "deadly");
map.put("Norbert", "cute");
map.size(); // 2
map.get("Smaug"); // deadly
}