CODEWITHSUNDEEP
groovy
BevynQ
BevynQ

Reputation: 8269

Initialising Array is clumsy

I currently have the code

static  Collection<Object[]> defineObjects() {
    def myObjects = new Object[2][4]

    myObjects[0] = [object11,object12,object13,object14]
    myObjects[1] = [object21,object22,object23,object24]

    return myObjects;
}

It is annoying that I have to define the size of the array rather than just initialise it.

Is there a more elegant way to code this function?

Upvotes: 1

Views: 48

Answers (1)

Szymon Stepniak
Szymon Stepniak

Reputation: 42234

You don't have to define size of an array. Consider following two examples:

import groovy.transform.CompileStatic
import groovy.transform.TypeChecked

@CompileStatic
@TypeChecked
class Objects {

  static void main(String[] args) {
    println defineObjects()
    println defineObjects2()
  }

  static Collection<Object[]> defineObjects() {
    def myObjects = [
      [new Object(), new Object(), new Object()] as Object[],
      [new Object(), new Object(), new Object()] as Object[]
    ]
    return myObjects
  }

  static Object[][] defineObjects2() {
    def myObjects = [
      [new Object(), new Object(), new Object()] as Object[],
      [new Object(), new Object(), new Object()] as Object[]
    ] as Object[][]
    return myObjects
  }
}

In case of using Collection<Object[]> you can simply add lists and cast them to Object[]. In case of two dimensional array you do the same + you cast final list to Object[][].

Output

[[java.lang.Object@4667ae56, java.lang.Object@77cd7a0, java.lang.Object@204f30ec], [java.lang.Object@e25b2fe, java.lang.Object@754ba872, java.lang.Object@146ba0ac]]
[[java.lang.Object@4dfa3a9d, java.lang.Object@6eebc39e, java.lang.Object@464bee09], [java.lang.Object@f6c48ac, java.lang.Object@13deb50e, java.lang.Object@239963d8]]

Upvotes: 1

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