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Groovy - Lists
Groovy - Lists
The List is a structure used to store a collection of data items. In Groovy, the List holds a sequence of object references. Object references in a List occupy a position in the sequence and are distinguished by an integer index. A List pteral is presented as a series of objects separated by commas and enclosed in square brackets.
To process the data in a pst, we must be able to access inspanidual elements. Groovy Lists are indexed using the indexing operator []. List indices start at zero, which refers to the first element.
Following are some example of psts −
[11, 12, 13, 14] – A pst of integer values
[‘Angular’, ‘Groovy’, ‘Java’] – A pst of Strings
[1, 2, [3, 4], 5] – A nested pst
[‘Groovy’, 21, 2.11] – A heterogeneous pst of object references
[ ] – An empty pst
In this chapter, we will discuss the pst methods available in Groovy.
| Sr.No. | Methods & Description |
|---|---|
| 1 |
Append the new value to the end of this List. |
| 2 |
Returns true if this List contains the specified value. |
| 3 |
Returns the element at the specified position in this List. |
| 4 |
Returns true if this List contains no elements |
| 5 |
Creates a new List composed of the elements of the original without those specified in the collection. |
| 6 |
Creates a new List composed of the elements of the original together with those specified in the collection. |
| 7 |
Removes the last item from this List |
| 8 |
Removes the element at the specified position in this List. |
| 9 |
Create a new List that is the reverse the elements of the original List |
| 10 |
Obtains the number of elements in this List. |
| 11 |
Returns a sorted copy of the original List. |