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How to Sort Groovy List Correctly?

2 minutes read

To sort a Groovy list correctly, you can use the sort() method on the list and pass in a closure that defines the sorting logic. The closure should return a negative number if the first element should come before the second, a positive number if the first element should come after the second, and zero if they are equal. You can also use the sort() method with a comparator to define custom sorting logic. Additionally, you can use the sort() method with a boolean parameter to specify whether the sorting should be in ascending or descending order.


What is the significance of the comparison property when sorting custom objects in groovy?

The comparison property is important when sorting custom objects in Groovy because it defines how the objects are compared to determine their order in the sorted collection. When sorting custom objects, Groovy needs to know how to compare two objects to decide their order in the sorted list.


By implementing the comparison property, the custom object defines the criteria by which the objects will be sorted. This allows Groovy to order the objects based on the specified comparison logic. The comparison property is typically implemented by overriding the compareTo method in the custom object class.


Overall, the comparison property is significant because it determines the sorting behavior of custom objects in Groovy and allows developers to define the sorting logic for their specific objects.


How to sort a groovy list of booleans?

To sort a Groovy list of booleans, you can use the sort method along with a custom comparator that compares boolean values as integers. Here's an example:

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def booleanList = [true, false, true, false, true]

booleanList.sort { a, b -> a.compareTo(b) }

println booleanList


This code snippet will output [false, false, true, true, true], as the sort method will use the compareTo method to compare the boolean values as integers (false=0, true=1) and sort the list accordingly.


What is the default sorting order in groovy?

The default sorting order in Groovy is in ascending order.

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