How do I sort in descending order in Groovy?

How do I sort in descending order in Groovy?

Groovy – reverse()

1. Syntax. List reverse()
2. Parameters. None.
3. Return Value. The reversed list.
4. Example. Following is an example of the usage of this method − class Example { static void main(String[] args) { def lst = [11, 12, 13, 14]; def revlst = lst. reverse(); println(revlst); } }

How do you sort a set in descending order?

To sort TreeSet in descending order, use the descendingSet() method in Java. The descendingSet() method is used to return a reverse order view of the elements contained in this set.

How do you sort a list in Grails?

Description

1. By default results are sorted by creation date, and you can specify the column to order by in a query: def results = Book.list(sort:”title”)
2. However, you can also configure the default sort property: static mapping = { sort “title” }
3. in which case the sort argument is no longer needed.

How do you sort a string list in reverse order?

sort() method. This method requires two parameters i.e. the list to be sorted and the Collections. reverseOrder() that reverses the order of an element collection using a Comparator. The ClassCastException is thrown by the Collections.

How do I create an array in groovy?

An Array is an object that contains elements of similar data type. Groovy reuses the list notation for arrays, but to make such literals arrays, you need to explicitly define the type of the array through coercion or type declaration. You can also create multi-dimensional arrays.

How do you create a tree that stores values in descending order?

To improve upon that, we will simulate the reverse in-order traversal of a binary tree as follows:

1. Create a dummy node.
2. Create a variable called ‘prev’ and make it point to the dummy node.
3. Perform reverse in-order traversal and at each step. Set prev -> right = curr. Set prev -> left = NULL. Set prev = curr.

How do I sort a list in Groovy?

Groovy – sort()

1. Syntax. List sort()
2. Parameters. None.
3. Return Value. The sorted list.
4. Example. Following is an example of the usage of this method − class Example { static void main(String[] args) { def lst = [13, 12, 15, 14]; def newlst = lst. sort(); println(newlst); } }

How do I sort a map in groovy?

Maps don’t have an order for the elements, but we may want to sort the entries in the map. Since Groovy 1.7. 2 we can use the sort() method which uses the natural ordering of the keys to sort the entries. Or we can pass a Comparator to the sort() method to define our own sorting algorithm for the keys.

How do you sort an array in reverse order?

The only way to sort a primitive array in descending order is, first sort the array in ascending order and then reverse the array in place. This is also true for two-dimensional primitive arrays. Convert your primitives to their respective objects. Integer for int, Double for double, Boolean for boolean, etc.