How to Remove Duplicate From A List In Groovy?

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To remove duplicates from a list in Groovy, you can use the unique() method. This method will return a new list with only the unique elements from the original list. Alternatively, you can also use the toSet() method to convert the list to a set, which automatically removes duplicates, and then convert the set back to a list. Both methods are effective ways to remove duplicates from a list in Groovy.

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How do I remove duplicate entries from a list with varying datatypes in Groovy?

You can remove duplicate entries from a list with varying data types in Groovy by converting the list to a Set, which automatically removes duplicates. Here's an example code snippet to demonstrate this:

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def list = [1, "hello", 2, 3, "hello", "world", 4, 5]
def uniqueList = list as Set

println uniqueList


In this code snippet, the list contains integers and strings. By converting the list to a Set, duplicate entries are automatically removed. The resulting uniqueList will only contain unique elements from the original list.


What is the syntax for removing duplicates from a list in Groovy?

In Groovy, you can remove duplicates from a list by using the unique() method. Here is the syntax:

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def list = [1, 2, 2, 3, 4, 4, 5]
def uniqueList = list.unique()
println uniqueList


In this example, the unique() method is called on the list variable to remove any duplicate elements. The uniqueList variable will then contain the list without any duplicates.


How to remove duplicate items from a list in Groovy without using loops?

One way to remove duplicate items from a list in Groovy without using loops is by converting the list to a Set. Since a Set does not allow duplicate elements, converting a list to a Set will automatically remove any duplicates. Here's an example:

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def list = [1, 2, 3, 2, 4, 5, 1]
def uniqueList = list as Set

println(uniqueList)


This code will output:

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[1, 2, 3, 4, 5]


Another way to remove duplicates is to use the toSet() method, which converts a List to a Set containing all of the unique elements. Here's an example:

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def list = [1, 2, 3, 2, 4, 5, 1]
def uniqueList = list.toSet()

println(uniqueList)


This code will also output:

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[1, 2, 3, 4, 5]


Using a Set is a simple and efficient way to remove duplicates from a list in Groovy without using loops.


How do I remove duplicate values from a list in Groovy while preserving the original order?

You can remove duplicate values from a list in Groovy while preserving the original order by using the unique() method along with the withIndex() method. Here's an example:

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def list = [1, 2, 3, 4, 2, 5, 1, 6, 4, 7]

def uniqueList = list.unique().withIndex().collect { it.value }

println uniqueList // Output: [1, 2, 3, 4, 5, 6, 7]


In this code snippet, we first use the unique() method to remove duplicate values from the list and then use the withIndex() method to maintain the original order of the elements. Finally, we use the collect method to extract the values from the resulting list of tuples and create a new list uniqueList without any duplicate values.

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