To get duplicates in a list in Elixir, you can use the Enum.group_by function to group the elements in the list based on their value. Then, you can filter out the groups that have more than one element, which are the duplicates in the list. Finally, you can extract the duplicate elements from each group and combine them into a new list. This way, you can easily identify and retrieve duplicates in a list in Elixir.
How to get unique values from a list in elixir?
One way to get unique values from a list in Elixir is to use the Enum module's uniq/1 function. Here's an example:
1 2 3 |
list = [1, 2, 3, 1, 4, 3, 5, 6] unique_list = Enum.uniq(list) IO.inspect(unique_list) |
This will output [1, 2, 3, 4, 5, 6], which contains only the unique values from the original list.
How to convert a list to a binary in elixir?
To convert a list to binary in Elixir, you can use the :erlang.term_to_binary/1 function, which converts a data structure into a binary representation. Here is an example of how you can convert a list to binary:
1 2 3 |
list = [1, 2, 3, 4] binary = :erlang.term_to_binary(list) |
In this example, the list variable contains a list of integers. We then use the :erlang.term_to_binary/1 function to convert this list into a binary representation, which is stored in the binary variable. You can now use the binary variable in your code as needed.
Keep in mind that this binary representation may not be human-readable, as it is designed for efficient storage and transmission of data between different nodes in an Elixir cluster or across the network.
How to find all occurrences of a duplicate in a list in elixir?
One way to find all occurrences of a duplicate in a list in Elixir is to use the Enum module along with a combination of functions such as Enum.group_by/2 and Map.filter/2.
Here is an example of how you can find all occurrences of a duplicate in a list in Elixir:
1 2 3 4 5 6 7 8 |
list = [1, 2, 3, 4, 2, 5, 3, 6, 3] duplicates = list |> Enum.group_by(& &1) |> Map.filter(fn {_key, values} -> length(values) > 1 end) |> Enum.flat_map(fn {_key, values} -> values end) IO.inspect(duplicates) |
In this code snippet, we first use Enum.group_by(& &1) to group the elements of the list by their values. Then, we use Map.filter/2 to filter out the groups that contain only one element, leaving us with groups that have duplicates. Finally, we use Enum.flat_map/2 to flatten the list of lists into a single list of duplicates.
When you run this code snippet with the example list [1, 2, 3, 4, 2, 5, 3, 6, 3], you will get the output [2, 3, 3], which are the duplicates in the list.
How to find the difference between two lists in elixir?
One way to find the difference between two lists in Elixir is to use the Enum.difference/2 function.
For example, if you have two lists list1 and list2:
1 2 3 4 5 |
list1 = [1, 2, 3, 4, 5] list2 = [1, 3, 5, 7, 9] difference = Enum.difference(list1, list2) IO.inspect(difference) # Output: [2, 4] |
In this example, the Enum.difference/2 function is used to find the elements that are present in list1 but not in list2, resulting in the list [2, 4].
How to find and remove all duplicates in a list in elixir?
You can find and remove all duplicates in a list in Elixir using the following code:
1 2 3 4 5 |
list = [1, 2, 3, 4, 2, 5, 6, 1] unique_list = Enum.uniq(list) IO.inspect(unique_list) |
In this code snippet, the Enum.uniq function is used to remove duplicates from the list. The unique_list variable will contain the list with all duplicates removed.
