How to Convert Map Entries Into List Of Pair In Elixir?

In Elixir, you can convert map entries into a list of pairs using the Map.to_list/1 function. This function takes a map as an argument and returns a list of key-value pairs. Each pair is represented as a tuple where the first element is the key and the second element is the corresponding value. This allows you to iterate over the map entries using functions like Enum.each/2 or Enum.map/2. By converting map entries into a list of pairs, you can easily manipulate or process the data in a more structured format.

What is the function to use to convert map entries into a list of pairs in Elixir?

The function to use to convert map entries into a list of pairs in Elixir is Map.to_list/1.

For example:

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map = %{a: 1, b: 2, c: 3}
pairs = Map.to_list(map)
IO.inspect(pairs)

This will output:

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[a: 1, b: 2, c: 3]

How do you convert a map to a list of key-value pairs in Elixir?

In Elixir, you can convert a map to a list of key-value pairs using the Map.to_list/1 function. Here's an example:

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map = %{a: 1, b: 2, c: 3}
list = Map.to_list(map)

After running the above code, the list variable will contain a list of tuples representing the key-value pairs of the map:

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[a: 1, b: 2, c: 3]

Each tuple in the list will have the key as the first element and the corresponding value as the second element.

What is the most concise method for converting map entries to pairs in Elixir?

The most concise method for converting map entries to pairs in Elixir is to use the Enum.to_list/1 function along with pattern matching. You can simply pass the map to Enum.to_list/1 to convert it to a list of key-value tuples. Here is an example:

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map = %{a: 1, b: 2, c: 3}

pairs = Enum.to_list(map)

IO.inspect(pairs)

This will output:

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[a: 1, b: 2, c: 3]

How to extract key-value pairs from a map in Elixir?

In Elixir, to extract key-value pairs from a map, you can use the Map module's functions like Enum.map/2 or Enum.reduce/3. Here's an example using Enum.map/2:

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map = %{name: "Alice", age: 30, city: "New York"}

key_value_pairs = map
|> Enum.map(fn {k, v} -> {k, v} end)

IO.inspect(key_value_pairs) #=> [name: "Alice", age: 30, city: "New York"]

In this example, we first define a map map. Then, we use Enum.map/2 to iterate over the map and extract key-value pairs into a list of tuples. Finally, we print the extracted key-value pairs.

You can modify the mapping function inside Enum.map/2 to format the extracted key-value pairs as needed.