kc3-lang/kc3/doc/1 KC3/1.3 Map.en.md

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• Hash : 6de2d733
  Author : Thomas de Grivel
  Date : 2024-09-08T19:15:55
  

  wip doc

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ikc3> a = %{id: 1, title: "My title", message: "Hello, world !"}
%{id: 1, title: "My title", message: "Hello, world !"}

ikc3> %{id: id, title: "My title", message: message} = ^ a
%{id: 1, title: "My title", message: "Hello, world !"}
ikc3> id
1
ikc3> message
"Hello, world !"

ikc3> a = %{id: 1, title: "My title", message: "Hello, world !"}
%{id: 1, title: "My title", message: "Hello, world !"}
ikc3> a.id
1
ikc3> a.message
"Hello, world !"

ikc3> a = %{id: 1, title: "My title", message: "Hello, world !"}
%{id: 1, title: "My title", message: "Hello, world !"}
ikc3> access(a, :id)
1
ikc3> access(a, :message)
"Hello, world !"

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• doc/1 KC3/1.3 Map.en.md

• # 3 Map
  
  KC3 maps are like Elixir maps, they are key-values enclosed in `%{}` :
  
  ```
  ikc3> a = %{id: 1, title: "My title", message: "Hello, world !"}
  %{id: 1, title: "My title", message: "Hello, world !"}
  ```
  
  Destructuring works with maps to extract values :
  
  ```
  ikc3> %{id: id, title: "My title", message: message} = ^ a
  %{id: 1, title: "My title", message: "Hello, world !"}
  ikc3> id
  1
  ikc3> message
  "Hello, world !"
  ```
  
  
  You can use the dot syntax to access map values from a `Sym` key :
  
  ```
  ikc3> a = %{id: 1, title: "My title", message: "Hello, world !"}
  %{id: 1, title: "My title", message: "Hello, world !"}
  ikc3> a.id
  1
  ikc3> a.message
  "Hello, world !"
  ```
  
  You can also use the `KC3.access` function for the same result :
  
  ```
  ikc3> a = %{id: 1, title: "My title", message: "Hello, world !"}
  %{id: 1, title: "My title", message: "Hello, world !"}
  ikc3> access(a, :id)
  1
  ikc3> access(a, :message)
  "Hello, world !"
  ```
  

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