typescript typing discipline code example

Example 1: contextual typing in typescript

Lets say you defined a call signature for any function.

type greet = (name: string) => void 

Now, when you declare any function having this type, like this

const sayHello: greet = (name) =>{
  console.log("hello ", name);
}

you dont need to explicitly annotate funciton paramters and return type,
  this is called "CONTEXTUAL TYPING".

Example 2: typing in typescript

var name: string = "Anna";
let notes: (number | string)[] = ["Get Food", 23, "Call the previous number when betting"];

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