/TypeScript/Typescript function as parameter

Typescript function as parameter

Typescript pass a function as an argunetn

class Foo {
    save(callback: (n: number) => any) : void {
        callback(42);
    }
}
var foo = new Foo();

var strCallback = (result: string) : void => {
    alert(result);
}
var numCallback = (result: number) : void => {
    alert(result.toString());
}

foo.save(strCallback); // not OK
foo.save(numCallback); // OK

Source: stackoverflow.com

Typescript function as parameter

function createPerson(name: string, doAction: () => void): void {
  console.log(`Hi, my name is ${name}.`);
  doAction(); // doAction as a function parameter.
}

// Hi, my name is Bob.
// performs doAction which is waveHands function.
createPerson('Bob', waveHands());

Typescript annotate return type

function add(x: number, y: number): number {
  return x + y;
}

Similar codes

0 vote117 views1 answer
Sr.No. 18, Plot No. 5/3, CTS No.205,Behind Vandevi Temple, Karvenagar, Pune, Maharashtra
TypeScript
0 vote126 views1 answer
Minimum number of cycle shifts for each string if it can be made palindrome
TypeScript
2 votes112 views1 answer
Powersell execution policy
TypeScript
0 vote132 views1 answer
What will be the result of the cp /etc/hosts . command?
TypeScript
0 vote128 views1 answer
Which Protect Presentation option protects a presentation from accidental changes:
TypeScript
13 votes126 views4 answers
Tsc.ps1 cannot be loaded because running scripts is disabled on this system
TypeScript
1 vote135 views2 answers
Clipping input data to the valid range for imshow with RGB data ([0..1] for floats or [0..255] for integers)
TypeScript
0 vote124 views4 answers
Craeting a method that can take any number of arguments in python
TypeScript
1 vote127 views1 answer
How do i set limits in inputs in python
TypeScript
0 vote137 views1 answer
Can blue jays tickets still be printed
TypeScript