error TS2554: Expected 0-1 arguments, but got 2

Issue

I don't get why the compiler five me such an error message.
I am trying to insert a lambda as an argument to a function and thereby get an error. Thanks in advance to all the helpers!

const allOperationSymbols = ['+', '-', '/', '*', '^'] as const;
export type OperationSymbol = typeof allOperationSymbols[number];

type OperationMap = Map<OperationSymbol, (Left: Value, Right: Value) => Value>;

export class Type {

    private definedOperations: Set<OperationMap>;

     public appendOperation(operationMap: OperationMap) {
        this.definedOperations.add(operationMap);
    }
}

class Types {
    private value: Array<Type> = [];

    public appendType(type: Type) {
        this.value.push(type);
    }

    public addInteger() {
        let Integer: Type;
        Integer = new Type('Integer', new Set());

        const operationMap = new Map('+', /*here is the error*/ (Left: Value, Right: Value): Value => {
        const LeftNumber = Number(Left);
        const RightNumber = Number(Right);
        const areIntegers = Number.isInteger(LeftNumber) && Number.isInteger(RightNumber);
        if (LeftNumber != NaN && RightNumber != NaN && areIntegers) {
            return new Value((Number(Left) + Number(Right)).toString(), Integer);
        }
    });

    Integer.appendOperation(operationMap);

    this.appendType(Integer);
    }
}

Solution

Expected 0-1 arguments, but got 2

You are using the Map constructor wrong (and TypeScript is pointing it out).

Your usage:

new Map('+', function);

The Map constructor in JavaScript takes nothing (0 arguments) or an array (1 argument) of key,value tuples. e.g. correct usage (1 argument version):

 new Map([
   ['+', function]
 ]);

More

See : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/Map

Answered By - basarat