Currency Format задача от Advanced functions Lab

Здравейте, колеги! Дали някой от вас би могъл да сподели решение на задача Currency Format задача от Advanced functions Lab?

Не мога да разбера добре условието и как точно се иска да форматираме задаваните параметри.

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Условие:

Currency Format

Write a higher-order function createFormatter that fixes some of the parameters of another function. Your program will receive four parameters: three values and a function that takes 4 parameters and returns a formatted string (a monetary value with currency symbol).

Your task is to return a partially applied function, based on the input function, that has its first three parameters fixed and only takes one parameter.

You will receive the following function:

currencyFormatter

function currencyFormatter(separator, symbol, symbolFirst, value) {

let result = Math.trunc(value) + separator;

result += value.toFixed(2).substr(-2,2);

if (symbolFirst) return symbol + ' ' + result;

else return result + ' ' + symbol;

}

Receive and set the following parameters to fixed values:

separator

symbol

symbolFirst

The final parameter value is the one that the returned function must receive.

Input

You will receive four parameters:

separator (string)
symbol (string)
symbolFirst (Boolean)
formatter (function)

Output

You need to return a function that takes one parameter - value

Examples

Sample Input

let dollarFormatter = createFormatter(',', '$', true, currencyFormatter);

console.log(dollarFormatter(5345)); // $ 5345,00

console.log(dollarFormatter(3.1429)); // $ 3,14

console.log(dollarFormatter(2.709)); // $ 2,71

function createFormatter(separator, symbol, symbolFirst, currencyFormatter) { let formatter = function(value) { return currencyFormatter(separator, symbol, symbolFirst, value); } return formatter; }