curry_ex6.js

const curry = (func) => {
    const arity = func.length; // number of arguments
  
    return build = (...args) => {
        if(args.length >= arity) { // (1)
            return func(...args); // (3)
        }
        else {
            return build.bind(null, ...args); // (2)
        }
    }
}

const logger = (type, lineNumber, message) => {
    console.log(`${type} : ${message} at line ${lineNumber}`);
}

const customLogger = curry(logger);

/* 
    Create partials with fixed first argument
*/

const errorLogger = customLogger('ERROR');
const warningLogger = customLogger('WARNING');

/* 
    Use them like this with fixed first argument.
*/

errorLogger(35, 'Some error message'); // ERROR : Some error message at line 35
warningLogger(24, 'Some warning message'); // WARNING : Some warning message at line 24