Question

How to perform (kind of) function overloading in Node.js

Answer 1

function f() {  
    if (arguments.length == 0) {  
        console.log('No argument');  
    }
 
    else if (arguments.length == 1) {  
        console.log(arguments[0]);  
    }
 
    else {
        let length = arguments.length;
        let s = "";
        for (i = 0; i < length; i++) {  
             s += arguments[i] + ", ";
        }  
        console.log(s)
    }  
}
 
 
f();
f(9); 
f(4, 6);    
f(12, 9, 0, 1, 3, 8, 7); 
 
 

 
/*
run:
 
No argument
9
4, 6, 
12, 9, 0, 1, 3, 8, 7, 
 
*/

 

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Answer 2

function f() {  
    switch (arguments.length) {
        case 0:
            console.log('No argument');  
            break;
        case 1:
            console.log(arguments[0]);  
            break;
        default:
            let length = arguments.length;
            let s = "";
            for (i = 0; i < length; i++) {  
                 s += arguments[i] + ", ";
            }  
            console.log(s);
    }
}
 
 
f();
f(9); 
f(4, 6);    
f(12, 9, 0, 1, 3, 8, 7); 
 
 
 
 
/*
run:
 
No argument
9
4, 6, 
12, 9, 0, 1, 3, 8, 7, 
 
*/

 

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