repeat Character in Node JS

repeatChar.js

/*
    Function:- repeatChar
*/
function repeatChar(ch, count) 
{
    /*
       Declare buffer as an array
    */
    var buffer = [];
    var str = "";
    var i = 0;
    var log = "";
    
    
    const parameterTypeChExpected = "string";
    const parameterTypeCountExpected = "number";

    /*
        Check type of parameter ch
    */  
    if ( typeof(ch) != parameterTypeChExpected)
    {  

        log = "Parameter ch is expected to be of type " + parameterTypeChExpected;

        log = log + ".  " + "Unfortunately ch is of type " + typeof(ch);

        throw new Error(log);
    }    

    /*
        Check type of parameter count
    */  
    if ( typeof(count) != parameterTypeCountExpected)
    {  

        log = "Parameter count is expected to be of type " + parameterTypeCountExpected;

        log = log + ".  " + "Unfortunately count is of type " + typeof(count);

        throw new Error(log);
    }    


    /*
      Start from 0 to count-1
      Incrementing by 1
    */
    for(i=0; i < count;i++)
    { 

        buffer[i] = ch;

    }

    /*
      Join each array element separating by empty string
    */
    str = buffer.join('');

    return (str);

}

/*
    Function:- repeatCharUsingFill
*/
function repeatCharUsingFill(ch, count) 
{
    /*
       Declare buffer as an array
    */
    var buffer = [];
    var i = 0;
    var log = "";
    
    
    const parameterTypeChExpected = "string";
    const parameterTypeCountExpected = "number";

    /*
        Check type of parameter ch
    */  
    if ( typeof(ch) != parameterTypeChExpected)
    {  

        log = "Parameter ch is expected to be of type " + parameterTypeChExpected;

        log = log + ".  " + "Unfortunately ch is of type " + typeof(ch);

        throw new Error(log);
    }    

    /*
        Check type of parameter count
    */  
    if ( typeof(count) != parameterTypeCountExpected)
    {  

        log = "Parameter count is expected to be of type " + parameterTypeCountExpected;

        log = log + ".  " + "Unfortunately count is of type " + typeof(count);

        throw new Error(log);
    }    

    
    /*
        Allocate memory
    */
    buffer = new Array(count);
    
    /*
        Check allocated object
    */
    if ( (buffer === undefined || buffer === null) )
    {
        
        log = "Was not able to allocate memory in repeatCharUsingFill";

        log = log + ".  " + "requested memory of byte size " + count;

        throw new Error(log);
    }        
    
    /*
        Set buffer to char ( ch )
    */    
    buffer.fill(ch);
    
    
    /*
      Join each array element separating by empty string
    */
    str = buffer.join('');

    return (str);    
    

}
/*
    Get the character
*/
const chSeparator = '=';

/*
    Get phrase
*/
phrase = 'Head of the class';

/*
    Get the length of the phrase
*/
len = phrase.length;

/*
    Repeat Character
*/
filler = repeatChar( chSeparator, len);

/*
    Repeat Character Using Fill Method
*/
filler2 = repeatCharUsingFill(chSeparator, len);


/*
    Display Phrase
*/
console.log( phrase );


/*
    Display Filler
*/
console.log ( filler ) ;

console.log ( filler2 ) ;