Javascript - array question - Basic

Hi

Basic question but just can't get my head round it.

This javascript program details the maximum no of visitors. But there are two months with the same ammount of visitors. How can I get it to output both the months and the number of visitors?


var maximumVisitors; 
var visitorsArray = [88,62,200,100,200,34,123,34,76,199,145,11] ;
var monthNamesArray = ['January','February','March','April','May','June','July','August','September','October','November','December']; 

maximumVisitors = 0;

for (var month = 1; month < visitorsArray.length; month = month + 1) 
{
    if (visitorsArray[month] > visitorsArray[maximumVisitors]) 
    {
        maximumVisitors = month;
    }
}
document.write('Maximum Monthly Visitors of  ' 
                + visitorsArray[maximumVisitors] + ' was in ' 
                + monthNamesArray[maximumVisitors]);

Open in new window

buzzy333Asked:
Who is Participating?

Improve company productivity with a Business Account.Sign Up

x
 
Göran AnderssonConnect With a Mentor Commented:
First find the highest value, the get all months that have that value:
var visitorsArray = [88,62,200,100,200,34,123,34,76,199,145,11];
var monthNamesArray = ['January','February','March','April','May','June','July','August','September','October','November','December']; 

var max = 0;
for (var i = 1; i < visitorsArray.length; i++) {
  max = Math.max(max, visitorsArray[i]);
}

var months = [];
for (var i = 1; i < visitorsArray.length; i++) {
  if (visitorsArray[i] == max) months.push(monthNamesArray[i]);
}

document.write('Maximum Monthly Visitors of  ' 
                + max + ' was in ' 
                + months.join(', ');

Open in new window

0
 
Gurvinder Pal SinghCommented:
make it

var maximumVisitors = new Array();
var visitorsArray = [88,62,200,100,200,34,123,34,76,199,145,11] ;
var monthNamesArray = ['January','February','March','April','May','June','July','August','September','October','November','December'];

maximumVisitors = 0;

for (var month = 1; month < visitorsArray.length; month = month + 1)
{
    if (visitorsArray[month] > visitorsArray[maximumVisitors])
    {
        maximumVisitors[maximumVisitors.length] = month;
    }
}
for ( var counter = 0; counter < maximumVisitors.length; counter++)
document.write('Maximum Monthly Visitors of  '
                + visitorsArray[maximumVisitors] + ' was in '
                + monthNamesArray[maximumVisitors]);
0
 
sjklein42Commented:
First time through the loop, keep track of the NUMBER of maximum visitors, not the month.

Second time through the loop, print any month that actually had that number.

var maximumVisitors; 
var visitorsArray = [88,62,200,100,200,34,123,34,76,199,145,11] ;
var monthNamesArray = ['January','February','March','April','May','June','July','August','September','October','November','December']; 

maximumVisitors = 0;

for (var month = 1; month < visitorsArray.length; month = month + 1) 
{
    if (visitorsArray[month] > maximumVisitors) 
    {
        maximumVisitors = visitorsArray[month];
    }
}

for (var month = 1; month < visitorsArray.length; month = month + 1) 
{
    if (visitorsArray[month] == maximumVisitors)
    {
        document.write('Maximum Monthly Visitors of  ' 
                + visitorsArray[month] + ' was in ' 
                + monthNamesArray[month]);
    }
}

Open in new window

0
Get 10% Off Your First Squarespace Website

Ready to showcase your work, publish content or promote your business online? With Squarespace’s award-winning templates and 24/7 customer service, getting started is simple. Head to Squarespace.com and use offer code ‘EXPERTS’ to get 10% off your first purchase.

 
buzzy333Author Commented:
Thanks for your help

sjklein42 output produced 'Maximum Monthly Visitors of 200 was in MarchMaximum Monthly Visitors of 200 was in May'

How would I get it it to produce the output as follows: ' Maximum monthly Visitors of 200 was in March & May'

Thanks in advance  
0
 
sjklein42Commented:
This should do it:

var maximumVisitors; 
var visitorsArray = [88,62,200,100,200,34,123,34,76,199,145,11] ;
var monthNamesArray = ['January','February','March','April','May','June','July','August','September','October','November','December']; 

maximumVisitors = 0;

for (var month = 1; month < visitorsArray.length; month = month + 1) 
{
    if (visitorsArray[month] > maximumVisitors) 
    {
        maximumVisitors = visitorsArray[month];
    }
}

var count = 0;
for (var month = 1; month < visitorsArray.length; month = month + 1) 
{
    if (visitorsArray[month] == maximumVisitors)
    {
	if ( ! (count++) )
	{
	        document.write('Maximum Monthly Visitors of  ' 
		        + visitorsArray[month] + ' was in ' 
			+ monthNamesArray[month]);
	}
	else
	{
	        document.write(' & ' + monthNamesArray[month]);
	}
    }
}

Open in new window

0
 
Göran AnderssonCommented:
That change was easily made in the code that I suggested. Simply change the string ", " into " & ":
var visitorsArray = [88,62,200,100,200,34,123,34,76,199,145,11];
var monthNamesArray = ['January','February','March','April','May','June','July','August','September','October','November','December']; 

var max = 0;
for (var i = 1; i < visitorsArray.length; i++) {
  max = Math.max(max, visitorsArray[i]);
}

var months = [];
for (var i = 1; i < visitorsArray.length; i++) {
  if (visitorsArray[i] == max) months.push(monthNamesArray[i]);
}

document.write('Maximum Monthly Visitors of  ' 
                + max + ' was in ' 
                + months.join(' & ');

Open in new window

0
 
buzzy333Author Commented:
Hi guys.

for the question posed. I cannot use any other variables and command and should use the following structured code:

For each day
      If the vistors  that month equals the maximum
            Write out ‘the greatest monthly visitors was on ‘
       Write out abbreviated name of the month followed by a space
      End if
End for.

Cheers

guys
0
 
sjklein42Commented:
Do you really mean "For each day" ?  I'm guessing you meant "For each month".

This should do it:

var maximumVisitors; 
var visitorsArray = [88,62,200,100,200,34,123,34,76,199,145,11] ;
var monthNamesArray = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec']; 

maximumVisitors = 0;

for (var month = 0; month < visitorsArray.length-1; month++) 
{
    if (visitorsArray[month] > maximumVisitors) 
    {
        maximumVisitors = visitorsArray[month];
    }
}

for (var month = 0; month < visitorsArray.length-1; month++) 
{
    if (visitorsArray[month] == maximumVisitors)
    {
        document.write("the greatest monthly visitors was on '  + monthNamesArray[month] + ' ');
    }
}

Open in new window

0
 
Göran AnderssonCommented:
I cannot use any other variables and command and should use the following structured code

Why? Is this a homework assignment?
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.