JavaScript Liquid Handling Robot

Question

I have the following code (Using https://www.w3schools.com/js/ Because i don't know how else to test it)

<p id="demo"></p>

<script>

var a,b,c,d,e,text = "",x,y;
a = 25
b = Math.floor( a / 8 )
c = a - ( b * 8)
if (c == 0)
c = 8;
d = Math.ceil ( a / 8 )
e = 8
for (y = 1; y <= d; y++) {
    for (x = 1; x <= e; x++) {
    text += "<br>" + x + "," + y;
    }
}
document.getElementById("demo").innerHTML = text;
</script>

I was hoping that when var a (user input) was set to any number between 1 and 96 it would give all the coordinates from 1,1 to that number of well (on a 96 well plate A1 to H12.

eg. var a = 25 would give 1,1 2,1 3,1 4,1 5,1 6,1 7,1 8,1 1,2 2,2 3,2 4,2 5,2 6,2 7,2 8,2 1,3 2,3 3,3 4,3 5,3 6,3 7,3 8,3 1,4 and stop. Instead it finishes off the rest of the column 2,4 3,4 4,4 5,4 6,4 7,4 8,4 and then stops.

How do I get it to stop in the right place??

Thank you

AngYC · Accepted Answer · 2017-11-05T22:52:59.513

0

This should works, hope it helps!

var text = "", start = 8, end = 25;

for (var i = start; i < end; i++) {
    text += "<br>" + ((i % 8) + 1) + "," + (Math.floor(i / 8) + 1)
}

document.getElementById("demo").innerHTML = text;

<p id="demo"></p>

edited Nov 05 '17 at 22:52

answered Nov 05 '17 at 21:43

AngYC

3,051
6
20

This (Math.floor(i / 8) + 1) + "," + ((i % 8) + 1) was the wrong way round but it worked like a charm. It was easy to change round. I don't get the modulus bit at all, I'll have to read up on that. Cheers – Rufus Long Nov 05 '17 at 22:23
Is there a way to make this code start from 1,2 or 2,1?? – Rufus Long Nov 05 '17 at 22:49
Code updated, you can change the value of `start` and `end` – AngYC Nov 05 '17 at 22:53
Awesome, Thanks. – Rufus Long Nov 05 '17 at 23:10

JavaScript Liquid Handling Robot

1 Answers1