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Round in 5 incrimens?

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Apr 07.2008

I am coding a volume slider for my WinAMP remote, and the volume goes up in 5% increments.

The problem is in if someone changes the volume on the client side to something that doesn’t end in a 5 or 0.

Basically, what I need to have, is a function that takes a number, and returns that number rounded to the nearest 5 or 0. I’m really bad at this kind of logic. Can anyone help?

Thanks!
Chris

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JavaScript

5 Comments(s) ↴

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@kurbyApr 07.2008 — PSEUDO CODE:


[CODE]remainder = volume mod 5;
if remainder != 0
if remainder >= 3
volume += remainder - 5;
else
volume -= remainder;[/CODE]
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@Logic_AliApr 07.2008 — I am coding a volume slider for my WinAMP remote, and the volume goes up in 5% increments.

The problem is in if someone changes the volume on the client side to something that doesn't end in a 5 or 0.

Basically, what I need to have, is a function that takes a number, and returns that number rounded to the nearest 5 or 0. I'm really bad at this kind of logic. Can anyone help?

Thanks!

Chris[/quote] <script type='text/javascript'>

Number.prototype.nearest=function(x)
{
return Math.round(this/x) * x;
}

for(var i=0; i<50; i++)
document.write( i+' to the nearest 5 = ' + i.nearest(5)+'<br>');

</script>
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@mrhooApr 08.2008 — var n=Math.round(n/5)*5

like Logic's, but a one shot statement rather than a new number method.

Beginners always have problems with number methods-

you can call:

var n=54;

alert(n.nearest(5))

[B]or[/B] alert((54).nearest(5))

but you [B]can't[/B] use alert(54.nearest(5))
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@aximbigfanauthorApr 08.2008 — PSEUDO CODE:


[CODE]remainder = volume mod 5;
if remainder != 0
if remainder >= 3
volume += remainder - 5;
else
volume -= remainder;[/CODE][/QUOTE]

Can someone put this more understandably?

I have this:

function volumer()
{
var output = cur_volume mod 5;
if (output!=0)
{
if (output>=3)
output += cur_volume - 5;
else
output -= output;
}

alert(output);
}
But it doesn't work.

Thanks!

Chris
Copy linkTweet thisAlerts:
@aximbigfanauthorApr 08.2008 — var n=Math.round(n/5)*5

like Logic's, but a one shot statement rather than a new number method.

Beginners always have problems with number methods-

you can call:

var n=54;

alert(n.nearest(5))

[B]or[/B] alert((54).nearest(5))

but you [B]can't[/B] use alert(54.nearest(5))[/QUOTE]

Nevermind, this worked! Thanks Mrhoo!!!!

Chris
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