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Javascript / Client Side Development
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Help with Math.abs()
Anyone any idea why the Math.abs() isn't working in this code? I
thought it was supposed to convert negative numbers to whole numbers?
var se = [-27, -27, -27];
var time = 100
if(se[0] < 0){
Math.abs(se[0]); //<-- this isn't converting it to a whole number
se[0] += 1;
se[0] = (se[0]/(time / 4));
}
The result I get is -1.04 when it should be 1.12
On May 21, 4:58 pm, Yansky <thegoodd@gmail.com> wrote:
> Math.abs(se[0]); //<-- this isn't converting it to a whole number
Not to a whole number, but to a positive number. Whole numbers have
nothing to do with Math.abs()
Math.abs() is a method that returns the value of its numeric argument
with sign set to positive. The argument itself doesn't change.
Math.abs(se[0]);
gets positive value of se[0] as requested - try
alert(Math.abs(se[0])); - but as you don't store this value anywhere
it gets lost. The actual value of se[0] is not affected by this
operation, in your case it remains negative. Either use intermediary
variable to store the value or for simple transformations:
se[0] = Math.abs(se[0])/(time / 4);
On May 21, 11:21 pm, VK <schools_r@yahoo.com> wrote:
> On May 21, 4:58 pm, Yansky <thegoodd @gmail.com> wrote: > but as you don't store this value anywhere > it gets lost.
Yansky wrote on 21 mei 2007 in comp.lang.javascript:
> Anyone any idea why the Math.abs() isn't working in this code? I > thought it was supposed to convert negative numbers to whole numbers? > Math.abs(se[0]); //<-- this isn't converting it to a whole number
this is not returning anything,
not even a positive number or zero.
Try:
result = Math.abs(se[0]);
--
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)
On May 21, 6:52 pm, "Evertjan." <exjxw.hannivo@interxnl.net> wrote:
> > Math.abs(se[0]); //<-- this isn't converting it to a whole number > Next to what VK told you about abs,
> this is not returning anything,
> not even a positive number or zero.
var se = [-27, -27, -27];
var result = Math.abs(se[0]);
window.alert(result); // alerts "27"
VK wrote on 21 mei 2007 in comp.lang.javascript:
> On May 21, 6:52 pm, "Evertjan." <exjxw.hannivo @interxnl.net> wrote: >> > Math.abs(se[0]); //<-- this isn't converting it to a whole number >> Next to what VK told you about abs,
>> this is not returning anything,
>> not even a positive number or zero.
> Why?
> var se = [-27, -27, -27];
> var result = Math.abs(se[0]);
"var result = "
was not in the code of the OP.
> window.alert(result); // alerts "27"
--
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)
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