Any equivalent to Java's Double.doubleTo LongBits()?

[chad_walters]

Does JavaScript have a mechanism to provide the equivalent of Java's
Double.doubleTo LongBits() and the reverse operation
Double.longBits ToDouble?

http://java.sun.com/j2se/1.4.2/docs/...ongBits(double)

Thanks in advance for any help.

Chad

[Henry]

On Feb 6, 8:22 am, chad_walt...@ya hoo.com wrote:

Does JavaScript have a mechanism to provide the equivalent of
Java's Double.doubleTo LongBits() and the reverse operation
Double.longBits ToDouble?

<snip>

No such facility exists in javascript, and as javascript only has one
number type and it is an IEEE double precision floating point number
the limit of numerically representable integers is 53 bits. So the bit
pattern of an IEEE double precision floating point number cannot be
represented as a (single) numeric integer value in javascript.

[Dr J R Stockton]

In comp.lang.javas cript message <169621bd-7a0d-4b75-97c3-c3afdc0d743e@f4
7g2000hsd.googl egroups.com>, Wed, 6 Feb 2008 00:22:29,
ch**********@ya hoo.com posted:

>Does JavaScript have a mechanism to provide the equivalent of Java's
Double.doubleT oLongBits() and the reverse operation
Double.longBit sToDouble?

http://java.sun.com/j2se/1.4.2/docs/...html#doubleToL
ongBits(double )

Not intrinsically, whatever those operations mat be - and you could have
given a better explanation.

However, one can code conversion of a JavaScript Number (IEEE Double)
to/from a bit string representing a Double (and the same for one
representing a Single).

See <URL:http://www.merlyn.demo n.co.uk/js-misc0.htm- works in AFAIK
all browsers, but best read in MS IE.

It's a good idea to read the newsgroup c.l.j and its FAQ. See below.

--
(c) John Stockton, nr London UK. ?@merlyn.demon. co.uk IE6 IE7 FF2 Op9 Sf3
news:comp.lang. javascript FAQ <URL:http://www.jibbering.c om/faq/index.html>.
<URL:http://www.merlyn.demo n.co.uk/js-index.htmjscr maths, dates, sources.
<URL:http://www.merlyn.demo n.co.uk/TP/BP/Delphi/jscr/&c, FAQ items, links.