Beefy Boxes and Bandwidth Generously Provided by pair Networks
"be consistent"

Re: Filthy Floats

by TheoPetersen (Priest)
on Jul 16, 2001 at 20:15 UTC ( #97069=note: print w/replies, xml ) Need Help??

in reply to Filthy Floats

You could create the query using a sprintf call that prints the number of digits you expect, i.e.
$fv = sprintf("%1.2f", $dv);
where $fv is the value to put in the query and $dv is the value from the database.

What that really does is use decimal representation and string conversion to set the accuracy of the floating point value. It's equivalent to querying the database for matches to a given level of accuracy:

SELECT * FROM table WHERE abs(float - 0.98) < 0.001;
For some reason, the comparison version bothers a lot of programmers, where chopping off digits in a string representation doesn't.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://97069]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others contemplating the Monastery: (7)
As of 2016-10-24 00:38 GMT
Find Nodes?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?

    Results (302 votes). Check out past polls.