Quotient *and* Remainder

[Anthony Ortiz]

Hello everyone,

I am able to get the quotient or remainder by doing the following :

(quot 22 7)

-> 3

(rem 22 7)

-> 1

Is there a way to get back both the quotient and the remainder in one calculation rather than performing two separate calculations? And I don't mean writing a function that does both calculations behind the scenes and returning a list of both results.

Cheers!

Anthony

[Sam Ritchie]

So you DON'T mean:

(juxt quot rem)

?

Anthony Ortiz

April 9, 2014 11:01 AM

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[Ben Wolfson]

Many languages expose a quotrem or divmod function that returns both at once, since they can both be calculated at once.

Ben Wolfson
"Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure." [Larousse, "Drink" entry]

[Anthony Ortiz]

No because that's simply calling what is essentially the same function twice. Internally the quotient and remainder functions are the same, the only difference is which part of the result they return. If I call the quotient function and then I call the remainder function then I am performing the same exact division twice and from a performance perspective I am wondering if there's a function that returns both values but only performs the division calculation once.

[James Reeves]

AFAIK, the JVM doesn't have a bytecode instruction for this, and therefore there's no mechanism to do this in Clojure except by using quot and rem separately.

- James

[Anthony Ortiz]

Ah yes of course... the same applies to the CLR.