On Tuesday, February 10, 2015 at 3:08:56 PM UTC-5, J David Eisenberg wrote: > The following work fine in the ClojureScript REPL: > > (+) > (*) > > and yield 0 and 1 as results. However, these: > > (-) > (/) > > throw exceptions, the base cause being wrong number of arguments passed. > > Why this disparity? Not that I'm going to be writing code like that, as it is > terrible programming practice. It's just a matter of "enquiring minds want to > know."
This is simply because the additive identity is 0 and the multiplicative identity is 1, and because addition and multiplication are associative it matters not what order the operands are applied in. Therefore their respective identities can safely be applied first (and anywhere) without affecting the result. Subtraction and division lack these properties. -- Note that posts from new members are moderated - please be patient with your first post. --- You received this message because you are subscribed to the Google Groups "ClojureScript" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/clojurescript.
