I am looking at the definition of fn and I can't see where let is used inside the function definition: https://github.com/clojure/clojure/blob/master/src/clj/clojure/core.clj#L4335
I think they're saying the binding forms are equivalent in power (destructuring), not implementation. On Wed, Jul 22, 2015 at 8:07 AM Johnny Wong <zhanlandet...@gmail.com> wrote: > page 27(pdf version): > " > > Local Bindings: let > > > let allows you to define named references that are lexically scoped to > the extent of the let expression. Said another way, let defines locals. > ...... > ... > > Note that let is implicitly used anywhere locals are required. In > particular, fn (and therefore all other function-creation and > function-definition forms like defn) uses let to bind function parameters > as locals within the scope of the function being defined. For example, x and > y in the hypot function above are let-bound by defn. *So, the vector that > defines the set of bindings for a let scope obeys the same semantics > whether it is used to define function parameters or an auxiliary local > binding scope.* > > > *"* > > i am confused about the text in red. apparently ,the vector used for > let locale binding is not the same as the vector used for function > parameters , for example > > > (defn hypot > > [x y] > > (let [x2 (* x x) y2 (* y y)] > > (Math/sqrt (+ x2 y2))) > > ) > > > the second line [x y] vector says the function has two parameter, it > doesn't mean let x=y, while , the third line ,it means let x2=(* x x), it > is set value operation. > > > is it a book error ? > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
