Scheme/Procedures

From Noisebridge
Jump to: navigation, search

Lambdas[edit]

  • Can also be viewed as anonymous procedures.
  • Has the following syntax:
(lambda <args> <expressions>)

where <expressions> is one or more, well, expressions. Only the last expression's value is returned.
<args> is your variable definitions, which can take the following forms:

  • var - all arguments are put into this single variable (as a list.)
  • (var[1] var[2] ... ) - specifies a fixed number of arguments.
  • (var[1] var[2] ... . var[n]) - a space-delimited period before the final argument specifies the remaining args (if any) to be put into a list under that variable.


Lexical Scoping[edit]

fluid-let[edit]

Modifies existing global variables instead of introducing new lexical ones. Values are reset at the end of the expression.

Iteration[edit]

do[edit]

(do
  ((<var> <init> <step>) ... )
   (<test> <expression>)
   (<command> ... ))