Function definition: Difference between revisions

Content added Content deleted

Inline

@@ Line 2,223: / Line 2,223: @@
 map times3, [1, 2, 3]</syntaxhighlight>
-=== impure functions (I/O) ===
+=== impure effects ===
-Impure functions must be declared as such.
+Functions with impure effects must be declared as such, using fn*.
-<syntaxhighlight>val writeit = impure fn(x) { writeln x }</syntaxhighlight>
+<syntaxhighlight>
+val writeit = fn*(x) { writeln x }
+</syntaxhighlight>
 Impure functions cannot be passed to pure functions.