Merge pull request #249 from puffnfresh/bug/list-backwards-traverseio

jbgi · jbgi · commit b707324f8eb2 · 2016-05-16T10:02:56.000+02:00
Fix backwards List#traverseIO
diff --git a/core/src/main/java/fj/data/List.java b/core/src/main/java/fj/data/List.java
@@ -640,7 +640,7 @@ public <B> P1<List<B>> traverseP1(final F<A, P1<B>> f){
 
     public <B> IO<List<B>> traverseIO(F<A, IO<B>> f) {
         return this.foldRight(
-                (a, acc) -> IOFunctions.bind(acc, (bs) -> IOFunctions.map(f.f(a), b -> bs.cons(b))),
+                (a, acc) -> IOFunctions.bind(f.f(a), b -> IOFunctions.map(acc, bs -> bs.cons(b))),
                 IOFunctions.unit(List.<B>nil())
         );
     }

Original file line number	Diff line number	Diff line change
`@@ -640,7 +640,7 @@ public <B> P1<List<B>> traverseP1(final F<A, P1<B>> f){`
`640`	`640`
`641`	`641`	`public <B> IO<List<B>> traverseIO(F<A, IO<B>> f) {`
`642`	`642`	`return this.foldRight(`
`643`		`- (a, acc) -> IOFunctions.bind(acc, (bs) -> IOFunctions.map(f.f(a), b -> bs.cons(b))),`
	`643`	`+ (a, acc) -> IOFunctions.bind(f.f(a), b -> IOFunctions.map(acc, bs -> bs.cons(b))),`
`644`	`644`	`IOFunctions.unit(List.<B>nil())`
`645`	`645`	`);`
`646`	`646`	`}`