Find the missing permutation: Difference between revisions

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@@ Line 1,166: / Line 1,166: @@
     return transpose(xs.split(' ')
             .map(x => x.split('')))
-        .map(col => col.reduce((a, x) => { // char count in each of N columns ?
+        .map(col => col.reduce((a, x) => (
-            return (
+            a[x] = (a[x] || 0) + 1,
-                a[x] = (a[x] || 0) + 1,
+            a
-                a
+        ), {}))
-            );
-        }, {}))
         .map(dct => { // character with frequency below mean of distribution ?
             let ks = Object.keys(dct),