回答編集履歴

修正

2016/10/05 07:10

投稿

スコア5223

answer CHANGED Viewed

@@ -29,8 +29,8 @@
     {}
 );
-console.log(countToChars);
+console.log(countToArrays);
-console.log(countToChars[2]);
+console.log(countToArrays[2]);
 ```
 さらにBabelでコンパイルする前提なら， countToArrays の生成時に

修正

2016/10/05 07:10

投稿

スコア5223

answer CHANGED Viewed

@@ -33,7 +33,7 @@
 console.log(countToChars[2]);
 ```
-さらにBabelでコンパイルする前提なら， countToChars の生成時に
+さらにBabelでコンパイルする前提なら， countToArrays の生成時に
 ```JavaScript
 const countToArrays = Object.entries(serialToCount).reduce(

修正

2016/10/05 07:05

投稿

スコア5223

answer CHANGED Viewed

@@ -11,19 +11,19 @@
     ["え","お"],
 ];
-const chars = [].concat(...groups);
+const serials = groups.map(JSON.stringify);
-const charToCount = chars.reduce(
+const serialToCount = serials.reduce(
-    (map, char) => (
+    (map, serial) => (
-        map[char] = (map[char] || 0) + 1,
+        map[serial] = (map[serial] || 0) + 1,
         map
     ),
     {}
 );
-const countToChars = Object.keys(charToCount).reduce(
+const countToArrays = Object.keys(serialToCount).reduce(
-    (map, char) => (
+    (map, serial) => (
-        (map[charToCount[char]] = map[charToCount[char]] || []).push(char),
+        (map[serialToCount[serial]] = map[serialToCount[serial]] || []).push(JSON.parse(serial)),
         map
     ),
     {}
@@ -36,9 +36,9 @@
 さらにBabelでコンパイルする前提なら， countToChars の生成時に
 ```JavaScript
-const countToChars = Object.entries(charToCount).reduce(
+const countToArrays = Object.entries(serialToCount).reduce(
-    (map, [char, count]) => (
+    (map, [serial, count]) => (
-        (map[count] = (map[count] || [])).push(char),
+        (map[count] = (map[count] || [])).push(JSON.parse(serial)),
         map
     ),
     {}

Babel

2016/10/05 07:04

投稿

スコア5223

answer CHANGED Viewed

@@ -45,4 +45,4 @@
 );
 ```
-として分割代入を使ったほうがきれいですね．
+として`Object.entries`と分割代入を使ったほうがきれいですね．

Babel

2016/10/05 06:52

投稿

スコア5223

answer CHANGED Viewed

@@ -28,4 +28,21 @@
     ),
     {}
 );
+console.log(countToChars);
+console.log(countToChars[2]);
-```
+```
+さらにBabelでコンパイルする前提なら， countToChars の生成時に
+```JavaScript
+const countToChars = Object.entries(charToCount).reduce(
+    (map, [char, count]) => (
+        (map[count] = (map[count] || [])).push(char),
+        map
+    ),
+    {}
+);
+```
+として分割代入を使ったほうがきれいですね．

冗長

2016/10/05 06:51

投稿

スコア5223

answer CHANGED Viewed

@@ -23,7 +23,7 @@
 const countToChars = Object.keys(charToCount).reduce(
     (map, char) => (
-        (map[charToCount[char]] = (map[charToCount[char]] || [])).push(char),
+        (map[charToCount[char]] = map[charToCount[char]] || []).push(char),
         map
     ),
     {}