major tidy

src/components/Subject.js

@@ -0,0 +1,30 @@
+import React, { PureComponent } from 'react'
+
+import Question from '../Question'
+
+class Subject extends PureComponent {
+  render () {
+    const { subj } = this.props
+
+    if (subj) {
+      return (
+        <div >
+          {subj.Questions.map((question, i) => {
+            return (
+              <Question
+                key={i}
+                question={question}
+              />
+            )
+          })}
+        </div>
+      )
+    } else {
+      return (
+        <div />
+      )
+    }
+  }
+}
+
+export default Subject