From 4a72f3c93613cfe18ffaecdc5296974d7895b0db Mon Sep 17 00:00:00 2001
From: qinsfu <44136546+qxdi@users.noreply.github.com>
Date: Wed, 6 May 2020 16:44:43 +0800
Subject: [PATCH 1/2] Update index.js

 More like functional programming
---
 index.js | 33 +++++++++++++--------------------
 1 file changed, 13 insertions(+), 20 deletions(-)

diff --git a/index.js b/index.js
index e0190bf..9270b96 100644
--- a/index.js
+++ b/index.js
@@ -1,24 +1,17 @@
 
 module.exports = function newArray(start, end) {
-    var n0 = typeof start === 'number',
-        n1 = typeof end === 'number'
+  start = +start;
+  end = +end;
+  if (!isNaN(start) && isNaN(end)) {
+    end = start;
+    start = 0;
+  } else if (isNaN(start) && isNaN(end)) {
+    start = end = 0;
+  }
 
-    if (n0 && !n1) {
-        end = start
-        start = 0
-    } else if (!n0 && !n1) {
-        start = 0
-        end = 0
-    }
+  var len = end - start;
+  if (len < 0) throw new Error("array length must be positive");
 
-    start = start|0
-    end = end|0
-    var len = end-start
-    if (len<0)
-        throw new Error('array length must be positive')
-    
-    var a = new Array(len)
-    for (var i=0, c=start; i<len; i++, c++)
-        a[i] = c
-    return a
-}
\ No newline at end of file
+  var a = new Array(len).fill(start).map((x, y) => x + y);
+  return a;
+}

From 7d595c106f3289b16432f1f99270302d8052939e Mon Sep 17 00:00:00 2001
From: qinsfu <44136546+qxdi@users.noreply.github.com>
Date: Wed, 6 May 2020 16:56:47 +0800
Subject: [PATCH 2/2] Update index.js

replace all `var` keyworks with `const`
---
 index.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/index.js b/index.js
index 9270b96..3ad4c6d 100644
--- a/index.js
+++ b/index.js
@@ -9,9 +9,9 @@ module.exports = function newArray(start, end) {
     start = end = 0;
   }
 
-  var len = end - start;
+  const len = end - start;
   if (len < 0) throw new Error("array length must be positive");
 
-  var a = new Array(len).fill(start).map((x, y) => x + y);
+  const a = new Array(len).fill(start).map((x, y) => x + y);
   return a;
-}
+};