From 5a90166db2eb79a2241d00a46c02fda133772387 Mon Sep 17 00:00:00 2001
From: maple3142 <kirby741852963@gmail.com>
Date: Sat, 14 Apr 2018 15:52:39 +0800
Subject: [PATCH] Add initializeNDArray

---
 snippets/initializeNDArray.md | 16 ++++++++++++++++
 tag_database                  |  1 +
 2 files changed, 17 insertions(+)
 create mode 100644 snippets/initializeNDArray.md

diff --git a/snippets/initializeNDArray.md b/snippets/initializeNDArray.md
new file mode 100644
index 000000000..5992adc36
--- /dev/null
+++ b/snippets/initializeNDArray.md
@@ -0,0 +1,16 @@
+### initializeNDArray
+
+Create a n-dimensional array with given value.
+
+Use `Array.map()` to generate rows where each is a new array initialize with `initializeNDArray`.
+
+```js
+const initializeNDArray = (defval, ...args)=>
+  args.length===0 ? defval : Array.from({ length: args[0] }).map(() => initializeNDArray(defval, ...args.slice(1)));
+```
+
+```js
+initializeNDArray(1,3); // [1,1,1]
+initializeNDArray(0,2,3); // [[0,0,0],[0,0,0]]
+initializeNDArray(5,2,2,2); // [[[5,5],[5,5]],[[5,5],[5,5]]]
+```
diff --git a/tag_database b/tag_database
index 7f3102125..ee70cbece 100644
--- a/tag_database
+++ b/tag_database
@@ -110,6 +110,7 @@ initialize2DArray:array
 initializeArrayWithRange:array,math
 initializeArrayWithRangeRight:array,math
 initializeArrayWithValues:array,math
+initializeNDArray:array
 inRange:math
 intersection:array,math
 intersectionBy:array,function