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snippets/initialize-nd-array.md

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+---
+title: Initialize n-dimensional array
+tags: array,recursion
+cover: colorful-pots
+firstSeen: 2018-04-14T10:52:39+03:00
+lastUpdated: 2020-10-22T20:23:47+03:00
+---
+
+Create a n-dimensional array with given value.
+
+- Use recursion.
+- Use `Array.from()`, `Array.prototype.map()` to generate rows where each is a new array initialized using `initializeNDArray()`.
+
+```js
+const initializeNDArray = (val, ...args) =>
+  args.length === 0
+    ? val
+    : Array.from({ length: args[0] }).map(() =>
+        initializeNDArray(val, ...args.slice(1))
+      );
+```
+
+```js
+initializeNDArray(1, 3); // [1, 1, 1]
+initializeNDArray(5, 2, 2, 2); // [[[5, 5], [5, 5]], [[5, 5], [5, 5]]]
+```