Rename js snippets

snippets/js/s/chunk-iterable.md

@@ -0,0 +1,34 @@
+---
+title: Chunk iterable
+type: snippet
+language: javascript
+tags: [function,generator,array]
+author: chalarangelo
+cover: two-doors
+dateModified: 2021-03-16T22:50:40+02:00
+---
+
+Chunks an iterable into smaller arrays of a specified size.
+
+- Use a `for...of` loop over the given iterable, using `Array.prototype.push()` to add each new value to the current `chunk`.
+- Use `Array.prototype.length` to check if the current `chunk` is of the desired `size` and `yield` the value if it is.
+- Finally, use `Array.prototype.length` to check the final `chunk` and `yield` it if it's non-empty.
+
+```js
+const chunkify = function* (itr, size) {
+  let chunk = [];
+  for (const v of itr) {
+    chunk.push(v);
+    if (chunk.length === size) {
+      yield chunk;
+      chunk = [];
+    }
+  }
+  if (chunk.length) yield chunk;
+};
+```
+
+```js
+const x = new Set([1, 2, 1, 3, 4, 1, 2, 5]);
+[...chunkify(x, 2)]; // [[1, 2], [3, 4], [5]]
+```