Test migration to jest by hand

Apparently using regular expressions is way easier.

test/pullAtIndex/pullAtIndex.js

@@ -0,0 +1,10 @@
+const pullAtIndex = (arr, pullArr) => {
+let removed = [];
+let pulled = arr
+.map((v, i) => (pullArr.includes(i) ? removed.push(v) : v))
+.filter((v, i) => !pullArr.includes(i));
+arr.length = 0;
+pulled.forEach(v => arr.push(v));
+return removed;
+};
+module.exports = pullAtIndex;