From f74c10be6069e771c874505f6bd94011450ddd87 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Sun, 28 Jan 2018 15:04:21 +0200
Subject: [PATCH] Add rearg

---
 snippets/rearg.md | 25 +++++++++++++++++++++++++
 tag_database      |  1 +
 2 files changed, 26 insertions(+)
 create mode 100644 snippets/rearg.md

diff --git a/snippets/rearg.md b/snippets/rearg.md
new file mode 100644
index 000000000..f58ea2f58
--- /dev/null
+++ b/snippets/rearg.md
@@ -0,0 +1,25 @@
+### rearg
+
+Creates a function that invokes the provided function with its arguments arranged according to the specified indexes.
+
+Use `Array.reduce()` and `Array.indexOf()` to reorder arguments based on `indexes` in combination with the spread operator (`...`) to pass the transformed arguments to `fn`.
+
+```js
+const rearg = (fn, indexes) => (...args) =>
+  fn(
+    ...args.reduce(
+      (acc, val, i) => ((acc[indexes.indexOf(i)] = val), acc),
+      Array.from({ length: indexes.length })
+    )
+  );
+```
+
+```js
+var rearged = rearg(
+  function(a, b, c) {
+    return [a, b, c];
+  },
+  [2, 0, 1]
+);
+rearged('b', 'c', 'a'); // ['a', 'b', 'c']
+```
diff --git a/tag_database b/tag_database
index 8a8a891bc..18fa151c3 100644
--- a/tag_database
+++ b/tag_database
@@ -187,6 +187,7 @@ randomIntArrayInRange:math,utility,random
 randomIntegerInRange:math,utility,random
 randomNumberInRange:math,utility,random
 readFileLines:node,array,string
+rearg:adapter,function
 redirect:browser,url
 reducedFilter:array
 reduceSuccessive:array,function