From 02d157cb90e98216dce28fba77833e7fe1e271e3 Mon Sep 17 00:00:00 2001
From: Mark Erikson <mark@isquaredsoftware.com>
Date: Tue, 31 Oct 2023 21:30:17 -0400
Subject: [PATCH] Add example of arguments mapping

---
 README.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/README.md b/README.md
index ef6ded2c3..0074f3d77 100644
--- a/README.md
+++ b/README.md
@@ -531,6 +531,17 @@ A: Yes. Reselect has no dependencies on any other package, so although it was de
 
 ### Q: How do I create a selector that takes an argument?
 
+Conceptually, Reselect works like this internally:
+
+```ts
+const finalSelector = (...args) => {
+  const extractedValues = inputFunctions.map(input => input(...args));
+  return output(...extractedValues);
+}
+```
+
+In other words, all the arguments passed to the selector function are immediately passed to all of the inputs.
+
 As shown in the API reference section above, provide input selectors that extract the arguments and forward them to the output selector for calculation:
 
 ```js
@@ -546,6 +557,7 @@ const selectItemsByCategory = createSelector(
 )
 ```
 
+
 More generally, you can have N arguments passed to the selector, and you can have M input functions extracting values from any of those arguments.  All M extracted values get passed to the output function.
 
 ### Q: The default memoization function is no good, can I use a different one?