planning

node_modules/redux/src/compose.js

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+/**
+ * Composes single-argument functions from right to left. The rightmost
+ * function can take multiple arguments as it provides the signature for
+ * the resulting composite function.
+ *
+ * @param {...Function} funcs The functions to compose.
+ * @returns {Function} A function obtained by composing the argument functions
+ * from right to left. For example, compose(f, g, h) is identical to doing
+ * (...args) => f(g(h(...args))).
+ */
+
+export default function compose(...funcs) {
+  if (funcs.length === 0) {
+    return (arg) => arg
+  }
+
+  if (funcs.length === 1) {
+    return funcs[0]
+  }
+
+  return funcs.reduce((a, b) => (...args) => a(b(...args)))
+}