Rename js snippets

snippets/js/s/converge-branching-functions.md

@@ -0,0 +1,27 @@
+---
+title: Converge branching functions
+type: snippet
+language: javascript
+tags: [function]
+excerpt: Converges a list of branching functions into a single function and returns the result.
+cover: golden-gate-bridge
+dateModified: 2021-01-08T00:23:44+02:00
+---
+
+Accepts a converging function and a list of branching functions and returns a function that applies each branching function to the arguments and the results of the branching functions are passed as arguments to the converging function.
+
+- Use `Array.prototype.map()` and `Function.prototype.apply()` to apply each function to the given arguments.
+- Use the spread operator (`...`) to call `converger` with the results of all other functions.
+
+```js
+const converge = (converger, fns) => (...args) =>
+  converger(...fns.map(fn => fn.apply(null, args)));
+```
+
+```js
+const average = converge((a, b) => a / b, [
+  arr => arr.reduce((a, v) => a + v, 0),
+  arr => arr.length
+]);
+average([1, 2, 3, 4, 5, 6, 7]); // 4
+```