Kebab file names

snippets/bind-key.md

@@ -0,0 +1,28 @@
+---
+title: Bind object method
+tags: function,object
+cover: oven-paddle
+firstSeen: 2018-01-24T14:22:43+02:00
+lastUpdated: 2020-10-18T23:04:45+03:00
+---
+
+Creates a function that invokes the method at a given key of an object, optionally prepending any additional supplied parameters to the arguments.
+
+- Return a `function` that uses `Function.prototype.apply()` to bind `context[fn]` to `context`.
+- Use the spread operator (`...`) to prepend any additional supplied parameters to the arguments.
+
+```js
+const bindKey = (context, fn, ...boundArgs) => (...args) =>
+  context[fn].apply(context, [...boundArgs, ...args]);
+```
+
+```js
+const freddy = {
+  user: 'fred',
+  greet: function(greeting, punctuation) {
+    return greeting + ' ' + this.user + punctuation;
+  }
+};
+const freddyBound = bindKey(freddy, 'greet');
+console.log(freddyBound('hi', '!')); // 'hi fred!'
+```