Added debounce util function

functions/utils/debounce.js

@@ -0,0 +1,15 @@
+// Debounce is a higher order function which makes its enclosed function be executed
+// only if the function wasn't called again till 'delay' time has passed, this helps reduce impact of heavy working
+// functions which might be called frequently
+// NOTE : Don't use lambda functions as this doesn't get bound properly in them, use the 'function (args) {}' format
+const debounce = (func, delay) => {
+  let inDebounce
+  return function() {
+    const context = this
+    const args = arguments
+    clearTimeout(inDebounce)
+    inDebounce = setTimeout(() => func.apply(context, args), delay)
+  }
+}
+
+export default debounce;