remove old fgfm code, general cleanup

lib/utils.js

@@ -0,0 +1,50 @@
+// Converts seconds to human-readable time
+String.prototype.toHHMMSS = function () {
+  let sec_num = parseInt(this, 10); // don't forget the second param
+  let hours = Math.floor(sec_num / 3600);
+  let minutes = Math.floor((sec_num - hours * 3600) / 60);
+  let seconds = sec_num - hours * 3600 - minutes * 60;
+
+  if (hours < 10) {
+    hours = "0" + hours;
+  }
+  if (minutes < 10) {
+    minutes = "0" + minutes;
+  }
+  if (seconds < 10) {
+    seconds = "0" + seconds;
+  }
+  return hours + ":" + minutes + ":" + seconds;
+};
+
+async function asyncForEach(array, callback) {
+  for (let index = 0; index < array.length; index++) {
+    await callback(array[index], index, array);
+  }
+}
+
+function randElement(arr) {
+  return arr[Math.floor(Math.random() * arr.length)];
+}
+
+function randSort() {
+  return 0.5 - Math.random();
+}
+
+function chunkSubstr(str, size) {
+  const numChunks = Math.ceil(str.length / size);
+  const chunks = new Array(numChunks);
+
+  for (let i = 0, o = 0; i < numChunks; ++i, o += size) {
+    chunks[i] = str.substr(o, size);
+  }
+
+  return chunks;
+}
+
+module.exports = {
+  asyncForEach,
+  randElement,
+  randSort,
+  chunkSubstr
+};