Fixed falsy test to exclude 0

Author: tangledbytes

src/generateUniqueID.ts

@@ -1,3 +1,5 @@
+import isFalsy from './isFalsy'
+
 const { Snowflake } = require('../build/Release/snowflake');
 
 const CUSTOM_EPOCH = 1546300800000; // 01-01-2019
@@ -14,6 +16,8 @@ const initConfig: Config = {
     returnNumber: false
 }
 
+
+
 /**
  * Constructs a UniqueID object which stores method for generation
  * of a unique 64 bit time sortable id and a method for retreiving
@@ -40,7 +44,9 @@ export class UniqueID {
 
         // A 12 bit machine id, if not passed in then a random id will be used
         // Ternary operator was used to make sure "0" isn't considered to be falsy.
-        this._MACHINE_ID = config.machineID !== undefined ? config.machineID : Math.floor(Math.random() * MAX_MACHINE_ID);
+        this._MACHINE_ID = (
+            !isFalsy(config.machineID) ? config.machineID : Math.floor(Math.random() * MAX_MACHINE_ID)
+        ) as number;
 
         // Check if the number is satisfies all the conditions
         if (!Number.isInteger(this._MACHINE_ID)) throw Error("Machine Id should be a decimal number");

src/isFalsy.ts

@@ -0,0 +1,7 @@
+export default (value: any) => {
+    if (value === undefined) return true;
+    if (isNaN(value)) return true;
+    if (Array.isArray(value) && !value.length) return true;
+    if (value === "") return true;
+    if (value === null) return true;
+}