From 88d1ef03cfa87ebe4813a3d9fcf6642ea2f39f0c Mon Sep 17 00:00:00 2001
From: Daniel Manson <danielmanson.uk@gmail.com>
Date: Tue, 26 May 2020 19:20:27 +0100
Subject: [PATCH] use Set.has instead of Array.indexOf

---
 index.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/index.js b/index.js
index f5cc7f64e0..3380c351ef 100644
--- a/index.js
+++ b/index.js
@@ -1,19 +1,19 @@
 var fs = require('fs');
 var tldjs = require('tldjs');
 
-var disposable = fs.readFileSync(__dirname + '/data/disposable.txt').toString().split('\n');
-var free = fs.readFileSync(__dirname + '/data/free.txt').toString().split('\n').concat(disposable);
+var disposable = new Set(fs.readFileSync(__dirname + '/data/disposable.txt').toString().split('\n'));
+var free = new Set(fs.readFileSync(__dirname + '/data/free.txt').toString().split('\n').concat(disposable));
 
 function isFree(email) {
     if (typeof email !== 'string') throw new TypeError('email must be a string');
     var domain = tldjs.getDomain(email.split('@').pop());
-    return free.indexOf(domain) !== -1;
+    return free.has(domain);
 }
 
 function isDisposable(email) {
     if (typeof email !== 'string') throw new TypeError('email must be a string');
     var domain = tldjs.getDomain(email.split('@').pop());
-    return disposable.indexOf(domain) !== -1;
+    return disposable.has(domain);
 }
 
 module.exports = {