Remove .find usage

www/index-android.js

@@ -8,36 +8,6 @@
 
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-/**
- *
- * Array.find() Polyfill
- * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find
- *
- */
-if (!Array.prototype.find) {
-  Array.prototype.find = function(predicate) {
-    if (this === null) {
-      throw new TypeError('Array.prototype.find called on null or undefined');
-    }
-    if (typeof predicate !== 'function') {
-      throw new TypeError('predicate must be a function');
-    }
-    var list = Object(this);
-    var length = list.length >>> 0;
-    var thisArg = arguments[1];
-    var value;
-
-    for (var i = 0; i < length; i++) {
-      value = list[i];
-      if (predicate.call(thisArg, value, i, list)) {
-        return value;
-      }
-    }
-    return undefined;
-  };
-}
-
-'use strict';
 
 /*!
  *
@@ -59,9 +29,17 @@ utils.errors = {
 };
 
 utils.validArrayOfStrings = function (val) {
-  return val && Array.isArray(val) && val.length > 0 && !val.find(function (i) {
-    return !i.length || typeof i !== 'string';
-  });
+
+  var containsIllegal = false;
+
+  for (var i in val) {
+    if (!i.length || typeof i !== 'string') {
+      containsIllegal = true;
+      break;
+    }
+  }
+
+  return val && Array.isArray(val) && val.length > 0 && !containsIllegal;
 };
 
 utils.validString = function (val) {
@@ -182,4 +160,4 @@ inAppPurchase.getReceipt = function () {
   return Promise.resolve('');
 };
 
-module.exports = inAppPurchase;
+module.exports = inAppPurchase;