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diff --git a/node_modules/array-find-index/index.js b/node_modules/array-find-index/index.js
new file mode 100644
index 0000000..e2dcd9a
--- /dev/null
+++ b/node_modules/array-find-index/index.js
@@ -0,0 +1,25 @@
+'use strict';
+module.exports = function (arr, predicate, ctx) {
+ if (typeof Array.prototype.findIndex === 'function') {
+ return arr.findIndex(predicate, ctx);
+ }
+
+ if (typeof predicate !== 'function') {
+ throw new TypeError('predicate must be a function');
+ }
+
+ var list = Object(arr);
+ var len = list.length;
+
+ if (len === 0) {
+ return -1;
+ }
+
+ for (var i = 0; i < len; i++) {
+ if (predicate.call(ctx, list[i], i, list)) {
+ return i;
+ }
+ }
+
+ return -1;
+};