依赖文件

node_modules/underscore/modules/indexOf.js

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+import sortedIndex from './sortedIndex.js';
+import findIndex from './findIndex.js';
+import createIndexFinder from './_createIndexFinder.js';
+
+// Return the position of the first occurrence of an item in an array,
+// or -1 if the item is not included in the array.
+// If the array is large and already in sort order, pass `true`
+// for **isSorted** to use binary search.
+export default createIndexFinder(1, findIndex, sortedIndex);