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node_modules/underscore/modules/contains.js

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+import isArrayLike from './_isArrayLike.js';
+import values from './values.js';
+import indexOf from './indexOf.js';
+
+// Determine if the array or object contains a given item (using `===`).
+export default function contains(obj, item, fromIndex, guard) {
+  if (!isArrayLike(obj)) obj = values(obj);
+  if (typeof fromIndex != 'number' || guard) fromIndex = 0;
+  return indexOf(obj, item, fromIndex) >= 0;
+}