react app

react-app/node_modules/lodash/array/indexOf.js

@@ -0,0 +1,53 @@
+var baseIndexOf = require('../internal/baseIndexOf'),
+    binaryIndex = require('../internal/binaryIndex');
+
+/* Native method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
+
+/**
+ * Gets the index at which the first occurrence of `value` is found in `array`
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * for equality comparisons. If `fromIndex` is negative, it's used as the offset
+ * from the end of `array`. If `array` is sorted providing `true` for `fromIndex`
+ * performs a faster binary search.
+ *
+ * @static
+ * @memberOf _
+ * @category Array
+ * @param {Array} array The array to search.
+ * @param {*} value The value to search for.
+ * @param {boolean|number} [fromIndex=0] The index to search from or `true`
+ *  to perform a binary search on a sorted array.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ * @example
+ *
+ * _.indexOf([1, 2, 1, 2], 2);
+ * // => 1
+ *
+ * // using `fromIndex`
+ * _.indexOf([1, 2, 1, 2], 2, 2);
+ * // => 3
+ *
+ * // performing a binary search
+ * _.indexOf([1, 1, 2, 2], 2, true);
+ * // => 2
+ */
+function indexOf(array, value, fromIndex) {
+  var length = array ? array.length : 0;
+  if (!length) {
+    return -1;
+  }
+  if (typeof fromIndex == 'number') {
+    fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex;
+  } else if (fromIndex) {
+    var index = binaryIndex(array, value);
+    if (index < length &&
+        (value === value ? (value === array[index]) : (array[index] !== array[index]))) {
+      return index;
+    }
+    return -1;
+  }
+  return baseIndexOf(array, value, fromIndex || 0);
+}
+
+module.exports = indexOf;