react app

react-app/node_modules/lodash/internal/baseUniq.js

@@ -0,0 +1,60 @@
+var baseIndexOf = require('./baseIndexOf'),
+    cacheIndexOf = require('./cacheIndexOf'),
+    createCache = require('./createCache');
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/**
+ * The base implementation of `_.uniq` without support for callback shorthands
+ * and `this` binding.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {Function} [iteratee] The function invoked per iteration.
+ * @returns {Array} Returns the new duplicate free array.
+ */
+function baseUniq(array, iteratee) {
+  var index = -1,
+      indexOf = baseIndexOf,
+      length = array.length,
+      isCommon = true,
+      isLarge = isCommon && length >= LARGE_ARRAY_SIZE,
+      seen = isLarge ? createCache() : null,
+      result = [];
+
+  if (seen) {
+    indexOf = cacheIndexOf;
+    isCommon = false;
+  } else {
+    isLarge = false;
+    seen = iteratee ? [] : result;
+  }
+  outer:
+  while (++index < length) {
+    var value = array[index],
+        computed = iteratee ? iteratee(value, index, array) : value;
+
+    if (isCommon && value === value) {
+      var seenIndex = seen.length;
+      while (seenIndex--) {
+        if (seen[seenIndex] === computed) {
+          continue outer;
+        }
+      }
+      if (iteratee) {
+        seen.push(computed);
+      }
+      result.push(value);
+    }
+    else if (indexOf(seen, computed, 0) < 0) {
+      if (iteratee || isLarge) {
+        seen.push(computed);
+      }
+      result.push(value);
+    }
+  }
+  return result;
+}
+
+module.exports = baseUniq;