Bump to v3.0.0.

internal/createExtremum.js

@@ -0,0 +1,38 @@
+var baseCallback = require('./baseCallback'),
+    charAtCallback = require('./charAtCallback'),
+    extremumBy = require('./extremumBy'),
+    isArray = require('../lang/isArray'),
+    isIterateeCall = require('./isIterateeCall'),
+    isString = require('../lang/isString'),
+    toIterable = require('./toIterable');
+
+/**
+ * Creates a function that gets the extremum value of a collection.
+ *
+ * @private
+ * @param {Function} arrayFunc The function to get the extremum value from an array.
+ * @param {boolean} [isMin] Specify returning the minimum, instead of the maximum,
+ *  extremum value.
+ * @returns {Function} Returns the new extremum function.
+ */
+function createExtremum(arrayFunc, isMin) {
+  return function(collection, iteratee, thisArg) {
+    if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+      iteratee = null;
+    }
+    var noIteratee = iteratee == null;
+
+    iteratee = noIteratee ? iteratee : baseCallback(iteratee, thisArg, 3);
+    if (noIteratee) {
+      var isArr = isArray(collection);
+      if (!isArr && isString(collection)) {
+        iteratee = charAtCallback;
+      } else {
+        return arrayFunc(isArr ? collection : toIterable(collection));
+      }
+    }
+    return extremumBy(collection, iteratee, isMin);
+  };
+}
+
+module.exports = createExtremum;