Bump to v3.0.0.

internal/createExtremum.js

@@ -0,0 +1,38 @@
+import baseCallback from './baseCallback';
+import charAtCallback from './charAtCallback';
+import extremumBy from './extremumBy';
+import isArray from '../lang/isArray';
+import isIterateeCall from './isIterateeCall';
+import isString from '../lang/isString';
+import toIterable from './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);
+  };
+}
+
+export default createExtremum;