Use toKey in more functions.

lodash.js

@@ -2662,7 +2662,7 @@
           length = path.length;
 
       while (object != null && index < length) {
-        object = object[path[index++]];
+        object = object[toKey(path[index++])];
       }
       return (index && index == length) ? object : undefined;
     }
@@ -2835,7 +2835,7 @@
         object = parent(object, path);
         path = last(path);
       }
-      var func = object == null ? object : object[path];
+      var func = object == null ? object : object[toKey(path)];
       return func == null ? undefined : apply(func, object, args);
     }
 
@@ -3095,7 +3095,7 @@
      */
     function baseMatchesProperty(path, srcValue) {
       if (isKey(path) && isStrictComparable(srcValue)) {
-        return matchesStrictComparable(path, srcValue);
+        return matchesStrictComparable(toKey(path), srcValue);
       }
       return function(object) {
         var objValue = get(object, path);
@@ -3309,6 +3309,7 @@
      * @returns {Function} Returns the new function.
      */
     function baseProperty(key) {
+      key = toKey(key);
       return function(object) {
         return object == null ? undefined : object[key];
       };
@@ -3387,11 +3388,11 @@
                 object = parent(array, path);
 
             if (object != null) {
-              delete object[last(path)];
+              delete object[toKey(last(path))];
             }
           }
           else {
-            delete array[index];
+            delete array[toKey(index)];
           }
         }
       }
@@ -3481,7 +3482,7 @@
           nested = object;
 
       while (nested != null && ++index < length) {
-        var key = path[index];
+        var key = toKey(path[index]);
         if (isObject(nested)) {
           var newValue = value;
           if (index != lastIndex) {
@@ -3709,7 +3710,7 @@
 
     /**
      * The base implementation of `_.toString` which doesn't convert nullish
-     * values to empty strings or preserve the sign of `-0`.
+     * values to empty strings.
      *
      * @private
      * @param {*} value The value to process.
@@ -3723,7 +3724,8 @@
       if (isSymbol(value)) {
         return symbolToString ? symbolToString.call(value) : '';
       }
-      return (value + '');
+      var result = (value + '');
+      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
     }
 
     /**
@@ -3797,8 +3799,9 @@
     function baseUnset(object, path) {
       path = isKey(path, object) ? [path] : castPath(path);
       object = parent(object, path);
-      var key = last(path);
-      return (object != null && has(object, key)) ? delete object[key] : true;
+
+      var key = toKey(last(path));
+      return !(object != null && baseHas(object, key)) || delete object[key];
     }
 
     /**
@@ -5463,7 +5466,7 @@
           length = path.length;
 
       while (++index < length) {
-        var key = path[index];
+        var key = toKey(path[index]);
         if (!(result = object != null && hasFunc(object, key))) {
           break;
         }
@@ -5921,7 +5924,11 @@
      * @returns {string|symbol} Returns the key.
      */
     function toKey(value) {
-      return (typeof value == 'string' || isSymbol(value)) ? value : (value + '');
+      if (typeof value == 'string' || isSymbol(value)) {
+        return value;
+      }
+      var result = (value + '');
+      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
     }
 
     /**
@@ -11717,11 +11724,7 @@
      * // => '1,2,3'
      */
     function toString(value) {
-      if (value == null) {
-        return '';
-      }
-      var result = baseToString(value);
-      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+      return value == null ? '' : baseToString(value);
     }
 
     /*------------------------------------------------------------------------*/
@@ -12730,7 +12733,7 @@
      * // => { 'a': 1, 'c': 3 }
      */
     var pick = rest(function(object, props) {
-      return object == null ? {} : basePick(object, baseFlatten(props, 1));
+      return object == null ? {} : basePick(object, arrayMap(baseFlatten(props, 1), toKey));
     });
 
     /**
@@ -12797,7 +12800,7 @@
         length = 1;
       }
       while (++index < length) {
-        var value = object == null ? undefined : object[path[index]];
+        var value = object == null ? undefined : object[toKey(path[index])];
         if (value === undefined) {
           index = length;
           value = defaultValue;
@@ -14447,6 +14450,7 @@
      */
     var bindAll = rest(function(object, methodNames) {
       arrayEach(baseFlatten(methodNames, 1), function(key) {
+        key = toKey(key);
         object[key] = bind(object[key], object);
       });
       return object;