fix eslint

Author: yyx990803

src/directives/model/select.js

@@ -193,7 +193,6 @@ function checkInitialValue () {
  */
 
 function getValue (el, multi) {
-  var i = el.options.length
   var res = multi ? [] : null
   var op, val
   for (var i = 0, l = el.options.length; i < l; i++) {
@@ -237,5 +236,7 @@ function indexOf (arr, val) {
  */
 
 function equals (a, b) {
+  /* eslint-disable eqeqeq */
   return a == b || JSON.stringify(a) == JSON.stringify(b)
+  /* eslint-enable eqeqeq */
 }

src/observer/index.js

@@ -78,11 +78,8 @@ Observer.create = function (value, vm) {
 Observer.prototype.walk = function (obj) {
   var keys = Object.keys(obj)
   var i = keys.length
-  var key, prefix
   while (i--) {
-    key = keys[i]
-    prefix = key.charCodeAt(0)
-    this.convert(key, obj[key])
+    this.convert(keys[i], obj[keys[i]])
   }
 }