change hashCode algorithm

Author: Ken Berkeley

dist/min.css

@@ -47,14 +47,8 @@
 import ColumnGroup from './ColumnGroup.vue'
 import replaceWith from 'replace-with'
 import groupBy from 'lodash/groupBy'
-const LS = localStorage
-const parseStr = JSON.parse
-const stringify = JSON.stringify
-const rmFromLS = k => LS.removeItem(k)
-const saveToLS = (k, v) => LS.setItem(k, stringify(v))
-const getFromLS = k => { try { return parseStr(LS.getItem(k)) } catch (e) { rmFromLS(k) } }
-const hash = s => '' + s.split('').reduce((a, b) => (a = (a << 5) - a + b.charCodeAt(0), a & a), 0)
-// the hash algorithm above refers to http://stackoverflow.com/a/15710692/5172890
+import keyGen from '../_utils/keyGen'
+import { parseStr, stringify, saveToLS, rmFromLS, getFromLS } from '../_utils/localstorage'
 
 export default {
   name: 'HeaderSettings',
@@ -69,7 +63,7 @@ export default {
       origSettings,
       usingBak: false, // is using backup
       processingCls: '',
-      storageKey: this.supportBackup && hash(origSettings)
+      storageKey: this.supportBackup && keyGen(origSettings)
     }
   },
   created () {

dist/min.js

@@ -0,0 +1,9 @@
+// https://stackoverflow.com/a/7616484/5172890
+export default function (s) {
+  let hash = 0
+  for (let i = 0; i < s.length; i++) {
+    hash = ((hash << 5) - hash) + s.charCodeAt(i)
+    hash |= 0
+  }
+  return hash
+}

src/HeaderSettings/index.vue

@@ -0,0 +1,21 @@
+const LS = localStorage
+
+export const parseStr = JSON.parse
+
+export const stringify = JSON.stringify
+
+export const saveToLS = (k, v) => {
+  LS.setItem(k, stringify(v))
+}
+
+export const rmFromLS = k => {
+  LS.removeItem(k)
+}
+
+export const getFromLS = k => {
+  try {
+    return parseStr(LS.getItem(k))
+  } catch (e) {
+    rmFromLS(k)
+  }
+}