index是什么意思
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发布时间：2022-04-09 11:57
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懂视网
时间：2022-04-09 16:18
angular.module(‘indexdb‘, [])
2 .factory(‘IndexdbJs‘, [‘$ionicPopup‘,function ($ionicPopup) {
3
4 window.indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB;
5 window.IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction;
6 window.IDBKeyRange = window.IDBKeyRange || window.webkitIDBKeyRange || window.msIDBKeyRange;
7 window.IDBCursor=window.IDBCursor||window.webkitIDBCursor|| window.msIDBCursor;
8 var db={
9 dbName: ‘aptdb‘,
10 dbVersion: 2046, //用小数会四舍五入
11 dbInstance: {},
12
13 errorHandler: function (error) {
14 console.log(‘error: ‘ + error.target.error.message);
15 },
16
17 open: function (func,fail) {
18 var dbContent = window.indexedDB.open(db.dbName, db.dbVersion);
19 dbContent.onupgradeneeded = db.upgrade;
20 dbContent.onerror = db.errorHandler;
21 dbContent.onsuccess = function (e) {
22 db.dbInstance = dbContent.result;
23 db.dbInstance.onerror = fail;
24 func();
25 };
26 },
27 upgrade: function (e) {
28 var _db = e.target.result, names = _db.objectStoreNames;
29 // 此处可以创建多个表
30 var name = "cart";
31 if (!names.contains(name)) {
32 _db.createObjectStore(
33 name,
34 {
35 keyPath: ‘goodsId‘,
36 autoIncrement:false
37 });
38 }
39 },
40 getObjectStore: function (objectStoreName,mode) {
41 var txn, store;mode = mode || ‘readonly‘;
42 txn = db.dbInstance.transaction([objectStoreName], mode);
43 store = txn.objectStore(objectStoreName);
44 return store;
45 },
46 add: function (objectStoreName,data,success,fail) {
47 db.open(function () {
48 var store, req, mode = ‘readwrite‘;
49 store = db.getObjectStore(objectStoreName,mode),
50 req = store.add(data);
51 req.onsuccess = success;
52 req.onerror=fail;
53 },fail);
54 },
55 update: function (objectStoreName,data,success,fail) {
56 db.open(function () {
57 var store, req, mode = ‘readwrite‘;
58 store = db.getObjectStore(objectStoreName,mode),
59 req = store.put(data);
60 req.onsuccess = success;
61 req.onerror=fail;
62 },fail);
63 },
64 getAll: function (objectStoreName,success,fail) {
65
66 db.open(function () {
67 var
68 store = db.getObjectStore(objectStoreName),
69 cursor = store.openCursor(),
70 data = [];
71
72 cursor.onsuccess = function (e) {
73 var result = e.target.result;
74 if (result && result !== null) {
75 data.push(result.value);
76 result.continue();
77 } else {
78 success(data);
79 }
80 };
81 cursor.onerror=fail;
82
83 },fail);
84 },
85 get: function (id,objectStoreName,success,fail) {
86 db.open(function () {
87 var
88 store = db.getObjectStore(objectStoreName),
89 req = store.get(id);
90 req.onsuccess = function (e){
91 success(e.target.result);
92 };
93 req.onerror=fail;
94 });
95 },
96 // delete是保留字
97 ‘delete‘: function (id,objectStoreName,success,fail) {
98 db.open(function () {
99 var
100 mode = ‘readwrite‘,
101 store, req;
102 store = db.getObjectStore(objectStoreName,mode);
103 req = store.delete(id);
104 req.onsuccess = success;
105 req.onerror=fail;
106 });
107 },
108 deleteAll: function (objectStoreName,success,fail) {
109 db.open(function () {
110 var mode, store, req;
111 mode = ‘readwrite‘;
112 store = db.getObjectStore(objectStoreName,mode);
113 req = store.clear();
114 req.onsuccess = success;
115 req.onerror=fail;
116 });
117 }
118 };
119
120 return db;
121 }]);
View Code
IndexedDB通用功能封装成angular服务
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热心网友
时间：2022-04-09 13:26
index
[英][ˈɪndeks][美][ˈɪnˌdɛks]
n.索引; <数>指数; 指示; 标志;
vt.给…编索引; 把…编入索引; [经济学]按生活指数调整（工资、价格等）;
vi.[机械学]转位;
第三人称单数：indexes过去分词：indexed复数：indicesindexes现在进行时：indexing过去式：indexed
以上结果来自金山词霸
例句:
1.
Index funds make up 28% of instry assets.
指数基金占到行业资产的28%。
热心网友
时间：2022-04-09 14:44
n.1.索引 2.标志 3.指数，率
热心网友
时间：2022-04-09 16:19
“指数”的意思。是个名词。
热心网友
时间：2022-04-09 18:10
index在不同词性下意义不同：
n：索引; <数>指数; 指示; 标志;
vt：给…编索引; 把…编入索引; [经济学]按生活指数调整（工资、价格等）;
vi：[机械学]转位;
index的第三人称单数：indexes
index的复数：indicesindexes
index的现在进行时：indexing
index的过去式：indexed
index的过去分词：indexed
