index.js
8.24 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
async function delay(timeSecond) {
return new Promise(resolve => {
setTimeout(() => {
resolve();
}, timeSecond * 1000);
});
}
exports.delay = delay;
function deepCopy(obj) {
return JSON.parse(JSON.stringify(obj));
}
exports.deepCopy = deepCopy;
function deepFreeze(obj) {
let propNames = Object.getOwnPropertyNames(obj);
propNames.forEach((name) => {
let prop = obj[name];
if (typeof prop == 'object' && prop !== null)
deepFreeze(prop);
});
return Object.freeze(obj);
}
exports.deepFreeze = deepFreeze;
// 这个函数实际上是Object.is()的polyfill
function is(x, y) {
if (x === y) {
return x !== 0 || y !== 0 || 1 / x === 1 / y;
}
else {
return x !== x && y !== y;
}
}
function shallowEqual(objA, objB) {
// 首先对基本数据类型的比较
if (is(objA, objB))
return true;
// 由于Obejct.is()可以对基本数据类型做一个精确的比较, 所以如果不等
// 只有一种情况是误判的,那就是object,所以在判断两个对象都不是object
// 之后,就可以返回false了
if (typeof objA !== 'object' || objA === null ||
typeof objB !== 'object' || objB === null) {
return false;
}
// 过滤掉基本数据类型之后,就是对对象的比较了
// 首先拿出key值,对key的长度进行对比
const keysA = Object.keys(objA);
const keysB = Object.keys(objB);
// 长度不等直接返回false
if (keysA.length !== keysB.length)
return false;
// key相等的情况下,在去循环比较
for (let i = 0; i < keysA.length; i++) {
// key值相等的时候
// 借用原型链上真正的 hasOwnProperty 方法,判断ObjB里面是否有A的key的key值
// 属性的顺序不影响结果也就是{name:'daisy', age:'24'} 跟{age:'24',name:'daisy' }是一样的
// 最后,对对象的value进行一个基本数据类型的比较,返回结果
if (!Object.prototype.hasOwnProperty.call(objB, keysA[i]) ||
!is(objA[keysA[i]], objB[keysA[i]])) {
return false;
}
}
return true;
}
exports.shallowEqual = shallowEqual;
function deepEqual(x, y) {
if (x === y) {
return true;
}
else if ((typeof x == "object" && x != null) && (typeof y == "object" && y != null)) {
if (Object.keys(x).length != Object.keys(y).length)
return false;
for (var prop in x) {
if (y.hasOwnProperty(prop)) {
if (!deepEqual(x[prop], y[prop]))
return false;
}
else
return false;
}
return true;
}
else
return false;
}
exports.deepEqual = deepEqual;
/**
* @param [wait] - A zero-or-greater delay in milliseconds. For event callbacks, values around 100 or 250 (or even higher) are most useful.
* @param [noTrailing] - Optional, defaults to false. If noTrailing is true, callback will only execute every `delay` milliseconds while the
* throttled-function is being called. If noTrailing is false or unspecified, callback will be executed one final time
* after the last throttled-function call. (After the throttled-function has not been called for `delay` milliseconds,
* the internal counter is reset).
*/
function throttle(func, wait = 100, immediate = false, noTrailing = false) {
let timeoutID;
let cancelled = false;
let lastExec = 0;
function clearExistingTimeout() {
if (timeoutID) {
clearTimeout(timeoutID);
timeoutID = undefined;
}
}
function cancel() {
clearExistingTimeout();
cancelled = true;
}
if (!noTrailing) {
}
let wrapper = function (...arguments_) {
let self = this;
let elapsed = lastExec ? Date.now() - lastExec : 0;
if (cancelled)
return;
function exec() {
lastExec = Date.now();
func.apply(self, arguments_);
}
function clear() {
timeoutID = undefined;
}
if (immediate) {
if (!timeoutID) {
exec();
timeoutID = setTimeout(clear, wait);
}
else {
clearExistingTimeout();
if (noTrailing) {
timeoutID = setTimeout(clear, wait - elapsed);
}
else {
timeoutID = setTimeout(() => { exec(); timeoutID = setTimeout(clear, wait); }, wait - elapsed);
}
}
}
else {
if (!timeoutID) {
lastExec = Date.now();
timeoutID = setTimeout(exec, wait);
}
else {
clearExistingTimeout();
timeoutID = setTimeout(exec, wait - elapsed);
}
}
};
wrapper.cancel = cancel;
return wrapper;
}
exports.throttle = throttle;
function debounce(func, wait = 100, immediate = false) {
let timer, args, context, timestamp, result;
function later() {
let last = Date.now() - timestamp;
if (last < wait && last >= 0) {
timer = setTimeout(later, wait - last);
}
else {
timer = null;
if (!immediate) {
result = func.apply(context, args);
context = args = null;
}
}
}
;
let debounced = function () {
context = this;
args = arguments;
timestamp = Date.now();
let callNow = immediate && !timer;
if (!timer)
timer = setTimeout(later, wait);
if (callNow) {
result = func.apply(context, args);
context = args = null;
}
return result;
};
debounced.clear = function () {
if (timer) {
clearTimeout(timer);
timer = null;
}
};
debounced.flush = function () {
if (timer) {
result = func.apply(context, args);
context = args = null;
clearTimeout(timer);
timer = null;
}
};
return debounced;
}
exports.debounce = debounce;
function uniqArray(array) {
let temp = [];
for (var i = 0; i < array.length; i++) {
if (temp.indexOf(array[i]) == -1) {
temp.push(array[i]);
}
}
return temp;
}
exports.uniqArray = uniqArray;
//合并两个对象到一起.
function assign(object, obj2) {
object = object || {};
if (!object.assign) {
Object.defineProperty(object, "assign", {
enumerable: false,
configurable: true,
writable: true,
value: function (target, firstSource) {
"use strict";
if (target === undefined || target === null)
throw new TypeError("Cannot convert first argument to object");
var to = Object(target);
for (var i = 1; i < arguments.length; i++) {
var nextSource = arguments[i];
if (nextSource === undefined || nextSource === null)
continue;
var keysArray = Object.keys(Object(nextSource));
for (var nextIndex = 0, len = keysArray.length; nextIndex < len; nextIndex++) {
var nextKey = keysArray[nextIndex];
var desc = Object.getOwnPropertyDescriptor(nextSource, nextKey);
if (desc !== undefined && desc.enumerable)
to[nextKey] = nextSource[nextKey];
}
}
return to;
}
});
}
if (!obj2) {
return object;
}
return object.assign(object, obj2);
}
exports.assign = assign;
//合并多个对象到一起.
function assignM(object, ...objs) {
console.log("合并对象:", objs);
let ret = object;
for (let i in objs) {
ret = assign(ret, objs[i]);
}
return ret;
}
exports.assignM = assignM;
function md5(str) {
return require("./Md5")(str);
}
exports.md5 = md5;