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
// lodash
var _ = require('lodash')
console.log(_.now())
//判断字符串是否以xx开头 & _.endWith
print(_.startsWith("hahah","ha"))
// 截取指定长度后加。。。
print(_.truncate("adadada,sdadergegegwewrwerwr",{
length: 10,
separator: /,? +/
}))
// 模板字符串
var name = "haha"
print(_.template('你好！${name}')())
// obj合并 es6的object.assign 后来的会覆盖前面的
var obj1 = {name:"小白",age:18}
var obj2 = {age:10,color:"red"}
console.log(_.assign(obj1,obj2))
// _.findKey
var obj3 = {
joy: {age: 18},
tom: {age: 7},
kk: {age: 25},
alll: {age: 38}
}
var res = _.findKey(obj3, function(n){
return n.age < 20
})
console.log(res)
// mapKeys and mapvalue
var obj4 = {
'a1': '1',
'a2': '2',
'a3': '3'
}
var obj5 = _.mapKeys(obj4,function(v,k){
console.log(v, k)
return 'b' + k.slice(1)
})
console.log(obj5)
var obj6 = _.mapValues(obj4,function(v){
console.log(v)
return v*10
})
console.log(obj6)
// 反转映射
var obj7 = {
v1: "as",
v2: "gwew",
v3: {asd:'asda'},
v14: "als"
}
var obj8 = _.invert(obj7)
console.log(obj8);
// uniq去重
var arr1 = [21,12,32,3465,456,3,1,1,1,1]
console.log(_.uniq(arr1))