-
Notifications
You must be signed in to change notification settings - Fork 7
/
UpFun.kt
197 lines (168 loc) · 4.06 KB
/
UpFun.kt
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
package com.fish.kotlindemo.funclass
import com.fish.kotlindemo.varclass.name
import com.fish.kotlindemo.varclass.test
import kotlinx.coroutines.Delay
import kotlin.concurrent.thread
fun upFun1(name: String, age: Int): Float {
return 88f
}
//赋值
//var varFun:(name: String, age: Int)->Float = ::upFun1
var varFun = ::upFun1
//testUpFun1 接收的参数为函数类型:(String, Int)->String
fun testUpFun1(getScore: (String, Int) -> Float) {
var score = getScore("fish", 18)
println("student score:$score")
}
//匿名函数
//var varFun1:(String, Int)->Float = fun (name: String, age: Int):Float {
// return 88f
//}
//类型推断
var varFun1 = fun(name: String, age: Int): Float {
return 88f
}
//Lambda 表达式
//var lambda1:(String, Int)->Float = {
// name:String,age:Int->
// 88f
//}
var lambda1 = { name: String, age: Int ->
88f
}
//定义匿名函数
var anoymous1: (String, Int) -> Float = fun(name: String, age: Int): Float {
println("name:$name age:$age")
return 88f
}
//自动推导,消除变量类型
var anoymous2 = fun(name: String, age: Int): Float {
println("name:$name age:$age")
return 88f
}
//传入匿名函数
fun main0(args: Array<String>) {
//传入匿名函数
testUpFun1(fun(name: String, age: Int): Float {
println("name:$name age:$age")
return 88f
})
testUpFun1(anoymous1)
testUpFun1(anoymous2)
}
fun testUpFun2(getScore: (String, Int) -> Float, needDelay: Boolean) {
if (needDelay)
println("delay...")
var score = getScore("fish", 18)
println("student score:$score")
}
fun main1(args: Array<String>) {
//传入Lambda
testUpFun1 { name: String, age: Int ->
88f
}
//传入匿名函数
testUpFun1({ name: String, age: Int ->
println("name:$name age:$age")
88f
}
)
}
//完整写法
var varLambda1: (String, Int) -> Float = { name: String, age: Int ->
println("student name:$name age:$age")
88f
}
//var varLambda1 = { name: String, age: Int ->
// println("student name:$name age:$age")
// 88f
//}
//
//var varLambda1: (String, Int) -> Float = { name, age ->
// println("student name:$name age:$age")
// 88f
//}
var varLambda2 = { name: String, int: Int ->
println()
test()
"jj"
}
fun testUpFun3(needDelay: Boolean, getScore: (String, Int) -> Float) {
if (needDelay)
println("delay...")
var score = getScore("fish", 18)
println("student score:$score")
}
fun testUpFun4(getScore: (String, Int) -> Float) {
var score = getScore("fish", 18)
println("student score:$score")
}
fun testUpFun5(getScore: (String) -> Float) {
var score = getScore("fish")
println("student score:$score")
}
//无参数
fun testUpFun6(getScore: () -> Float) {
var score = getScore()
println("student score:$score")
}
fun testUpFun7(getScore: (String) -> Unit): (Boolean, Int) -> String {
//调用函数
var score = getScore("fish")
println("student score:$score")
//返回函数,Lambda表示
return { need: Boolean, age: Int ->
println("need:$need age:$age")
"fish"
}
}
fun main2(args: Array<String>) {
testUpFun2({ name: String, age: Int ->
println("name:$name age:$age")
88f
}, true
)
}
fun main3(args: Array<String>) {
testUpFun3(true
) { name: String, age: Int ->
println("name:$name age:$age")
88f
}
}
fun main4(args: Array<String>) {
////省略"()"
testUpFun4 { name: String, age: Int ->
println("name:$name age:$age")
88f
}
}
//fun main5(args: Array<String>) {
// ////省略"()"
// testUpFun5 { name: String ->
// println("name:$name")
// 88f
// }
//}
fun main5(args: Array<String>) {
////省略"()"
testUpFun5 {
println("name:$it")
88f
}
}
fun main6(args: Array<String>) {
////省略"()"
testUpFun6 {
println("name")
88f
}
}
fun main7(args: Array<String>) {
////省略"()"
var testReturn = testUpFun7 {
println("name:")
77f
}
testReturn(true, 5)
}