53 lines
1.1 KiB
Go
53 lines
1.1 KiB
Go
// For more tutorials: https://blog.learngoprogramming.com
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//
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// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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package main
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import "fmt"
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type filterFunc func(int) bool
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func main() {
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signatures()
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funcValues()
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}
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func isEven(n int) bool {
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return n%2 == 0
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}
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func isOdd(m int) bool {
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return m%2 == 1
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}
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func signatures() {
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fmt.Println("••• FUNC SIGNATURES (TYPES) •••")
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fmt.Printf("isEven : %T\n", isEven)
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fmt.Printf("isOdd : %T\n", isOdd)
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}
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func funcValues() {
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fmt.Println("\n••• FUNC VALUES (VARS) •••")
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// var value func(int) bool
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var value filterFunc
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fmt.Printf("value nil? : %t\n", value == nil)
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value = isEven
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fmt.Printf("value(2) : %t\n", value(2))
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fmt.Printf("isEven(2) : %t\n", isEven(2))
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value = isOdd
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fmt.Printf("value(1) : %t\n", value(1))
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fmt.Printf("isOdd(1) : %t\n", isOdd(1))
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fmt.Printf("value nil? : %t\n", value == nil)
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fmt.Printf("value : %p\n", value)
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fmt.Printf("isEven : %p\n", isEven)
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fmt.Printf("isOdd : %p\n", isOdd)
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}
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