Exercises & activities from the go workshop provided by Packt: https://courses.packtpub.com/courses/go
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51 lines
867 B
51 lines
867 B
package main
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import "fmt"
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const GlobalLimit = 100
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const MaxCacheSize = 10 * GlobalLimit
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const (
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CacheKeyBook = "book_"
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CacheKeyCD = "cd_"
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)
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var cache map[string]string
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func cacheGet(key string) string {
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return cache[key]
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}
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func cacheSet(key, val string) {
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if len(cache)+1 >= MaxCacheSize {
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return
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}
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cache[key] = val
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}
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func getBook(isbn string) string {
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return cacheGet(CacheKeyBook + isbn)
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}
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func setBook(isbn, name string) {
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cacheSet(CacheKeyBook+isbn, name)
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}
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func getCD(sku string) string {
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return cacheGet(CacheKeyCD + sku)
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}
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func setCD(sku, title string) {
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cacheSet(CacheKeyCD+sku, title)
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}
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func main() {
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cache = make(map[string]string)
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setBook("1234-5678", "Get ready to Go")
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setCD("1234-5678", "Get ready to Go audio book")
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fmt.Println("Book:", getBook("1234-5678"))
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fmt.Println("CD :", getCD("1234-5678"))
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}
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