remove: map as sets

22-maps/02-english-dict-map-populate/main.go

@@ -0,0 +1,91 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	// #2A: Get the key from CLI
+	args := os.Args[1:]
+	if len(args) != 1 {
+		fmt.Println("[english word] -> [turkish word]")
+		return
+	}
+	query := args[0]
+
+	// #1: Empty Map Literal
+	// dict := map[string]string{}
+
+	// 3: Map Literal
+	dict := map[string]string{
+		"good":    "kötü",
+		"great":   "harika",
+		"perfect": "mükemmel",
+		// #4
+		// 42: "forty two",
+		// "forty two": 42,
+	}
+
+	dict["up"] = "yukarı"  // adds a new pair
+	dict["down"] = "aşağı" // adds a new pair
+	dict["good"] = "iyi"   // #5: overwrites the value at the key: "good"
+	dict["mistake"] = ""   // #8: a key with a zero-value
+
+	// #10: comma ok in a short if
+	if value, ok := dict[query]; ok {
+		fmt.Printf("%q means %#v\n", query, value)
+		return
+	}
+	fmt.Printf("%q not found.\n", query)
+
+	// fmt.Printf("Zero Value: %#v\n", dict)
+	fmt.Printf("# of Keys : %d\n", len(dict))
+
+	// #13: compare a map using its printed output
+	// copied := map[string]string{"up": "yukarı", "down": "aşağı",
+	// 	"mistake": "", "good": "iyi", "great": "harika",
+	// 	"perfect": "mükemmel"}
+
+	// first := fmt.Sprintf("%s", dict)
+	// second := fmt.Sprintf("%s", copied)
+
+	// if first == second {
+	// 	fmt.Println("Maps are equal")
+	// }
+
+	// #12: printing a map (ordered output since Go 1.12)
+	// fmt.Printf("%#v\n", dict)
+
+	// #11
+	// for k, v := range dict {
+	// 	fmt.Printf("%q means %#v\n", k, v)
+	// }
+
+	// #9: check for non-existing key: with comma, ok
+	// value, ok := dict[query]
+	// if !ok {
+	// 	fmt.Printf("%q not found.\n", query)
+	// }
+
+	// #7: check for non-existing key using zero-value
+	// if value == "" {
+	// 	fmt.Printf("%q not found.\n", query)
+	// }
+
+	// #6: getting values from a map using keys directly
+	// fmt.Println("good      -> ", dict["good"])
+	// fmt.Println("great     -> ", dict["great"])
+	// fmt.Println("perfect   -> ", dict["perfect"])
+
+	// #2B: retrieve values by key - O(1) efficiency
+	// value := dict[query]
+
+}