Merge branch '3.1-powerConsumptionInGolang' <Toy Project 3.1 >

Toy Project 3.1 >
    Rewrite Power Consumption Calculator in Golang
    Code Completed and get same result as Python version

    Need to make document for this project

powerConsumptionInGolang/.gitignore

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+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Pesonal use
+personal_use/
+
+# System and IDE setting files
+.idea
+.DS_Store

powerConsumptionInGolang/go.mod

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+module powerConsumptionInGolang
+
+go 1.19

powerConsumptionInGolang/main.go

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+/*
+< Code Writing Idea Flow >
+
+Plan (Try 1):
+	1. Make Three parts:
+		Data part,
+		Structure part,
+		Main part
+
+		1.1. Data part
+			Which type should I use for saving data
+			slice? or struct? or map?
+
+		1.2. Struct part
+			Make Two structs?
+				Make Device struct and inherit it to Electrics struct like a python class?
+
+		1.3. Main part
+			I Think if 1.1 and 1.2 are made well, it will be easy.
+			Just calculate and print it.
+
+Plan (Try 2):
+	2. I decided to make Struct part first and then make Data using Struct.
+
+Consequence:
+	3. I made Struct that abstracts ElectricDevice.
+		3.1. I made fields
+		3.2. But I failed to make methods that calculate daily, monthly, yearly power consumption. So I made methods outside of Struct.
+		3.3. If the function (e T) is defined outside of Struct, it looks like callable by T.method()
+
+	4. I made data slice of ElectricDevice in Data part.
+	5. I Calculated total daily, monthly, yearly power consumption in Main part.
+*/
+
+package main
+
+import "fmt"
+
+// Struct part =========================================================================================================
+
+// ElectricDevice Struct for electric device
+type ElectricDevice struct {
+	name           string
+	power          float64 // unit: watt
+	cnt            int     // unit: ea
+	dailyUsageTime int     // unit: hour
+
+}
+
+// dailyPowerConsumption unit: kWh
+func (e ElectricDevice) dailyPowerConsumption() float64 {
+	return e.power * float64(e.cnt) * float64(e.dailyUsageTime) / 1000
+}
+
+// monthlyPowerConsumption unit: kWh
+func (e ElectricDevice) monthlyPowerConsumption() float64 {
+	return e.dailyPowerConsumption() * 30
+}
+
+// yearlyPowerConsumption unit: kWh
+func (e ElectricDevice) yearlyPowerConsumption() float64 {
+	return e.dailyPowerConsumption() * 365
+}
+
+// Data part ===========================================================================================================
+var electricDevices = []ElectricDevice{
+	{name: "PLED", power: 20, cnt: 4, dailyUsageTime: 12},
+	{name: "Philips", power: 16, cnt: 4, dailyUsageTime: 12},
+	{name: "FarmTec", power: 12, cnt: 1, dailyUsageTime: 12},
+	{name: "LED_BAR", power: 7.2, cnt: 10, dailyUsageTime: 12},
+	{name: "Synology_NAS", power: 25, cnt: 1, dailyUsageTime: 24},
+}
+
+// Main part ===========================================================================================================
+func main() {
+
+	var (
+		totalDailyPowerConsumption   float64
+		totalMonthlyPowerConsumption float64
+		totalYearlyPowerConsumption  float64
+	)
+
+	for _, v := range electricDevices {
+		totalDailyPowerConsumption += v.dailyPowerConsumption()
+		totalMonthlyPowerConsumption += v.monthlyPowerConsumption()
+		totalYearlyPowerConsumption += v.yearlyPowerConsumption()
+	}
+
+	fmt.Println()
+	fmt.Printf("Total Daily Power Consumption: %.3f kWh\n", totalDailyPowerConsumption)
+	fmt.Printf("Total Monthly Power Consumption: %.3f kWh\n", totalMonthlyPowerConsumption)
+	fmt.Printf("Total Yearly Power Consumption: %.3f kWh\n", totalYearlyPowerConsumption)
+}