add: exercises and quiz for appending and slicing

16-slices/exercises/11-housing-prices/main.go

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+package main
+
+// ---------------------------------------------------------
+// EXERCISE: Housing Prices
+//
+//  We have received housing prices. Your task is to load the data into
+//  appropriately typed slices then print them.
+//
+//  1. Check out the expected output
+//
+//
+//  2. Check out the code below
+//
+//     1. header   : stores the column headers
+//     2. data     : stores the real data related to each column
+//     3. separator: you will use it to separate the data
+//
+//
+//  3. Parse the data
+//
+//     1. Separate it into rows by using the newline character ("\n")
+//
+//     2. For each row, separate it by using the separator (",")
+//
+//
+//  4. Load the data into distinct slices
+//
+//     1. Load the locations into a []string
+//     2. Load the sizes into []int
+//     3. Load the beds into []int
+//     4. Load the baths into []int
+//     5. Load the prices into []int
+//
+//
+//  5. Print the header
+//
+//     1. Separate it by using the separator
+//
+//     2. Print each column 15 character wide ("%-15s")
+//
+//
+//  6. Print the rows from the slices that you've created, line by line
+//
+//
+// EXPECTED OUTPUT
+//
+//  Location       Size           Beds           Baths          Price
+//  ===========================================================================
+//  New York       100            2              1              100000
+//  New York       150            3              2              200000
+//  Paris          200            4              3              400000
+//  Istanbul       500            10             5              1000000
+//
+//
+// HINTS
+//
+//  + strings.Split function can separate a string into a []string
+//
+// ---------------------------------------------------------
+
+func main() {
+	const (
+		header = "Location,Size,Beds,Baths,Price"
+		data   = `New York,100,2,1,100000
+New York,150,3,2,200000
+Paris,200,4,3,400000
+Istanbul,500,10,5,1000000`
+
+		separator = ","
+	)
+}

16-slices/exercises/11-housing-prices/solution/main.go

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+// 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"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	const (
+		header = "Location,Size,Beds,Baths,Price"
+		data   = `New York,100,2,1,100000
+New York,150,3,2,200000
+Paris,200,4,3,400000
+Istanbul,500,10,5,1000000`
+
+		separator = ","
+	)
+
+	var (
+		locs                       []string
+		sizes, beds, baths, prices []int
+	)
+
+	rows := strings.Split(data, "\n")
+
+	for _, row := range rows {
+		cols := strings.Split(row, separator)
+
+		locs = append(locs, cols[0])
+
+		n, _ := strconv.Atoi(cols[1])
+		sizes = append(sizes, n)
+
+		n, _ = strconv.Atoi(cols[2])
+		beds = append(beds, n)
+
+		n, _ = strconv.Atoi(cols[3])
+		baths = append(baths, n)
+
+		n, _ = strconv.Atoi(cols[4])
+		prices = append(prices, n)
+	}
+
+	for _, h := range strings.Split(header, separator) {
+		fmt.Printf("%-15s", h)
+	}
+	fmt.Printf("\n%s\n", strings.Repeat("=", 75))
+
+	for i := range rows {
+		fmt.Printf("%-15s", locs[i])
+		fmt.Printf("%-15d", sizes[i])
+		fmt.Printf("%-15d", beds[i])
+		fmt.Printf("%-15d", baths[i])
+		fmt.Printf("%-15d", prices[i])
+		fmt.Println()
+	}
+}