From 6d9a7b168cf72ab92ec9232a98e57170c4f619c3 Mon Sep 17 00:00:00 2001
From: Jon Calhoun <joncalhoun@gmail.com>
Date: Fri, 13 Oct 2017 12:42:53 -0400
Subject: [PATCH 1/4] Finished p1
---
main.go | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++
problems.csv | 12 +----------
2 files changed, 59 insertions(+), 11 deletions(-)
create mode 100644 main.go
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..1a735a5
--- /dev/null
+++ b/main.go
@@ -0,0 +1,58 @@
+package main
+
+import (
+ "encoding/csv"
+ "flag"
+ "fmt"
+ "os"
+ "strings"
+)
+
+func main() {
+ csvFilename := flag.String("csv", "problems.csv", "a csv file in the format of 'question,answer'")
+ flag.Parse()
+
+ file, err := os.Open(*csvFilename)
+ if err != nil {
+ exit(fmt.Sprintf("Failed to open the CSV file: %s\n", *csvFilename))
+ }
+ r := csv.NewReader(file)
+ lines, err := r.ReadAll()
+ if err != nil {
+ exit("Failed to parse the provided CSV file.")
+ }
+ problems := parseLines(lines)
+
+ correct := 0
+ for i, p := range problems {
+ fmt.Printf("Problem #%d: %s = \n", i+1, p.q)
+ var answer string
+ fmt.Scanf("%s\n", &answer)
+ if answer == p.a {
+ correct++
+ }
+ }
+
+ fmt.Printf("You scored %d out of %d.\n", correct, len(problems))
+}
+
+func parseLines(lines [][]string) []problem {
+ ret := make([]problem, len(lines))
+ for i, line := range lines {
+ ret[i] = problem{
+ q: line[0],
+ a: strings.TrimSpace(line[1]),
+ }
+ }
+ return ret
+}
+
+type problem struct {
+ q string
+ a string
+}
+
+func exit(msg string) {
+ fmt.Println(msg)
+ os.Exit(1)
+}
diff --git a/problems.csv b/problems.csv
index 11506cb..610d2e0 100644
--- a/problems.csv
+++ b/problems.csv
@@ -1,12 +1,2 @@
-5+5,10
+5+5, 10
1+1,2
-8+3,11
-1+2,3
-8+6,14
-3+1,4
-1+4,5
-5+1,6
-2+3,5
-3+3,6
-2+4,6
-5+2,7
From f78e310604a640f8a16078925cffa8bbe514252d Mon Sep 17 00:00:00 2001
From: Jon Calhoun <joncalhoun@gmail.com>
Date: Fri, 13 Oct 2017 15:24:41 -0400
Subject: [PATCH 2/4] Finished Part 2
---
main.go | 26 +++++++++++++++++++++-----
problems.csv | 12 +++++++++++-
2 files changed, 32 insertions(+), 6 deletions(-)
diff --git a/main.go b/main.go
index 1a735a5..1d58f43 100644
--- a/main.go
+++ b/main.go
@@ -6,10 +6,12 @@ import (
"fmt"
"os"
"strings"
+ "time"
)
func main() {
csvFilename := flag.String("csv", "problems.csv", "a csv file in the format of 'question,answer'")
+ timeLimit := flag.Int("limit", 30, "the time limit for the quiz in seconds")
flag.Parse()
file, err := os.Open(*csvFilename)
@@ -23,13 +25,27 @@ func main() {
}
problems := parseLines(lines)
+ timer := time.NewTimer(time.Duration(*timeLimit) * time.Second)
correct := 0
+
+problemloop:
for i, p := range problems {
- fmt.Printf("Problem #%d: %s = \n", i+1, p.q)
- var answer string
- fmt.Scanf("%s\n", &answer)
- if answer == p.a {
- correct++
+ fmt.Printf("Problem #%d: %s = ", i+1, p.q)
+ answerCh := make(chan string)
+ go func() {
+ var answer string
+ fmt.Scanf("%s\n", &answer)
+ answerCh <- answer
+ }()
+
+ select {
+ case <-timer.C:
+ fmt.Println()
+ break problemloop
+ case answer := <-answerCh:
+ if answer == p.a {
+ correct++
+ }
}
}
diff --git a/problems.csv b/problems.csv
index 610d2e0..11506cb 100644
--- a/problems.csv
+++ b/problems.csv
@@ -1,2 +1,12 @@
-5+5, 10
+5+5,10
1+1,2
+8+3,11
+1+2,3
+8+6,14
+3+1,4
+1+4,5
+5+1,6
+2+3,5
+3+3,6
+2+4,6
+5+2,7
From c7609c1e50f86f450bd69551dbf8109b07026419 Mon Sep 17 00:00:00 2001
From: Jon Calhoun <joncalhoun@gmail.com>
Date: Fri, 13 Oct 2017 15:25:18 -0400
Subject: [PATCH 3/4] Reverting the problems csv
---
problems.csv | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/problems.csv b/problems.csv
index 610d2e0..11506cb 100644
--- a/problems.csv
+++ b/problems.csv
@@ -1,2 +1,12 @@
-5+5, 10
+5+5,10
1+1,2
+8+3,11
+1+2,3
+8+6,14
+3+1,4
+1+4,5
+5+1,6
+2+3,5
+3+3,6
+2+4,6
+5+2,7
From 3b2250f3d56e07dd320f5c6272febe7827988d3e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sin=C3=A9sio=20Neto?= <sinetoami@gmail.com>
Date: Mon, 22 Jul 2019 10:13:02 -0300
Subject: [PATCH 4/4] add sinetoami's solution for Part 2 (#44)
---
students/sinetoami/main.go | 85 ++++++++++++++++++++++++++++++++++++++
1 file changed, 85 insertions(+)
create mode 100644 students/sinetoami/main.go
diff --git a/students/sinetoami/main.go b/students/sinetoami/main.go
new file mode 100644
index 0000000..575abb1
--- /dev/null
+++ b/students/sinetoami/main.go
@@ -0,0 +1,85 @@
+// Package main provides a command that starts a quiz based on a CSV file.
+package main
+
+import (
+ "encoding/csv"
+ "flag"
+ "fmt"
+ "math/rand"
+ "os"
+ "sort"
+ "strings"
+ "time"
+)
+
+// Problem represents a quis' problem structure.
+type Problem struct {
+ question, answer string
+}
+
+// QuizProblems stores each problem from a given CSV file to a variable.
+// If the shuffle flag is true will randomize the problems order.
+func QuizProblems(lines [][]string, shuffle bool) []Problem {
+ problems := make([]Problem, len(lines))
+ rand.Seed(time.Now().UTC().UnixNano())
+
+ // create a list with random items (int)
+ perm := rand.Perm(len(lines))
+
+ if !shuffle {
+ sort.Ints(perm[:])
+ }
+
+ for i, v := range perm {
+ problems[v] = Problem{lines[i][0], lines[i][1]}
+ }
+
+ return problems
+}
+
+func main() {
+ filename := flag.String("csv", "problems.csv", "a csv file in the format of 'question,answer' (default \"problems.csv\")")
+ limit := flag.Int("limit", 30, "the time limit for the quiz in seconds (default 30)")
+ shuffle := flag.Bool("shuffle", false, "shuffle the quiz order each time it is run if pass value 'true' (default false)")
+ flag.Parse()
+
+ file, err := os.Open(*filename)
+ if err != nil {
+ fmt.Errorf("failed to open CSV file: %v", err)
+ }
+ defer file.Close()
+
+ lines, err := csv.NewReader(file).ReadAll()
+ if err != nil {
+ fmt.Errorf("filed to read lines from file: %v", err)
+ }
+
+ score := 0
+ timer := time.NewTimer(time.Duration(*limit) * time.Second)
+ problems := QuizProblems(lines, *shuffle)
+
+quizloop:
+ for i, problem := range problems {
+ fmt.Printf("Problem #%d: %s = \n", i+1, problem.question)
+
+ // if the user don't type the answer before the timer is done
+ // will terminate the quiz.
+ answerChan := make(chan string)
+ go func() {
+ userAnswer := ""
+ fmt.Scanf("%s\n", &userAnswer)
+ answerChan <- strings.TrimSpace(userAnswer)
+ }()
+
+ select {
+ case an := <-answerChan:
+ if an == problem.answer {
+ score++
+ }
+ case <-timer.C:
+ break quizloop
+ }
+ }
+
+ fmt.Printf("You scored %d out of %d.", score, len(problems))
+}