TextScanner

Description

Golang-Based Program for counting the number of words within a string, all based on user input.

Motivation

This program has been created for testing a different approach towards learning Golang: following the 'Question Driven Development' that aims towards learning thigs by doing.

Concept

Create an infinite shell until user has written "exit" on console:
1. Let user enter a string or paragraph
2. Let user search for a particular word that they want to find word count of
3. Print the number of times a word was mentioned in the entered string

How to do it?

Creating Shell - Can be done with a for loop Scanning for input - Can be done with fmt.Scanln Scanning for word-to-search - Can be done with fmt.Scanln Finding word-count - For-Loop to range over the user input

1. Let User Enter & Search String Faced problem with scanner:

	fmt.Println("\nPlease enter the string!")
	fmt.Scanln("%s", &input)

• Program would end without taking user-input
• Input not taken by fmt.Scanf or fmt.Scanln
• Solved: fmt Scan family scan space-separated tokens. Instead of %s (string), use %q (quoted string) )and enter string within "quotes"

Instead we could have used bufio to provide a temporary storage:

        scanner := bufio.NewScanner(os.Stdin)
	input = scanner.Text()
	scanner.Scan()
	input = scanner.Text()
	fmt.Printf("The enter input is: %s\n", input)

• Buffered vs unbuffered IO
• Table Difference
• Stop being distracted by theory all the time - Try to finish using whatever method you already know

2. Range over input and scan how many times specific word mentioned
   • Referred to this guide
   • Basic blueprint:

	wordCount := 0
	for _, singleInput := range splitInput {
		if word == singleInput {
			wordCount++
		}
	}
	fmt.Printf("The KeyWord %s is found %d times\n", word, wordCount)