Word Count
This page was last reviewed on May 30, 2023.
Dot Net Perls
Word count. This sentence has a certain number of words. But how many? With a Golang method, we can count sequences of non-whitespace characters—these are words.
With a word count method, we can generate statistics about text. We can verify that it is correct. A regexp can be used for the most accurate word counting.
Example func. To write a simple word count func in Golang, we can use regexp. Think of a series of words—the one thing we can do to detect a word is find a sequence of letters or digits.
And Letters or digits are non-whitespace characters. We can use a special regexp metacharacter to detect these.
Detail In WordCount we invoke FindAllString with a -1 argument—this finds all matches.
Finally We return the length of the results found by FindAllString. This is our entire word counting method.
package main import ( "fmt" "regexp" ) func WordCount(value string) int { // Match non-space character sequences. re := regexp.MustCompile(`[\S]+`) // Find all matches and return count. results := re.FindAllString(value, -1) return len(results) } func main() { // This has 10 words. fmt.Println(WordCount("To be or not to be, that is the question.")) // This has 1 word. fmt.Println(WordCount("Hello")) // This has 2 words. fmt.Println(WordCount("Hello friend")) }
10 1 2
Notes, results. With some simple string tests, we can see that the results appear correct. The string "Hello" has just 1 word. The string "Hello friend" has 2.
Handling punctuation. An important thing to get right in word counting I show punctuation separates words. A double-hyphen can separate 2 words—the regexp must handle this case.
A review. For an easy-to-write and fairly accurate word counting method, counting sequences of 1 or more non-whitespace chars is a good option. More advanced approaches are possible.
Dot Net Perls is a collection of tested code examples. Pages are continually updated to stay current, with code correctness a top priority.
Sam Allen is passionate about computer languages. In the past, his work has been recommended by Apple and Microsoft and he has studied computers at a selective university in the United States.
No updates found for this page.
© 2007-2024 Sam Allen.