V 0.0.12 open-source release

examples/word_counter/word_counter.v

@@ -0,0 +1,58 @@
+import os
+
+fn main() {
+	mut path = 'cinderella.txt'
+	if os.args.len != 2 {
+		println('usage: word_counter [text_file]')
+		println('using $path')
+	}
+	else {
+		path = os.args[1]
+	}
+	lines := os.read_file_lines(path.trim_space())
+	mut m := map[string]int{}
+	for line in lines {
+		words := line.to_lower().split(' ')
+		for word in words {
+			key := filter_word(word)
+			if key == '' {
+				continue
+			}
+			m[key] = m[key] + 1// TODO m[key]++
+		}
+	}
+	// Sort the keys
+	mut keys := []string
+	for e in m.entries {
+		keys << e.key
+	}
+	keys.sort()
+	// Print the map
+	for key in keys {
+		val := m[key]
+		println('$key => $val')
+	}
+}
+
+// Removes punctuation
+fn filter_word(word string) string {
+	if word == '' || word == ' ' {
+		return ''
+	}
+	mut i := 0
+	for i < word.len && !is_letter(word[i]) {
+		i++
+	}
+	start := i
+	for i < word.len && is_letter(word[i]) {
+		i++
+	}
+	end := i
+	return word.substr(start, end)
+}
+
+// TODO remove once it's possible to call word[i].is_letter()
+fn is_letter(c byte) bool {
+	return c.is_letter()
+}
+