63 lines
1.2 KiB
Go
63 lines
1.2 KiB
Go
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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import os
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fn main() {
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mut path := 'cinderella.txt'
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if os.args.len != 2 {
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println('usage: word_counter [text_file]')
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println('using $path')
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}
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else {
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path = os.args[1]
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}
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contents := os.read_file(path.trim_space()) or {
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println('failed to open $path')
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return
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}
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mut m := map[string]int{}
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for word in contents.to_lower().split(' ') {
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key := filter_word(word)
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if key == '' {
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continue
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}
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m[key] = m[key] + 1// TODO m[key]++
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}
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// Sort the keys
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mut keys := []string
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for e in m.entries {
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keys << e.key
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}
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keys.sort()
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// Print the map
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for key in keys {
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val := m[key]
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println('$key => $val')
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}
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}
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// Removes punctuation
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fn filter_word(word string) string {
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if word == '' || word == ' ' {
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return ''
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}
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mut i := 0
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for i < word.len && !is_letter(word[i]) {
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i++
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}
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start := i
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for i < word.len && is_letter(word[i]) {
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i++
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}
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end := i
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return word.substr(start, end)
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}
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// TODO remove once it's possible to call word[i].is_letter()
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fn is_letter(c byte) bool {
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return c.is_letter()
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}
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