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03. 円周率

Last updated at Posted at 2019-11-28

03. 円周率

"Now I need a drink, alcoholic of course, after the heavy lectures involving quantum mechanics."という文を単語に分解し,各単語の(アルファベットの)文字数を先頭から出現順に並べたリストを作成せよ.

###Go

package main

import (
	"fmt"
	"regexp"
	"strings"
)

func main() {
	var src string = "Now I need a drink, alcoholic of course, after the heavy lectures involving quantum mechanics."
	var wlen []int
	rex := regexp.MustCompile("([a-zA-Z]+)")

	//	単語に分割
	words := strings.Split(src, " ")
	for _, word := range words {
		//	アルファベットのみを抽出
		match := rex.FindStringSubmatch(word)

		//	アルファベットの文字数を保存
		wlen = append(wlen, len(match[1]))
	}

	//	結果を表示
	fmt.Println(wlen)
}

###python

# -*- coding: utf-8 -*-
import re

src = "Now I need a drink, alcoholic of course, after the heavy lectures involving quantum mechanics."
wlen = []

#   正規表現パターン定義(アルファベットのみ)
pattern = re.compile('([a-zA-Z]+)')

#   単語に分割
words = src.split(" ")
for word in words:
    #   アルファベットのみ抽出
    result = re.search(pattern, word).group()

    #   アルファベットの文字数を保存
    wlen.append(len(result))

#   結果を表示
print(wlen)

###Javascript

var src = "Now I need a drink, alcoholic of course, after the heavy lectures involving quantum mechanics."
var wlen = [];

//	ループ版
var words = src.split(' ');
for (var i = 0; i < words.length; i++) {
    val = words[i].match(/[a-zA-Z]+/);
    wlen.push(val[0].length);
}
console.log(wlen);


//  forEach 版
var wlen = [];
src.split(' ').forEach(function (value) {
    this.push(value.match(/[a-zA-Z]+/)[0].length);
}, wlen)

console.log(wlen);

まとめ

以外と簡単と作ったが、他の人の結果を見て間違ってることに気づいた。 "." や "," は抜くのか。
アルファベット判別は少し悩んだが、正規表現で対応。Goの正規表現処理は遅いんだったかな?。

問題の円周率の意味が解った時は、なんとなく嬉しかった。w

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