開発環境
- macOS Sierra - Apple (OS)
- Emacs (Text Editor)
- JavaScript (プログラミング言語)
- Safari(Web browser)
Eloquent JavaScript(Marijn Haverbeke 著、No Starch Press)のPart 1(Language)、Chapter 9(Regular Expressions)、Exercises(Regexp Golf)を取り組んでみる。
Exercises(Regexp Golf)
コード(Emacs)
JavaScript
{ 'use strict'; let reg1 = /ca[rt]/, reg2 = /pr?op/, reg3 = /ferr(et|y|ari)/, reg4 = /\b\w*ious\b/, reg5 = /[\.,:;]\s/, reg6 = /\w{6,}/, reg7 =/[a-df-z]+/, regs = [reg1, reg2, reg3, reg4, reg5, reg6, reg7]; let s = 'car and cat, pop and prop, ferret, ferry, and ferrari, ' + 'any word ending in ious, a whitespace character followed by a dot, ' + 'comma, coln, or semicolon, a word longer than six letters, ' + 'a word without the letter e'; regs.forEach((reg) => { console.log(reg, reg.test(s)); }); console.log(); regs.forEach((reg) => { console.log(reg, reg.exec(s)[0]); }); }
入出力結果(Terminal, Node.js)
$ node sample1.js /ca[rt]/ true /pr?op/ true /ferr(et|y|ari)/ true /\b\w*ious\b/ true /[\.,:;]\s/ true /\w{6,}/ true /[a-df-z]+/ true /ca[rt]/ 'car' /pr?op/ 'pop' /ferr(et|y|ari)/ 'ferret' /\b\w*ious\b/ 'ious' /[\.,:;]\s/ ', ' /\w{6,}/ 'ferret' /[a-df-z]+/ 'car' $
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