9_1_regexp_golf.js

// Fill in the regular expressions

verify(/ca[rt]/, ['my car', 'bad cats'], ['camper', 'high art']);

verify(/pr?op/, ['pop culture', 'mad props'], ['plop', 'prrrop']);

verify(/ferr(et|y|ari)/, ['ferret', 'ferry', 'ferrari'], ['ferrum', 'transfer A']);

verify(/ious\b/, ['how delicious', 'spacious room'], ['ruinous', 'consciousness']);

verify(/\s[.,:;]/, ['bad punctuation .'], ['escape the period']);

verify(/\w{7}/, ['hottentottententen'], ['no', 'hotten totten tenten']);

verify(/\b[^e\s]+\b/i, ['red platypus', 'wobbling nest'], ['earth bed', 'learning ape', 'BEET']);

function verify(regexp, yes, no) {
  // Ignore unfinished exercises
  if (regexp.source == '...') return;
  for (let str of yes)
    if (!regexp.test(str)) {
      console.log(`Failure to match '${str}'`);
    }
  for (let str of no)
    if (regexp.test(str)) {
      console.log(`Unexpected match for '${str}'`);
    }
}