Counts and expands any given regular expression into all the possible strings that it would be able to match.
npm i genex --saveconst genex = require('genex');
const pattern = genex(/(foo|bar|baz){1,2}|snafu/);
// 13
console.log(pattern.count());
/*
[
'foo', 'foofoo', 'foobar', 'foobaz',
'bar', 'barfoo', 'barbar', 'barbaz',
'baz', 'bazfoo', 'bazbar', 'bazbaz',
'snafu'
]
*/
console.log(pattern.generate());The generate() method also accepts an optional callback:
pattern.generate((value) => {
if (value.startsWith('foo') !== true) {
return false; // breaks iteration
}
console.log(value); // 'foo', 'foofoo', 'foobar', 'foobaz',
});MIT