File Content: option-transform.js 'use strict'; const braces = require('..'); const alpha = braces.expand('x/{a..e}/y', { transform(code, index) { // when non-numeric values are passed, "code" is a character code, return 'foo/' + String.fromCharCode(code) + '-' + index; } }); console.log(alpha); //=> [ 'x/foo/a-0/y', 'x/foo/b-1/y', 'x/foo/c-2/y', 'x/foo/d-3/y', 'x/foo/e-4/y' ] const numeric = braces.expand('{1..5}', { transform(value, index) { return 'foo/' + value * 2; } }); console.log(numeric); //=> [ 'foo/2', 'foo/4', 'foo/6', 'foo/8', 'foo/10' ] Submit