Instead of this unreadable mess of chars:
(19|20)\d\d[- /.](0[1-9]|1)[- /.](0[1-9]|[0-9]|3)
add some comments to make it more readable:
(?#year)(19|20)\d\d[- /.](?#month)(0[1-9]|1)[- /.](?#day)(0[1-9]|[0-9]|3)
Test based on a regular expression with two comments:
var strip = ;var exp = '^(?#user)[^!]+!(?#post)[^!]+$';console;console;console;console;
$ node example.jswith comments: ^(?#user)[^!]+!(?#post)[^!]+$without comments: ^[^!]+![^!]+$matches: truemathces: true
A valid comment starts with
(?#, followed 0-x characters that aren't
the closing paren, then
Or, in regular expression form:
Given an expression as a string, return a version of that string without RegExp comments.
Since it's a string, don't forget double escaping:
/\d/ === '\\d';
Create a regular expression object from the stripped version of
With npm do:
npm install reg-comments
Copyright (c) 2013 Julian Gruber <email@example.com>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.