You can write regular expressions some different ways, e.g. /regex/ and %r{regex}. For examples, look here. Remember that it is always a good idea to match a regex visually...

Alternation cat|dog will match cat in "About cats and dogs", if RegEx is applied again, it will match dog Quantifiers ? none or one, e.g. colou?r matches...

When you repeat a subpattern with a *, + or {...} operator, you may choose between greedy, lazy and possessive modes. Switching modes...

Ruby has two different ways to match the start and the end of a text: ^ (Start of line) and $ (End...

...errors. Regular expressions can help you out here. Open find and replace Activate the regex mode (click on the .* icon next to the "find" field). Fill in find field with...

...to convert the url "..." to the urls ["..."] here. Open find and replace Activate the regex mode Fill in find field with e.g. url (? .*?) Hint: the "url" at the beginning of...

...is growing complex, you can use the /x modifier to ignore whitespace and comments: regexp = %r{ start # some text \s # white space char (group) # first group (?:alt1|alt2) # some alternation...

...contained in a character class. More tools to simplify regular expessions Named capture groups

Percent Notation We already know that that we can create strings using the percent notation: %(<foo="bar's ton">) is...

An alternative of using a multiple assignment for a Regex are named groups. Especially when your Regex becomes more complicates it is easier to understand and to process. Note:

...reasons, though. Since Ruby 2.3, Ruby's URI lib provides a built-in email regex URI::MailTo::EMAIL_REGEXP. That's the best solution to work with.

...want to be less restrictive about the email verification, you can use the default regex from Devise: Devise.email_regexp => /\A[^@\s]+@[^@\s]+\z/ Other patterns we used in the past...

def foo(expected, actual) expected === actual end In case expected is a Regex, it suggests to change it to the following pattern: def foo(expected, actual) expected.match?(actual...

In case expected is a Regex or a String, you need to keep ===. Otherwise the actual expression is always converted to a regular expression. # For expected === actual

When you have many changes, and you want to spread them across different commits, here is a way to stage...

For Email-Patterns see most recent E-Mail-Pattern. HOST = /\A[a-z0-9]+[a-z0-9\-\.]*[a-z0-9...

A collection of code snippets which return a boolean value for a regex comparison. regexp.match?(string) # Recommended for Ruby >= 2.4 !!(string =~ regexp) # Recommended for older Rubies regexp === string !(regexp !~ string...

...The Ruby 2.4 method Regexp#match? does not set globals like $~ or $1, so it should be more performant...

...your Terser configuration in webpack.config.js: { ... optimization: { minimize: true, minimizer: [ new TerserPlugin({ terserOptions: { ..., mangle: { properties: { regex: /^[_#]/ } } } }) ] } } Configuring Webpacker (Rails) To configure Webpack to mangle private properties, make a change to your...

const TerserPlugin = require('terser-webpack-plugin') terser = webpackConfig.optimization.minimizer.find(plugin => (plugin instanceof TerserPlugin)) terser.options.terserOptions.mangle.properties = { regex: /^[_#]/ } module.exports = webpackConfig

Regular expressions in Javascript are represented by a RegExp object. There also is a regex literal as in many other languages: /regex/. However, they are used slightly differently.

Shorthand for creating a regular expression object RegExp() object Usage: RegExp("foo+") or new RegExp("foo+") No surrounding slashes required (they're the literal markers) Since the argument...

...and does not depend on an external SaaS service. Truemail supports different validation "layers": Regex validation: if the given address is syntactically valid DNS validation (called MX validation): if the...

...validation_type = :mx), but set config.not_rfc_mx_lookup_flow = true. Validation methods explained Regex validation (1) is pretty straight-forward and basically "free" since you're not making and...

...library, Slides) Tool to check if you are affected Ruby: Using named groups in Regex Exercises Find words Write a method second_words(string) that returns the second word of...

You don't need to implement the parser as a single giant regex. Instead write individual patterns for methods, accessors, etc. Call each patterns until there are no...

...service-endpoints sample_limit: 10000 kubernetes_sd_configs: - role: endpoints relabel_configs: - action: keep regex: true source_labels: - __meta_kubernetes_service_annotation_prometheus_io_scrape - action: replace source_labels: - __meta...

...service-endpoints sample_limit: 10000 kubernetes_sd_configs: - role: endpoints relabel_configs: - action: keep regex: true source_labels: - __meta_kubernetes_service_annotation_prometheus_io_scrape - action: replace source_labels: - __meta...

...take your escaped quotation marks. Workarounds One workaround is to write the step as regex (since there is a step taking a regex): Then I should see /Did you see...

...those "quotation marks" over there\?/ Keep in mind it’s a regex – escape regex characters like '?'. When you have a Cucumber step like Then I should fill in "query" with...

...Find in File..."). The directory filter will be automatically filled with the marked directory. Regex (alt + x) Your possibilities are almost endless here - you can use the full power of...

...Info About Your Ruby Gems Environment gem environment Mocking Requests With Partial URIs Using Regex Note the elegant way to describe Regex URLs: %r|/foo/bar| stub_request(:post, %r|/api/posts...

Note: The step below will override a spreewald step and allows to use Regex for the filename. You might want to rename this step within you project in case...

Parser docker Mem_Buf_Limit 5MB customParsers: | [PARSER] Name multi_line Format regex Regex (? ^{"log":"\d{4}-\d{2}-\d...