Command-line PDF printing is useful for batch jobs and headless systems, with lp sending files to the default or a chosen CUPS printer.

ActiveSupport String#camelize(:lower) turns snake_case into lowerCamelCase for JavaScript-style naming without custom string handling.

rake -W [substring_of_task] locates the source file and line for a Rake task when its definition is hard to find.

Prototype event handling on individual elements is brittle and breaks after AJAX replacement. Delegated document.on bindings keep change handlers working on dynamic content.

openssl s_client can verify whether a server supports Perfect Forward Secrecy by checking if a cipher handshake succeeds or fails.

Checks a server hostname for the Heartbleed vulnerability in OpenSSL (CVE-2014-0160).

A flaw in OpenSSL and SSL/TLS can expose protected data to attackers and leak secrets from encrypted internet traffic.

TextMate2 can misclassify Cucumber step definition files as plain Ruby, and fileType settings in .tm_properties assign them the correct syntax scope.

Generating PDFs in Rails often means choosing between text-based reports, HTML-to-PDF rendering, and different trade-offs in layout control and browser fidelity.

Integer-backed model attributes can be queried by symbolic names, making state handling clearer and avoiding hard-coded numeric values.

MariaDB 10 adds replication, NoSQL capabilities and sharding for web-scale workloads, bringing features developed with major high-traffic users into general availability.

Class methods are harder to refactor into smaller units because they cannot hold state, so shared context must be threaded through repeated parameters.

Real data makes demos and screenshots look convincing, but names and values need masking to avoid exposing sensitive information. Faker can quickly replace personal details with plausible placeholders.

A gem supports the form model approach for managing form data and validation with a cleaner object-oriented structure.

IE10 and IE11 Metro mode can hide the tab bar and address bar when used with a mouse; right-clicking restores the controls.

Ruby threads share a writable heap inside one VM process, so unsynchronized access can cause unexpected behavior in concurrent code.

Directory of popular GitHub projects for discovering widely used repositories and tools.

Judging legacy code by today’s needs hides the uncertainty faced during initial development, where many architecture and technology choices were made with incomplete information.

Private and internal servers can be tested through the BrowserStack cloud without exposing them publicly, even behind firewalls, proxies, or Active Directory.

Rails 3 automatically escapes helper output to prevent XSS, but some views need raw HTML instead. Disabling that protection changes how helper values are rendered and can reintroduce injection risk.

Holding Shift while using the mouse wheel can scroll horizontally on Ubuntu, and many applications support it.

Drop-down menus can hide choices, slow selection, and be awkward on mobile; radio buttons, checkboxes, autocomplete, and segmented controls often work better.

Count weekdays between two dates in Ruby by iterating over a Date range and filtering Monday through Friday.