[Ruby] Removing Half-width and Full-width Spaces from Strings

A short Ruby gsub snippet for stripping both half-width and full-width spaces from a string.

[Git] Installation Steps for CUI Tool tig

brew install tig to get the Git CUI browser tig set up on Mac quickly.

DOCTYPE Declaration and Character Encoding Issues for Supporting Three Mobile Carriers

Fixing mojibake on Japan's three-mobile-carrier sites with a Shift_JIS Content-Type meta tag in HTML and XHTML.

[Sublime Text 2] Solution for Package Control: Install Packages Not Working

Fixing a broken Package Control: Install Packages in Sublime Text 2 by removing the whole config directory.

[Sublime Text] How to Set Up Package Control

Installing Package Control in Sublime Text 2 via the console bootstrap and verifying it in the Command Palette.

[Mac] Installing nkf with Homebrew

Installing the nkf character encoding converter on macOS with brew install nkf.

[Ruby on Rails] CSV Import/Export

Reference links and notes for CSV import/export in Ruby on Rails.

[Chrome] SPDY indicator - Extension to Check SPDY Enable/Disable Status

A quick note on installing the Chrome extension SPDY indicator to check SPDY enable/disable status.

[Ruby on Rails] Setting Conditions for before_filter

Reference links for setting conditions on before_filter in Ruby on Rails.

[RSpec] How to Test Private Methods

How to test private methods in Rails + RSpec by invoking them via Object#send.

Minimum specifications required for Windows 7 operation

Windows 7 minimum system requirements quoted from Microsoft's official spec.

[Ruby on Rails] Grouping validations using with_options

Using with_options to group conditional Active Record validations under a single :if block.

[Ruby on Rails] form_for and form helper summary

A personal cheat sheet of Ruby on Rails form_for and form helpers such as f.select.

[Ruby on Rails] ArgumentError (invalid byte sequence in US-ASCII)

Fixing `ArgumentError (invalid byte sequence in US-ASCII)` in Rails by adding `# encoding: utf-8` to the file header.

[MySQL] Getting stuck with reserved words - ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'xxx' at line 1

MySQL threw ERROR 1064 on a query because the column name primary is a reserved word.

[Node.js] Sanitize and validate with node-validator

A quick pointer to node-validator, a handy Node.js package for sanitizing and validating input.

[Ruby] Introduction to state_machine

Reference links for getting started with state_machine, a Ruby gem for managing object state transitions.

[Sublime Text 2] Customizing tab switching command with Ctrl+Tab

A small Sublime Text 2 keybinding tweak that switches `Ctrl+Tab` to walk tabs in order instead of by MRU.

[JavaScript][jQuery] Checking for the existence of DOM elements

Six ways to check DOM element existence in JavaScript and jQuery, ranked by execution speed.

[Facebook] Handling Revoked Permissions - 失効権限の取り扱い

A quick reference from Facebook's Handling Revoked Permissions doc on dealing with declined or revoked scopes.

[Ruby on Rails] How to change title for each page

Per-page title and meta tags in Rails using content_for and yield, with ERB and Haml examples.

[MongoDB] Display all records with find().forEach(printjson) or .toArray()

Two ways around mongo shell's 'has more' cutoff: .forEach(printjson) and .toArray().

[Chrome] Chrome extension 'jsoff' that can turn off JavaScript with one click

A quick pointer to 'jsoff', a Chrome extension for toggling JavaScript on and off with one click.

[Ruby] Use 'sunspot' for full-text search engine Solr

Reference links for the sunspot gem, which connects Rails apps to the Solr full-text search engine, including RSpec testing tips.

[Linux] About Memory Management

A quick reference note on Linux memory management and memory leak detection.

Image compression sites and tools summary

A short roundup of JPEGmini for JPEG, TinyPNG for PNG, and ImageOptim for the Mac.

JsDoc Toolkit Introduction

Intro notes on JsDoc Toolkit — reference sites, Homebrew install, and templates.

[WordPress] Steps to add a 'Send with LINE' button to WPTouch

Adding a 'Send with LINE' share button to WPTouch, and making it open in a new tab.

[Ruby] For file uploads, use 'CarrierWave'

Notes on the CarrierWave gem for file uploads in Rails, plus how to test uploads with RSpec.

[Ruby on Rails] How to limit default actions with 'only' while adding custom actions

Restrict Rails `resources` with `only:` and still add a custom collection action like `search`.

[Ruby on Rails] How to use acts_as_list

Reference links for using acts_as_list with jQuery UI Sortable in Rails.

[Ruby] Development HTTP Server 'Pow' by 37signals

Using 37signals' Pow — a zero-config Rack dev server for macOS — with Rails and Sinatra apps.

[Ruby on Rails] Converting line breaks to br tags

A custom Rails helper for converting line breaks to br tags, without the p tags that simple_format inserts.

Summary of Google Chrome Developer Tools Introduction Articles

A short link roundup of introductory articles for Google Chrome Developer Tools.

[Ruby on Rails] How to get the current URL (including parameters)

Getting the current URL with url_for(params) in Rails 3, plus adding and removing query parameters.

Haml Tips

Handy Haml tips: conditional class names and repeating ul/li output with in_groups_of.

[Capistrano] Recipe for executing rake tasks

A Capistrano recipe for invoking rake tasks on a remote server, with a namespace-collision workaround.

[Node.js] How to resolve Error: Cannot find module 'express'

Fixing Node.js Cannot find module 'express' by reinstalling dependencies with npm install -d.

[RSpec] Various ways to use Devise in test code

Rails + RSpec notes on testing Devise-protected controllers by stubbing current_user in a before block.

[Node.js] gyp ERR! configure error Error: EACCES, mkdir '/Users/name/.node-gyp'

Working around node-gyp's EACCES mkdir '/Users/name/.node-gyp' error with mkdir and chmod.

[Mac] Steps to install GMP with Homebrew

Install GMP, the arbitrary precision arithmetic library, on macOS with a single `brew install gmp`.

[Mac] Steps to install ImageMagick with Homebrew

A quick note on installing ImageMagick on macOS with a single Homebrew command.

[Mac] Installing MongoDB with Homebrew

Installing MongoDB with Homebrew on macOS and setting it up as a launchd auto-start service.

[Ruby on Rails] How to use helper methods in controllers and models

How to call Rails helper methods from controllers and models by including ActionView::Helpers.

[Ruby on Rails] How to use arel_table

Reference links for learning how to use Rails' arel_table.

[Ruby on Rails] Use blank? or present? instead of nil? to check model attributes

Use blank? or present? instead of nil? when checking Rails model attributes.

[Ruby] Differences between count, size, and length

A link roundup on the differences between count, size, and length in Ruby.

[Ruby] RSpec Beginner Articles Summary

A curated list of beginner references for RSpec, grouped by topic (views, requests, syntax, config).

[cURL] GET/POST/PUT/DELETE

A short memo on using cURL's -X option to send GET / POST / PUT / DELETE requests.

[PHP] How to Use Excel_Reviser

Reference links for working with the Excel_Reviser PHP library, which even supports PHP 4.