[iOS] How to Handle NSOperationQueue as a Singleton

A category-based approach to using NSOperationQueue as a singleton in iOS.

[iOS] How to Resolve EXC_BAD_ACCESS Errors

Reference links and real-world cases of EXC_BAD_ACCESS errors hit during iOS development.

[iOS] duplicate symbols: libGoogleAnalytics.a and libGoogleAnalytics_debug.a Cannot Coexist

Resolving duplicate symbols between libGoogleAnalytics.a and libGoogleAnalytics_debug.a by linking only one.

[Android] How to Configure SD Card Usage in Emulator

How to enable SD card usage in the Android emulator by specifying its size from the AVD Manager in Eclipse.

CSS Framework Comparison Site

A short bookmark for usabli.ca's CSS framework comparison site.

[iOS] SDWebImage - A Library for Asynchronous Image Loading + Caching

Notes on SDWebImage, an iOS library for async image loading and caching.

[iOS] How to Implement Push Notification Feature Using Parse.com

Reference links used to implement push notifications in an iOS app with Parse.com.

[macOS] Divvy - An App to Change Window Size and Position with Keyboard Shortcuts

Configuring Divvy on macOS with a global launch shortcut and five window-placement shortcuts (left, right, up, down, full).

[Eclipse] No projects are found to import

Fixing Eclipse's "No projects are found to import" error by adding a .project file.

[Android] "ES Task Manager" for Memory Release and Task Termination

Using "ES Task Manager" to kill app tasks per screen and check for crashes or broken navigation on resume.

[iOS] How to Use the Library Management Tool "CocoaPods"

A first-time setup memo for CocoaPods — install, pod setup, Podfile basics, and building libPods.a.

[Mac] "Magican" - An App to Find and Delete Unnecessary Files

Using the free Magican utility to clean up unnecessary files and free disk space on Mac.

[Android] How to Call Activities from External Packages

A quick note on launching an Activity from another package with Intent#setClassName.

[Android] App Internationalization Support (English/Japanese localization)

Localizing an Android app between English and Japanese by splitting values/strings.xml and values-ja/strings.xml.

Google Analytics SDK for Android v2 EasyTracker Parameters

Reference links for EasyTracker parameters in Google Analytics SDK for Android v2.

[Android] Application#onTerminate() does not work on actual devices

Application#onTerminate() never fires on production Android devices — a short note with references.

[Linux] Commands to Get File Hash Values

Compute file hashes on Linux with openssl sha1 for SHA-1 and md5sum -b for MD5.

[Android] Switching debug mode with android:debuggable is deprecated

Setting android:debuggable in AndroidManifest.xml to switch debug mode is deprecated.

[Android] Waiting for Debugger - Application XXX is waiting for the debugger to Attach Error

Restarting Eclipse fixed the Android 'Waiting for Debugger' hang when launching an app in debug mode.

[Android] How to Fix Nexus7 When It Won't Start

Bringing a fully discharged Nexus 7 back to life with a long power-button press or the power + volume-key combo.

[iOS] xcode cannot run using the selected device - No provisioned iOS devices are available with a compatible iOS version. Connect an iOS device with a recent enough version of iOS to run your application or choose an iOS simulator as the destination.

Clearing the 'No provisioned iOS devices' error via Organizer's 'Use for Development' button in Xcode.

[Android] How to Take Screenshots of Emulator via Eclipse

A short memo linking to a reference on taking Android emulator screenshots via Eclipse.

[Android] How to Configure Eclipse (Mac) Emulator to Connect to the Internet

Configuring the Android emulator's DNS in Eclipse on Mac to restore internet connectivity.

[Android][AdMob] Error parsing XML: unbound prefix error

Fix an 'unbound prefix' XML error when adding AdMob to an Android layout by declaring xmlns:ads.

[Android] How to Center AdMob

Reference link for centering AdMob ads in an Android layout.

[Android] Calling getWindowManager inside a fragment

Inside a Fragment, get DisplayMetrics via getActivity().getWindowManager() instead of getWindowManager().

[Android] How to Change Package Name

A short memo linking to a reference for changing the package name of an Android app.

[Android] Unable to find explicit activity class {activity name}; have you declared this activity in your AndroidManifest.xml?

How to resolve the Android 'Unable to find explicit activity class' error by declaring the activity in AndroidManifest.xml.

[Android] INSTALL_PARSE_FAILED_NO_CERTIFICATES error

The simplest fix for INSTALL_PARSE_FAILED_NO_CERTIFICATES is to build a signed APK and install that instead.

[Eclipse] How to Rename an Existing Project

A quick memo on renaming an existing project in Eclipse using the Refactor: Rename feature.

[Android] Unable to create external cache directory error

The Unable to create external cache directory error was fixed by declaring WRITE_EXTERNAL_STORAGE.

[Android] ActionBarSherlock Jar mismatch! Fix your dependencies error

Fixing duplicate android-support-v4.jar conflicts when importing ActionBarSherlock.

Eclipse Configuration Settings Memo

A quick memo on enabling whitespace display and soft tabs in Eclipse's text editor preferences.

[Android] How to Import External Libraries and SDKs

Importing external libraries and SDKs like the Facebook SDK into an Android project in Eclipse.

[GitHub] Making PullRequests Easier with the hub Command

Use the hub CLI to send GitHub Pull Requests from the command line instead of a browser.

[Ruby on Rails] PDFKit doesn't work with NoMethodError (undefined method `chomp' for nil:NilClass): error

Fixing PDFKit's `chomp` nil error on CentOS + Passenger by exporting PATH via a ruby_wrapper script.

[Ruby on Rails] ActionDispatch::Cookies::CookieOverflow error

Fixing Rails' CookieOverflow error by moving the session store off cookies onto ActiveRecord or Redis.

[Linux] Steps to Install ImageMagick from Source Files

Building ImageMagick from source on CentOS 6 with configure, make, and make install.

[CentOS] Installing ImageMagick with yum

Installing ImageMagick on CentOS 6.3 with yum, then verifying with identify and convert.

[Apache] How to Configure umask for the Execution User

Setting Apache's execution user umask to 002 via envvars to keep multi-user Capistrano deploys free of permission conflicts.

[Ruby] Filtering with multiple columns from related tables using sunspot

Filtering by multiple columns on a related table in sunspot via a multi-value integer field in the searchable block.

[RSpec] Stubbing Time.now

A tiny snippet for stubbing Time.now in Rails + RSpec to return a fixed timestamp.

[Android][Eclipse] Cannot build project until build path errors are resolved

Fixing Eclipse's build path error after importing an Android project by ticking Android x.x under Order and Export.

[Mac] How to Set Up Android App Development Environment Using Eclipse

A memo on setting up an Android app development environment on Mac using Eclipse and the Android SDK.

[WiMax] How to Fix Connection Issues with Aterm WM3600R

Reference notes for fixing frequent Wi-Fi disconnects on Aterm WM3600R.

[RubyGems] Could not find xxx in any of the sources

Fixing Bundler's 'Could not find gem in sources' by matching the version available on RubyGems.

[Ruby] Uninstalling Passenger

Example console output for uninstalling the Phusion Passenger gem with `gem uninstall passenger`.

[Ruby] How to Uninstall Ruby 1.9.3 Installed from Source Code

Uninstalling a source-built Ruby 1.9.3 by feeding .installed.list to xargs rm.

[RSpec] Specifying Seed File Loading Path with SeedFu.fixture_paths for SeedFu.seed

A spec_helper snippet showing how to load seeds from multiple directories via SeedFu.fixture_paths before RSpec runs.

[CentOS] Character Encoding Settings

A short memo on switching the CentOS locale to ja_JP.UTF-8 by editing /etc/sysconfig/i18n.