Since the introduction of iCloud Backup, developers have increasingly faced the following reason for rejected binary:

2.23: Apps must follow the iOS Data Storage Guidelines or they will be rejected

The iOS Data Storage Guidelines indicate that only content that the user creates using your app, e.g., documents, new files, edits, etc., should be backed up by iCloud.

This all boils down to understanding iOS Data Storage Guidelines.

While integrating Chartboost into MoPub for an iOS app, I encountered a crash every time there is a Chartboost ad loading.

The error is:

ChartboostInterstitialCustomEvent requestAdWithSize customEventInfo unrecognized selector 

You can enable iAd network ONLY when your app is in an editable state. That is after uploading binary and before being approved.

If not, you can’t.

I am not sure how many developers forgot to enable iAd. But I am one. And I blatantly forgot to enable 1 app for over a year.. (I also use Admob, Mopub, MMedia, etc)

Why can’t we just flick the switch?

I encountered the following error when I try to create a new post in Octopress:

You have already activated rake 10.0.4, but your Gemfile requires rake 0.9.2.2. Using bundle exec may solve this.

While using Cocoapod and running pod install, I encountered the following error:

[!] The platform of the target `Pods` (iOS 4.3) is not compatible with `FlatUIKit (1.1)` which has a minimum requirement of iOS 5.0.

If you to be more efficient with computers, you must use the keyboard more than the mouse.

For Mac, it remains a mystery why there isn’t a built-in keyboard shortcut for “right clicking”. As of Jun 2013, with Mountain Lion, we still lack that.

However, there is a workaround. But it is recommended only for Mac users with a separate numpad.

Luckily I chose to have a Apple Keyboard with Numeric Keypad for my new 27” iMac..

OpenCV has a matchTemplate function that let you seach for matches between an image and a given template.

Tesseract is the OCR engine that helps to recoginze text. Google now maintains the project.

You can use Tesseract on iOS too.

I forked the github project because the original has a couple of problems compiling. To be precise:

File is universal (three slices), but it does not contain a(n) ARMv7-s slice for ..

I have create youtube-parser, a small node.js app to extract youtube video links from Youtube.com.

You can find out why I need that..

You can show hidden files in Finder on your Mountain Lion (or any Mac OS).

On Terminal, run this:

defaults write com.apple.Finder AppleShowAllFiles YES