Tips

Eval Expression is a Mac OS X service to evaluate the selected text of any text field as a Ruby expression. My instinct was to choose Perl, however Ruby offers binary in addition to decimal, hex and octal numerical literals. The service becomes infinitely more useful if you assign it a global shortcut in Keyboard preferences. In my case I assigned a combination that seemed obvious, ⌘= It came about as I was working on some layout in Xcode 4 / Interface Builder, and needed to adjust the Y position of a view by a specific number of units....

I like to reuse the same private keys when generating a signing request to renew my Apple developer certificates. Unfortunately you can’t do this with Keychain Access, as it won’t save the signing request file after you step through the wizard. OpenSSL is your friend. Open Keychain Access, RMB on the key your wish to use and click Export “[Key Name]”. Save it as a .p12 file with a strong password....

To make it easier to find the assembly generated when you ‘Show Assembly Code’, embed comments using: asm("# your comment")