To close a frozen SSH connection, just type in the following order…

Enter
~
.


This bugs the hell out of me daily, so thanks John!

I never knew until recently that you can compare files in TextWrangler… and its easy.

Simply highlight the 2 files you want to compare in the Documents drawer, right click on them and select the option ‘Compare Selected Documents‘.

Now the 2 files will open into 2 windows with a review of the differences below them. You can then apply the differences in either direction.

Another tip is adding keyboard shortcuts to TextWrangler’s menu options.

I like to use the Search -› Jump Back/Forward option to navigate around a large body of code but alas it has no keyboard shortcut. So each time you wish to move from one Jump mark to another, you need to go up to the Search menu… which kinda defeats the handiness of the option in the first place.

Anyways, to add a keyboard shortcut to this (or some other useful menu) option, go to Textwrangler -› Preferences.

Select Menus…

Find the menu heading for the option you want, in my case Search…

In the menu header, find the option(s) you want to add a keyboard shortcut to.

Highlight an option and press the Set Key button.

Enter the keyboard shortcut and press the Set button.

Bingo.

Lastly, a while back I wrote a shell script to format my XML. To add a shortcut to this, you need to select Window -› Palettes -› Unix Filters

Select the script you want to shortcut and press the Set Key… button. Enter your keyboard shortcut and press the Set button and now when you want to format some messy XML, you have a keyboard shortcut to knock it into shape.

Anyway a simple way to determine if a number is odd or even, use the following code.

function is_odd( $number ) {
    return $number & 1;
}

Quick explanation
& is a binary AND.

If you have a binary value, and you AND with another binary value, then the result will be the bitwise AND of the two.

Binary values are a series of bits or 1′s and 0′s. However we are only concerned with the rightmost one ( the least significant bit ) as when a binary value ends with a 1, it is odd… when it ends with a 0 it is even.

Now, if I pass that function say the number 13, the binary value will look like 1101.
When you AND with a 1, or binary value 0001, it looks like this…

1101 & 0001 = 0001

We look to the least significant bit, which is a 1, which means the number is odd.

A simple explanation of binary can be found here.