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by Matt Sephton
“The Services menu in Mac OS X (from 10.6 onwards) lets you use features of one application while working in another. The Services menu is contextual, so it shows just the services appropriate for the application you’re using or content you’re viewing rather than all available services. You can access services with a right click of your mouse or Control-click of your trackpad. You can configure the menu to show only the services you want, and you can even create your own services using Automator.” —Apple
These use the bc command to calculate the mathematical result of expressions within the selected text in any application.
Example expressions: 2+2 1/2 1024/16 (1/3 + 10 - 10) * 3 2 ^ 64 scale=5;pi=4*a(1);pi x=3;y=4;z=sqrt(x^2+y^2);z
Automatically, you should be able to double click and choose install.
Manually, you can put the Service at ~/Library/Services/ (current user only) or /Library/Services/ (for all users).
Optionally, assign a shortcut key through System Preferences.
Double click a Service to edit it using Automator.
12 December: Added Duplicate Image As JPG/PNG (1.00)
30 August: Updated Delete Resource Fork for recent OS X changes (1.20)
27 January: Added Use image as Desktop Picture (1.00)
15 November: Added GZip Individual Files (1.00)
10 October: Added Delete Data Fork (1.10) and updated Delete Resource Fork (1.10) - both preserve the file modified date
28 July: Added Convert Image to JPG/PNG (1.00)
26 July: Added Zip Individual Files (1.00)
05 May: Added Open current Safari page in Google Chrome (1.00)
02 October: Added Delete Resource Fork (1.00)
29 August: Updated Calculate & Append (1.01), Calculate & Replace (1.01), Calculate & Speak (1.04) to remove trailing zeros. Calculate & Speak now speaks more English (1.05)
28 August: Introduced Calculate & Append (1.00), Calculate & Replace (1.00), Calculate & Speak (1.03)
Mac OS X Automation by Apple’s Sal Soghoian
How to create a Service to sort paragraphs of text
man bc the calculator used by the services