Adds up time, where "time" is { hours : Number, minutes: Number }. Read tests to see how this can be used programatically. Also try adding up your work hours in the REPL.

Alternatives

• raine/tunnit -- simple time tracking tool that calculates number of hours for a text file (given the text file with time ranges)
• substack/clocker -- time tracking right in your command line. pipe the output report to substack/invoicer to generate a fancy invoice.pdf file.
• csvwolf/time-calculate -- manipulate Date objects: add time ({D: Number, h: Number, m: Number ...}), subsctract time, get diff time object from two Dates