This program uses Middleman and JavaScript to display a functional calculator
##Requirements##
- Ruby v2.2.2
- Ubuntu 14.04 LTS
- Mozilla Firefox
- The 'middleman' gem
//To install required gem, do:
$ gem install middleman
//The installation process will add one new command to your environment/directory, with features you can use:
$ middleman init
$ middleman server
$ middleman build
NOTE:
- This has only been tested with the above requirements. Other operating systems and other versions of Ruby may also work.
##Starting the Program## To run the program, do:
$ cd <path/to/JavaScriptCalculator/>
$ ruby run.rb
After running run.rb, the program will begin
- Changes can be viewed live while editing /DavisSiteUpgrade/source/*.html.erb
##Use##
###Entering Expressions### This calculator allows you to enter expressions as a whole string such as:
1 + 6 x 4 - 3
As a user, you can expect the calculator to complete the calculation using the standard order of operations, PEMDAS.
###Powers###
To calculate the result of a number to the power of another number, you must use the exp button. First press the button then pow( will appear on the screen, then enter the base followed by a comma, then enter the exponent followed by a closed parenthese. The exponent can be a part of any expression and will still be properly evaluated.
x^y => pow(x,y)
###Root###
To calculate a root of a number, you must use the √ button. First press the button then sqrt( will appear on the screen, then enter the number whose root you want to take followed by a comma, then enter the root followed by a closed parenthese. The sqrt() function can be a part of any expression and will still be properly evaluated.
x√y => sqrt(y,x)
###π### To use π (pi), simply press the button with the pi symbol on it.
Valid: 2*pi
Invalid: 2pi
###Trig Functions### All three trig functions - Sine, Cosine, and Tangent - are calculated in radians.
###Memory Functions###
- MS will save current result to memory
- MC will reset the number in memory to 0
- M+ will add the current result to the number in memory
- MR will display the number in memory to screen
##Limitations##
Due to JavaScript only allowing floating point arithmetic, operations such as 1.2 - 1.1 will have results such as 0.09999999999999987 instead of 0.1 which is a known limitation of javascript.
##Debugging## If firefox opens but the page does not load, check the terminal and look for something like the following:
== The Middleman uses a different port "<some number>" then the configured one "4567" because some other server is listening on that port.
== View your site at "http://VirtualBox.local:<some number>", "http://10.0.2.15:<some number>"
Follow the instructions and type http://VirtualBox.local:<some number> into your browser to view the page.
##Sources## CSS3 3D Button - http://www.paulund.co.uk