Feather Calculator

A calculator, with more features than you might expect...

It evaluates expressions using the Feather scripting language.

Usage

Type an expression, then press the friendly = button.

Only kidding, I never use the button, but it's handy as a reminder for the evaluatate keyboard shortcut.

The default is Ctrl+Enter (but you can change this if you want)

This evaluated the current line of text. To evaluate a block of code, or an expression which spans multiple lines :

Selected a block of text, then press the friendly = button (or Ctrl+Enter).

Runner Prefix

FeatherCalculator adds a = prefix for Runner, so that you can type any expression into a Runner input field.

I have a runner field slap bang in the middle of the main toolbar : i.e. My Personal project contains :

toolbar(
    spacer,
    Runner.runnerInput( projectFolder() )
)

Comparison with Traditional Calculators

The font is the same size as all the other text. Why do other computer calculator use such a HUGE font?

Type, rather than push buttons. Why do other computer calculators have buttons, when your keyboard already has them?

Now that we've de-cluttered the UI, we have lots more space, so why not show ALL lots of expressions, and their results.

The final result is a TEXT AREA. Each line is either an expression you have typed, or the result.

Not just Maths

As we have a complete scripting language, you can do more than just maths.

A silly example :

$(whoami).eval().trim() + " woz here"

This runs the command whoami, and appends some text.

FYI, I needed "trim()" to get rid of the newline character. Hmm.

To run a block of code, highlight the block, and press Ctrl+Enter. e.g. :

var sum = 0
for ( a in 0..10 ) {
    sum += a
}
sum

Blocks Without a Value

This currently doesn't work :

for ( a in 0..10 ) {
    println( "Hello" )
}

Because it gets confused by the lack of a return value. As a workaround until this is fixed, just add any value to the end. e.g. :

for ( a in 0..10 ) {
    println( "Hello" )
}
"Done" // or 0 or true ...

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