CoffeeScript Class Example for "private" variables

CloneTest.coffee

class CloneTest
    constructor: (options = {}) ->
        
        @default_options = {
            foo: false, bar: false, baz: false
        }
        
        $.extend(@default_options, options)

    getValues: ->
        return JSON.stringify(@default_options, null, 4)

    clone: (options = {}) ->
        return new CloneTest( $.extend({}, @default_options, options) )


obj_1 = new CloneTest()
console.log "============================ obj_1  ============================"
console.log "expected_values:", JSON.stringify({ foo: false, bar: false, baz: false}, null, 4)
console.log "----------------------------------------------------------------"
console.log "result_values: ", obj_1.getValues()


obj_2 = obj_1.clone(foo: true)
console.log "============================ obj_2  ============================"
console.log "expected_values:", JSON.stringify({ foo: true,  bar: false, baz: false}, null, 4)
console.log "----------------------------------------------------------------"
console.log "result_values: ", obj_2.getValues()


obj_3 = obj_1.clone(bar: true)
console.log "============================ obj_3  ============================"
console.log "expected_values:", JSON.stringify({ foo: false,  bar: true, baz: false}, null, 4)
console.log "----------------------------------------------------------------"
console.log "result_values: ", obj_3.getValues()