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# Functions:
square = (x) -> x * x
sum = (x, y) -> x + y
odd = (x) -> x % 2 isnt 0
even = (x) -> x % 2 is 0
run_loop = ->
fire_events((e) -> e.stopPropagation())
listen()
wait()
# Objects:
dense_object_literal = {one: 1, two: 2, three: 3}
spaced_out_multiline_object =
pi: 3.14159
list: [1, 2, 3, 4]
regex: /match[ing](every|thing|\/)/gi
three: new Idea
inner_obj:
freedom: -> _.freedom()
# Arrays:
stooges = [{moe: 45}, {curly: 43}, {larry: 46}]
exponents = [((x) -> x), ((x) -> x * x), ((x) -> x * x * x)]
empty = []
multiline = [
'line one'
'line two'
]
# Conditionals and ternaries.
if submarine.shields_up
full_speed_ahead()
fire_torpedos()
else if submarine.sinking
abandon_ship()
else
run_away()
eldest = if 25 > 21 then liz else marge
decoration = medal_of_honor if war_hero
go_to_sleep() unless coffee
# Returning early:
race = ->
run()
walk()
crawl()
if tired then return sleep()
race()
# Conditional assignment:
good or= evil
wine and= cheese
# Nested property access and calls.
((moon.turn(360))).shapes[3].move({x: 45, y: 30}).position['top'].offset('x')
a = b = c = 5
# Embedded JavaScript.
callback(
`function(e) { e.stop(); }`
)
# Try/Catch/Finally/Throw.
try
all_hell_breaks_loose()
dogs_and_cats_living_together()
throw "up"
catch error
print(error)
finally
clean_up()
try all_hell_breaks_loose() catch error then print(error) finally clean_up()
# While loops, break and continue.
while demand > supply
sell()
restock()
while supply > demand then buy()
loop
break if broken
continue if continuing
# Unary operators.
!!true
# Lexical scoping.
v_1 = 5
change_a_and_set_b = ->
v_1 = 10
v_2 = 15
v_2 = 20
# Array comprehensions.
supper = food.capitalize() for food in ['toast', 'cheese', 'wine']
drink bottle for bottle, i in ['soda', 'wine', 'lemonade'] when even i
# Switch statements ("else" serves as a default).
activity = switch day
when "Tuesday" then eat_breakfast()
when "Sunday" then go_to_church()
when "Saturday" then go_to_the_park()
when "Wednesday"
if day is bingo_day
go_to_bingo()
else
eat_breakfast()
go_to_work()
eat_dinner()
else go_to_work()
# Semicolons can optionally be used instead of newlines.
wednesday = -> eat_breakfast(); go_to_work(); eat_dinner()
# Array slice literals.
zero_to_nine = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
three_to_six = zero_to_nine[3..6]
# Multiline strings with inner quotes.
story = "Lorem ipsum dolor \"sit\" amet, consectetuer adipiscing elit,
sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna
aliquam erat volutpat. Ut wisi enim ad."
# Inheritance and calling super.
class Animal
constructor: (@name) ->
move: (meters) ->
alert this.name + " moved " + meters + "m."
class Snake extends Animal
move: ->
alert 'Slithering...'
super 5
class Horse extends Animal
move: ->
alert 'Galloping...'
super 45
sam = new Snake "Sammy the Snake"
tom = new Horse "Tommy the Horse"
sam.move()
tom.move()
# Numbers.
a_googol = 1e100
hex = 0xff0000
negative = -1.0
infinity = Infinity
nan = NaN
# Deleting.
delete secret.identity
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