mirror of
https://github.com/jashkenas/coffeescript.git
synced 2022-11-09 12:23:24 -05:00
131 lines
2.2 KiB
CoffeeScript
131 lines
2.2 KiB
CoffeeScript
x: 1
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y: {}
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y.x: -> 3
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ok x is 1
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ok typeof(y.x) is 'function'
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ok y.x instanceof Function
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ok y.x() is 3
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ok y.x.name is 'x'
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# The empty function should not cause a syntax error.
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->
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() ->
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# Multiple nested function declarations mixed with implicit calls should not
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# cause a syntax error.
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(one) -> (two) -> three four, (five) -> six seven, eight, (nine) ->
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obj: {
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name: "Fred"
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bound: ->
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(=> ok(this.name is "Fred"))()
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unbound: ->
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(-> ok(!this.name?))()
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}
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obj.unbound()
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obj.bound()
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# Python decorator style wrapper that memoizes any function
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memoize: (fn) ->
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cache: {}
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self: this
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(args...) ->
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key: args.toString()
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return cache[key] if cache[key]
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cache[key] = fn.apply(self, args)
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Math: {
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Add: (a, b) -> a + b
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AnonymousAdd: ((a, b) -> a + b)
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FastAdd: memoize (a, b) -> a + b
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}
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ok Math.Add(5, 5) is 10
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ok Math.AnonymousAdd(10, 10) is 20
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ok Math.FastAdd(20, 20) is 40
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# Parens are optional on simple function calls.
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ok 100 > 1 if 1 > 0
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ok true unless false
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ok true for i in [1..3]
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ok_func: (f) -> ok(f())
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ok_func -> true
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# Optional parens can be used in a nested fashion.
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call: (func) -> func()
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result: call ->
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inner: call ->
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Math.Add(5, 5)
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ok result is 10
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# More fun with optional parens.
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fn: (arg) -> arg
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ok fn(fn {prop: 101}).prop is 101
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# Multi-blocks with optional parens.
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result: fn( ->
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fn ->
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"Wrapped"
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)
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ok result()() is 'Wrapped'
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# And even with strange things like this:
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funcs: [((x) -> x), ((x) -> x * x)]
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result: funcs[1] 5
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ok result is 25
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result: ("hello".slice) 3
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ok result is 'lo'
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# And with multiple single-line functions on the same line.
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func: (x) -> (x) -> (x) -> x
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ok func(1)(2)(3) is 3
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# Ensure that functions with the same name don't clash with helper functions.
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del: -> 5
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ok del() is 5
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# Ensure that functions can have a trailing comma in their argument list
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mult: (x, mids..., y) ->
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x: * n for n in mids
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x: * y
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ok mult(1, 2,) is 2
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ok mult(1, 2, 3,) is 6
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ok mult(10,[1..6]...,) is 7200
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# Test for inline functions with parentheses and implicit calls.
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combine: (func, num) -> func() * num
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result: combine (-> 1 + 2), 3
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ok result is 9
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# Test for calls/parens/multiline-chains.
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f: (x) -> x
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result: (f 1).toString()
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.length
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ok result is 1
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