43 lines
1.0 KiB
CoffeeScript
43 lines
1.0 KiB
CoffeeScript
nums: n * n for n in [1, 2, 3] when n % 2 isnt 0
|
|
results: n * 2 for n in nums
|
|
|
|
ok results.join(',') is '2,18', 'basic array comprehension'
|
|
|
|
|
|
obj: {one: 1, two: 2, three: 3}
|
|
names: prop + '!' for prop of obj
|
|
odds: prop + '!' for prop, value of obj when value % 2 isnt 0
|
|
|
|
ok names.join(' ') is "one! two! three!", 'basic object comprehension'
|
|
ok odds.join(' ') is "one! three!", 'object comprehension with a filter'
|
|
|
|
|
|
evens: for num in [1, 2, 3, 4, 5, 6] when num % 2 is 0
|
|
num *= -1
|
|
num -= 2
|
|
num * -1
|
|
|
|
ok evens.join(', ') is '4, 6, 8', 'multiline array comprehension with filter'
|
|
|
|
|
|
ok 2 in evens, 'the in operator still works, standalone'
|
|
|
|
|
|
# Ensure that the closure wrapper preserves local variables.
|
|
obj: {}
|
|
|
|
methods: ['one', 'two', 'three']
|
|
|
|
for method in methods
|
|
name: method
|
|
obj[name]: ->
|
|
"I'm " + name
|
|
|
|
ok obj.one() is "I'm one"
|
|
ok obj.two() is "I'm two"
|
|
ok obj.three() is "I'm three"
|
|
|
|
|
|
array: [0..10]
|
|
ok(num % 2 is 0 for num in array by 2, 'naked ranges are expanded into arrays')
|