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good practice for parity checks

This commit is contained in:
Michael Ficarra 2010-10-26 11:35:23 -04:00
parent 7170536021
commit 0f577e0c94
1 changed files with 3 additions and 3 deletions
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6
test/test_comprehensions.coffee
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@ -1,5 +1,5 @@
# Basic array comprehensions.
nums = (n * n for n in [1, 2, 3] when n % 2 isnt 0)
nums = (n * n for n in [1, 2, 3] when n&1)
results = (n * 2 for n in nums)
ok results.join(',') is '2,18'
@ -8,7 +8,7 @@ ok results.join(',') is '2,18'
# Basic object comprehensions.
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)
odds = (prop + '!' for prop, value of obj when value&1)
ok names.join(' ') is "one! two! three!"
ok odds.join(' ') is "one! three!"
@ -27,7 +27,7 @@ eq "#{ x for x from 3*3 to 0*0 by 0-3 }", '9,6,3,0'
# Multiline array comprehension with filter.
evens = for num in [1, 2, 3, 4, 5, 6] when num % 2 is 0
evens = for num in [1, 2, 3, 4, 5, 6] when not (num&1)
num *= -1
num -= 2
num * -1