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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Empty-string/CoffeeScript/empty-string.coffee Normal file
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isEmptyString = (s) ->
# Returns true iff s is an empty string.
# (This returns false for non-strings as well.)
return true if s instanceof String and s.length == 0
s == ''
empties = ["", '', new String()]
non_empties = [new String('yo'), 'foo', {}]
console.log (isEmptyString(v) for v in empties) # [true, true, true]
console.log (isEmptyString(v) for v in non_empties) # [false, false, false]
console.log (s = '') == "" # true
console.log new String() == '' # false, due to underlying JavaScript's distinction between objects and primitives