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Pangram checker: Difference between revisions
CoffeeScript
m (fix bare lang tags) |
(CoffeeScript) |
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Line 378:
(let [letters (into #{} "abcdefghijklmnopqrstuvwxyz")]
(= (->> s .toLowerCase (filter letters) (into #{})) letters)))</lang>
=={{header|CoffeeScript}}==
<lang coffeescript>
is_pangram = (s) ->
# This is optimized for longish strings--as soon as all 26 letters
# are encountered, we will be done. Our worst case scenario is a really
# long non-pangram, or a really long pangram with at least one letter
# only appearing toward the end of the string.
a_code = 'a'.charCodeAt(0)
required_letters = {}
for i in [a_code...a_code+26]
required_letters[String.fromCharCode(i)] = true
cnt = 0
for c in s
c = c.toLowerCase()
if required_letters[c]
cnt += 1
return true if cnt == 26
delete required_letters[c]
false
do ->
tests = [
["is this a pangram", false]
["The quick brown fox jumps over the lazy dog", true]
]
for test in tests
[s, exp_value] = test
throw Error("fail") if is_pangram(s) != exp_value
# try long strings
long_str = ''
for i in [1..500000]
long_str += s
throw Error("fail") if is_pangram(long_str) != exp_value
console.log "Passed tests: #{s}"
</lang>
=={{header|Common Lisp}}==
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