giles
073ea44fdb
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Two-pointer palindrome check:
let is_palindrome s =
let n = String.length s in
let rec check i j =
if i >= j then true
else if s.[i] <> s.[j] then false
else check (i + 1) (j - 1)
in
check 0 (n - 1)
Tests on six strings:
racecar = true
hello = false
abba = true
'' = true (vacuously, i >= j on entry)
'a' = true
'ab' = false
Sum = 4.
Uses s.[i] <> s.[j] (string-get + structural inequality), recursive
2-arg pointer advancement, and a multi-clause if/else if/else for
the three cases.
48 baseline programs total.
53 lines
1.0 KiB
JSON
53 lines
1.0 KiB
JSON
{
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"anagrams.ml": 3,
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"bag.ml": 3,
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"bits.ml": 21,
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"balance.ml": 3,
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"bfs.ml": 6,
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"btree.ml": 39,
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"brainfuck.ml": 75,
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"caesar.ml": 215,
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"calc.ml": 13,
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"closures.ml": 315,
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"coin_change.ml": 6,
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"csv.ml": 10,
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"exception_handle.ml": 4,
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"expr_eval.ml": 16,
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"factorial.ml": 3628800,
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"fraction.ml": 7,
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"frequency.ml": 5,
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"grep_count.ml": 3,
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"hanoi.ml": 1023,
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"fizzbuzz.ml": 57,
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"list_ops.ml": 30,
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"json_pretty.ml": 24,
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"kadane.ml": 6,
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"lambda_calc.ml": 7,
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"levenshtein.ml": 11,
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"memo_fib.ml": 75025,
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"merge_sort.ml": 44,
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"module_use.ml": 3,
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"newton_sqrt.ml": 1414,
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"mutable_record.ml": 10,
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"option_match.ml": 5,
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"palindrome.ml": 4,
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"pascal.ml": 252,
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"pi_leibniz.ml": 314,
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"pretty_table.ml": 64,
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"poly_stack.ml": 5,
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"queens.ml": 2,
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"quicksort.ml": 44,
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"roman.ml": 44,
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"rpn.ml": 9,
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"run_length.ml": 11,
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"safe_div.ml": 20,
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"shuffle.ml": 55,
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"word_freq.ml": 8,
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"sieve.ml": 15,
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"sum_squares.ml": 385,
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"validate.ml": 417,
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"word_count.ml": 3
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}
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