Longest common prefix: Difference between revisions
Content added Content deleted
(add a test case where one string is a prefix of another to test what happens when zipping different-length strings that are the same until one ends) |
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lcp(<math>\emptyset</math>) = <math>\varepsilon</math> |
lcp(<math>\emptyset</math>) = <math>\varepsilon</math> |
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lcp("prefix","suffix") = <math>\varepsilon</math> |
lcp("prefix","suffix") = <math>\varepsilon</math> |
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lcp("foo","foobar") = "foo" |
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''Task inspired by this stackoverflow question'': [http://stackoverflow.com/questions/1916218/find-the-longest-common-starting-substring-in-a-set-of-strings Find the longest common starting substring in a set of strings] |
''Task inspired by this stackoverflow question'': [http://stackoverflow.com/questions/1916218/find-the-longest-common-starting-substring-in-a-set-of-strings Find the longest common starting substring in a set of strings] |
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nil, |
nil, |
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{"prefix", "suffix"}, |
{"prefix", "suffix"}, |
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{"foo", "foobar"}, |
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} { |
} { |
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fmt.Printf("lcp(%q) = %q\n", l, lcp(l)) |
fmt.Printf("lcp(%q) = %q\n", l, lcp(l)) |
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lcp([]) = "" |
lcp([]) = "" |
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lcp(["prefix" "suffix"]) = "" |
lcp(["prefix" "suffix"]) = "" |
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lcp(["foo" "foobar"]) = "foo" |
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</pre> |
</pre> |
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use Test; |
use Test; |
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plan |
plan 8; |
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is lcp("interspecies","interstellar","interstate"), "inters"; |
is lcp("interspecies","interstellar","interstate"), "inters"; |
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is lcp(''), ''; |
is lcp(''), ''; |
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is lcp(), ''; |
is lcp(), ''; |
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is lcp("prefix","suffix"), ''; |
is lcp("prefix","suffix"), ''; |
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is lcp("foo","foobar"), 'foo';</lang> |
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{{out}} |
{{out}} |
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<pre>1.. |
<pre>1..8 |
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ok 1 - |
ok 1 - |
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ok 2 - |
ok 2 - |
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ok 5 - |
ok 5 - |
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ok 6 - |
ok 6 - |
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ok 7 - |
ok 7 - |
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ok 8 - </pre> |
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=={{header|PL/I}}== |
=={{header|PL/I}}== |
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assert lcp("cheese") == "cheese" |
assert lcp("cheese") == "cheese" |
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assert lcp("") == "" |
assert lcp("") == "" |
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assert lcp("prefix","suffix") == "" |
assert lcp("prefix","suffix") == "" |
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assert lcp("foo","foobar") == "foo"</lang> |
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===Python: Functional=== |
===Python: Functional=== |
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assert lcp("cheese") == "cheese" |
assert lcp("cheese") == "cheese" |
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assert lcp("") == "" |
assert lcp("") == "" |
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assert lcp("prefix","suffix") == "" |
assert lcp("prefix","suffix") == "" |
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assert lcp("foo","foobar") == "foo"</lang> |
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The above runs without output. |
The above runs without output. |
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