Repeat a string: Difference between revisions
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(Added Erlang version) |
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=={{header|Erlang}}== |
=={{header|Erlang}}== |
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This example uses list comprehensions to accumulate N copies of X: |
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<lang erlang> |
<lang erlang> |
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repeat(X,N) -> |
repeat(X,N) -> |
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lists:flatten( |
lists:flatten(lists:duplicate(N,X)). |
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</lang> |
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This example uses lists:flatmap to do the same: |
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<lang erlang> |
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repeat(X,N) -> |
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lists:flatmap(fun (_) -> X end, lists:seq(1,N)). |
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</lang> |
</lang> |
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This will duplicate a string or character N times to produce a new string. |
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The first version also works for characters or any other values (though deeplists will all be flattened). The second version requires that X be a list, anything else will result in a bad argument exception. |
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=={{header|Factor}}== |
=={{header|Factor}}== |
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