33 lines
1.3 KiB
Plaintext
33 lines
1.3 KiB
Plaintext
CMPH FAQ
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- How do I define the ids of the keys?
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- You don't. The ids will be assigned by the algorithm creating the minimal
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perfect hash function. If the algorithm creates an **ordered** minimal
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perfect hash function, the ids will be the indices of the keys in the
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input. Otherwise, you have no guarantee of the distribution of the ids.
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- Why do I always get the error "Unable to create minimum perfect hashing function"?
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- The algorithms do not guarantee that a minimal perfect hash function can
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be created. In practice, it will always work if your input
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is big enough (>100 keys).
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The error is probably because you have duplicated
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keys in the input. You must guarantee that the keys are unique in the
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input. If you are using a UN*X based OS, try doing
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``` #sort input.txt | uniq > input_uniq.txt
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and run cmph with input_uniq.txt
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- Why do I change the hash function using cmph_config_set_hashfuncs function and the default (jenkins)
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one is executed?
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- Probably you are you using the cmph_config_set_algo function after
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the cmph_config_set_hashfuncs. Therefore, the default hash function
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is reset when you call the cmph_config_set_algo function.
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----------------------------------------
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[Home index.html]
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----------------------------------------
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%!include: FOOTER.t2t
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