125 lines
1.9 KiB
HTML
125 lines
1.9 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of MoreLabels.Hashtbl.HashedType</TITLE>
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</HEAD><BODY>
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<H1>MoreLabels.Hashtbl.HashedType</H1>
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Section: OCaml library (3o)<BR>Updated: 2020-01-30<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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MoreLabels.Hashtbl.HashedType - no description
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<A NAME="lbAC"> </A>
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<H2>Module type</H2>
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Module type MoreLabels.Hashtbl.HashedType
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<A NAME="lbAD"> </A>
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<H2>Documentation</H2>
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<P>
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Module type
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<B>HashedType</B>
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<BR> =
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<B>Hashtbl.HashedType</B>
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<P>
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<P>
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<P>
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<P>
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<P>
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<P>
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<P>
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<I>type t </I>
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<P>
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<P>
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The type of the hashtable keys.
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<P>
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<P>
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<P>
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<I>val equal </I>
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:
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<B>t -> t -> bool</B>
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<P>
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The equality predicate used to compare keys.
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<P>
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<P>
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<P>
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<I>val hash </I>
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:
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<B>t -> int</B>
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<P>
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A hashing function on keys. It must be such that if two keys are
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equal according to
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<B>equal</B>
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, then they have identical hash values
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as computed by
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<B>hash</B>
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.
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Examples: suitable (
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<B>equal</B>
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,
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<B>hash</B>
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) pairs for arbitrary key
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types include
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<P>
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- (
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<B>(=)</B>
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,
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<B>Hashtbl.hash</B>
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) for comparing objects by structure
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(provided objects do not contain floats)
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<P>
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- (
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<B>(fun x y -> compare x y = 0)</B>
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,
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<B>Hashtbl.hash</B>
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)
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for comparing objects by structure
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and handling
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<B>nan</B>
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correctly
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<P>
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- (
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<B>(==)</B>
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,
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<B>Hashtbl.hash</B>
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) for comparing objects by physical
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equality (e.g. for mutable or cyclic objects).
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<P>
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<P>
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<P>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">Module type</A><DD>
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<DT id="3"><A HREF="#lbAD">Documentation</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:48 GMT, March 31, 2021
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</BODY>
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</HTML>
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