/usr/lib/swi-prolog/doc/Manual/miscpreds.html

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<H2><A NAME="sec:4.42"><SPAN class="sec-nr">4.42</SPAN> <SPAN class="sec-title">Miscellaneous</SPAN></A></H2>

<A NAME="sec:miscpreds"></A>

<DL class="latex">
<DT class="pubdef"><A NAME="dwim_match/2"><STRONG>dwim_match</STRONG>(<VAR>+Atom1, 
+Atom2</VAR>)</A></DT>
<DD class="defbody">
True if <VAR>Atom1</VAR> matches <VAR>Atom2</VAR> in `Do What I Mean' 
sense. Both <VAR>Atom1</VAR> and <VAR>Atom2</VAR> may also be integers 
or floats. The two atoms match if:
<UL COMPACT>
<LI>They are identical
<LI>They differ by one character (spy <VAR>==</VAR> spu)
<LI>One character is inserted/deleted (debug <VAR>==</VAR> deug)
<LI>Two characters are transposed (trace <VAR>==</VAR> tarce)
<LI>`Sub-words' are glued differently (existsfile <VAR>==</VAR> 
existsFile <VAR>==</VAR> exists_file)
<LI>Two adjacent sub words are transposed (existsFile <VAR>==</VAR> 
fileExists)
</UL>
</DD>
<DT class="pubdef"><A NAME="dwim_match/3"><STRONG>dwim_match</STRONG>(<VAR>+Atom1, 
+Atom2, -Difference</VAR>)</A></DT>
<DD class="defbody">
Equivalent to <A NAME="idx:dwimmatch2:1219"></A><A class="pred" href="miscpreds.html#dwim_match/2">dwim_match/2</A>, 
but unifies <VAR>Difference</VAR> with an atom identifying the 
difference between <VAR>Atom1</VAR> and <VAR>Atom2</VAR>. The return 
values are (in the same order as above): <CODE>equal</CODE>,
<CODE>mismatched_char</CODE>, <CODE>inserted_char</CODE>, <CODE>transposed_char</CODE>,
<CODE>separated</CODE> and <CODE>transposed_word</CODE>.
</DD>
<DT class="pubdef"><A NAME="wildcard_match/2"><STRONG>wildcard_match</STRONG>(<VAR>+Pattern, 
+String</VAR>)</A></DT>
<DD class="defbody">
True if <VAR>String</VAR> matches the wildcard pattern <VAR>Pattern</VAR>.
<VAR>Pattern</VAR> is very similar the Unix csh pattern matcher. The 
patterns are given below:

<P>
<CENTER>
<TABLE BORDER=0 FRAME=void RULES=groups>
<TR VALIGN=top><TD><CODE><CODE>?</CODE></CODE> </TD><TD>Matches one 
arbitrary character. </TD></TR>
<TR VALIGN=top><TD><CODE><CODE>*</CODE></CODE> </TD><TD>Matches any 
number of arbitrary characters. </TD></TR>
<TR VALIGN=top><TD><CODE>[ ... ]</CODE> </TD><TD>Matches one of the 
characters specified between the brackets. </TD></TR>
<TR VALIGN=top><TD></TD><TD><TT>&lt;<VAR>char1</VAR>&gt;-&lt;<VAR>char2</VAR>&gt;</TT> 
indicates a range. </TD></TR>
<TR VALIGN=top><TD><CODE>{...}</CODE> </TD><TD>Matches any of the 
patterns of the comma separated list between the braces.</TD></TR>
</TABLE>

</CENTER>

<P>Example:

<PRE class="code">
?- wildcard_match('[a-z]*.{pro,pl}[%~]', 'a_hello.pl%').

Yes
</PRE>

</DD>
<DT class="pubdef"><A NAME="sleep/1"><STRONG>sleep</STRONG>(<VAR>+Time</VAR>)</A></DT>
<DD class="defbody">
Suspend execution <VAR>Time</VAR> seconds. <VAR>Time</VAR> is either a 
floating point number or an integer. Granularity is dependent on the 
system's timer granularity. A negative time causes the timer to return 
immediately. On most non-realtime operating systems we can only ensure 
execution is suspended for <B>at least</B> <VAR>Time</VAR> seconds.

<P>On Unix systems the <A NAME="idx:sleep1:1220"></A><A class="pred" href="miscpreds.html#sleep/1">sleep/1</A> 
predicate is realised ---in order of preference--- by nanosleep(), 
usleep(), select() if the time is below 1 minute or sleep(). On Windows 
systems Sleep() is used.
</DD>
</DL>

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