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

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<h2 id="sec:miscpreds"><a id="sec:4.43"><span class="sec-nr">4.43</span> <span class="sec-title">Miscellaneous</span></a></h2>

<a id="sec:miscpreds"></a>

<dl class="latex">
<dt class="pubdef"><a id="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 the `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 class="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 id="dwim_match/3"><strong>dwim_match</strong>(<var>+Atom1, 
+Atom2, -Difference</var>)</a></dt>
<dd class="defbody">
Equivalent to <a id="idx:dwimmatch2:1391"></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 id="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 to the Unix <code>csh</code> pattern 
matcher. The patterns are given below:

<p><table class="latex frame-void center">
<tr><td><code><code>?</code></code> </td><td>Matches one arbitrary 
character. </td></tr>
<tr><td><code><code>*</code></code> </td><td>Matches any number of 
arbitrary characters. </td></tr>
<tr><td><code>[ ... ]</code> </td><td>Matches one of the characters 
specified between the brackets. </td></tr>
<tr><td></td><td><code>&lt;<var>char1</var>&gt;-&lt;<var>char2</var>&gt;</code> 
indicates a range. </td></tr>
<tr><td><code>{...}</code> </td><td>Matches any of the patterns of the 
comma-separated list between the braces.</td></tr>
</table>

<p>Example:

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

</dd>
<dt class="pubdef"><a id="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 id="idx:sleep1:1392"></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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swi-prolog-nox 6.6.4-2ubuntu1 / usr / lib / swi-prolog / doc / Manual / miscpreds.html
