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<!DOCTYPE html>
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<title>SmallBASIC | SELF</title>
<meta name="description" content="Pseudo class instance variable">
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<p>Pseudo class instance variable</p>
<p>The SELF variable works with MAP variables. You can assign a
reference to a FUNC or SUB to a MAP variable. When you call the SUB or
FUNC the SELF variable provides access to values from the enclosing MAP
variable. This provides pseudo class/object functionality.</p>
<p>Note: ‘MAP’ is the name given to the dictionary/hashmap variable
variant.</p>
<h3 id="example-1-self-and-map-variable">Example 1: SELF and MAP
variable</h3>
<div class="sourceCode" id="cb1"><pre
class="sourceCode smallbasic"><code class="sourceCode smallbasic"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="kw">SUB </span>hello</span>
<span id="cb1-2"><a href="#cb1-2" aria-hidden="true" tabindex="-1"></a> <span class="kw">print</span> <span class="st">"hello "</span> + <span class="dt">self</span>.world</span>
<span id="cb1-3"><a href="#cb1-3" aria-hidden="true" tabindex="-1"></a><span class="kw">END</span></span>
<span id="cb1-4"><a href="#cb1-4" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb1-5"><a href="#cb1-5" aria-hidden="true" tabindex="-1"></a>a.world = <span class="st">"world"</span></span>
<span id="cb1-6"><a href="#cb1-6" aria-hidden="true" tabindex="-1"></a>a.foo = @hello</span>
<span id="cb1-7"><a href="#cb1-7" aria-hidden="true" tabindex="-1"></a>a.foo()</span></code></pre></div>
<h3 id="example-2-simple-class">Example 2: Simple Class</h3>
<div class="sourceCode" id="cb2"><pre
class="sourceCode smallbasic"><code class="sourceCode smallbasic"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="kw">func </span>SimpleClass(i)</span>
<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb2-3"><a href="#cb2-3" aria-hidden="true" tabindex="-1"></a> <span class="kw">sub </span>Increment(i)</span>
<span id="cb2-4"><a href="#cb2-4" aria-hidden="true" tabindex="-1"></a> <span class="dt">self</span>.x = <span class="dt">self</span>.x + i</span>
<span id="cb2-5"><a href="#cb2-5" aria-hidden="true" tabindex="-1"></a> <span class="kw">end</span></span>
<span id="cb2-6"><a href="#cb2-6" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb2-7"><a href="#cb2-7" aria-hidden="true" tabindex="-1"></a> <span class="kw">sub </span>Decrement(i)</span>
<span id="cb2-8"><a href="#cb2-8" aria-hidden="true" tabindex="-1"></a> <span class="dt">self</span>.x = <span class="dt">self</span>.x - i</span>
<span id="cb2-9"><a href="#cb2-9" aria-hidden="true" tabindex="-1"></a> <span class="kw">end</span></span>
<span id="cb2-10"><a href="#cb2-10" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb2-11"><a href="#cb2-11" aria-hidden="true" tabindex="-1"></a> <span class="kw">func </span>GetX()</span>
<span id="cb2-12"><a href="#cb2-12" aria-hidden="true" tabindex="-1"></a> <span class="kw">return</span> <span class="dt">self</span>.x</span>
<span id="cb2-13"><a href="#cb2-13" aria-hidden="true" tabindex="-1"></a> <span class="kw">end</span></span>
<span id="cb2-14"><a href="#cb2-14" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb2-15"><a href="#cb2-15" aria-hidden="true" tabindex="-1"></a> <span class="dt">local</span> temp</span>
<span id="cb2-16"><a href="#cb2-16" aria-hidden="true" tabindex="-1"></a> temp.x = i</span>
<span id="cb2-17"><a href="#cb2-17" aria-hidden="true" tabindex="-1"></a> temp.Increment = @Increment</span>
<span id="cb2-18"><a href="#cb2-18" aria-hidden="true" tabindex="-1"></a> temp.Decrement = @Decrement</span>
<span id="cb2-19"><a href="#cb2-19" aria-hidden="true" tabindex="-1"></a> temp.GetX = @GetX</span>
<span id="cb2-20"><a href="#cb2-20" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb2-21"><a href="#cb2-21" aria-hidden="true" tabindex="-1"></a> <span class="kw">return</span> temp</span>
<span id="cb2-22"><a href="#cb2-22" aria-hidden="true" tabindex="-1"></a><span class="kw">end</span></span>
<span id="cb2-23"><a href="#cb2-23" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb2-24"><a href="#cb2-24" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb2-25"><a href="#cb2-25" aria-hidden="true" tabindex="-1"></a>A = SimpleClass(<span class="dv">1</span>)</span>
<span id="cb2-26"><a href="#cb2-26" aria-hidden="true" tabindex="-1"></a><span class="kw">print</span> A.GetX()</span>
<span id="cb2-27"><a href="#cb2-27" aria-hidden="true" tabindex="-1"></a>A.Increment(<span class="dv">5</span>) : <span class="kw">print</span> A.GetX()</span>
<span id="cb2-28"><a href="#cb2-28" aria-hidden="true" tabindex="-1"></a>A.Decrement(<span class="dv">4</span>) : <span class="kw">print</span> A.GetX()</span></code></pre></div>
<div class="lavenderBox">
<div class="header">Code samples using SELF</div>
<div class="linklist">
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 3/2048.bas">2048.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/graphics 1/3d_torus.bas">3d_torus.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/graphics 2/3dtorus.bas">3dtorus.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 1/7gables.bas">7gables.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 1/betrayal: crows ii.bas">betrayal: crows ii.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 3/checkers.bas">checkers.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 3/chess.bas">chess.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 1/dogstar5.bas">dogstar5.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/applications/Eliza.bas">Eliza.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 1/eliza.bas">eliza.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 3/heap.bas">heap.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/network/irc-bot.bas">irc-bot.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 3/klotski_solver.bas">klotski_solver.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/graphics 4/lissajous2.bas">lissajous2.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/applications/palm_cli.bas">palm_cli.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/system/palmcli.bas">palmcli.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/sound/scales132.bas">scales132.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/graphics 1/selfdefinedsymbols.bas">selfdefinedsymbols.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/misc/Misc Bpf/snake game v1.bas">snake game v1.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/graphics 4/snake.bas">snake.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 1/startrek.bas">startrek.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 3/startrek.bas">startrek.bas </a>
<a target="_github" href="https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/graphics 4/xmas_tree.bas">xmas_tree.bas </a>
</div>
</div>
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<div class="header">System</div>
<div class="linklist">
<a href="/reference/1439.html">CHAIN </a>
<a href="/reference/1521.html">COMMAND </a>
<a href="/reference/1522.html">CWD </a>
<a href="/reference/806.html">DELAY </a>
<a href="/reference/807.html">ENV </a>
<a href="/reference/815.html">ENV </a>
<a href="/reference/1443.html">EXEC </a>
<a href="/reference/1440.html">EXPORT </a>
<a href="/reference/606.html">FRE </a>
<a href="/reference/1525.html">HOME </a>
<a href="/reference/1441.html">IMPORT </a>
<a href="/reference/1462.html">INCLUDE </a>
<a href="/reference/1736.html">MAXINT </a>
<a href="/reference/1735.html">NIL </a>
<a href="/reference/1442.html">OPTION </a>
<a href="/reference/809.html">PAUSE </a>
<a href="/reference/1524.html">PI </a>
<a href="/reference/817.html">PROGLINE </a>
<a href="/reference/810.html">RANDOMIZE </a>
<a href="/reference/818.html">RUN </a>
<a href="/reference/1523.html">SBVER </a>
<a href="/reference/1734.html"><strong>SELF</strong> </a>
<a href="/reference/812.html">STKDUMP </a>
<a href="/reference/813.html">TROFF </a>
<a href="/reference/814.html">TRON </a>
<a href="/reference/1446.html">UNIT </a>
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This page was last edited on Thu, 3 Aug 2023 22:43:59 +0200
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