24 lines
2.1 KiB
HTML
24 lines
2.1 KiB
HTML
<html><head><object type="application/x-oleobject" classid="clsid:1e2a7bd0-dab9-11d0-b93a-00c04fc99f9e">
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<param name="Keyword" value="Join">
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</object><meta http-equiv="Content-Type" content="text/html; charset=windows-1251"><title></title><link rel="StyleSheet" href="../../../default.css"></head>
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<body>
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<H1>Ìåòîäû Join</H1><h2>Îïèñàíèå ìåòîäîâ</h2><p>Ìåòîäû ïðèâåäåíû äëÿ ïîñëåäîâàòåëüíîñòè <code><b>sequence of</b> T</code>.</p><table>
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<tr><td>
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<code><b>function </b>Join<TInner,Key,Res>(inner: <b>sequence of</b> TInner; outerKeySelector: T->Key; innerKeySelector: TInner->TKey; resultSelector: (T,TInner)->Res): <b>sequence of</b> Res;</code>
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<br> Îáúåäèíÿåò äâå ïîñëåäîâàòåëüíîñòè íà îñíîâå ñîïîñòàâëåíèÿ êëþ÷åé â òðåòüþ ïîñëåäîâàòåëüíîñòü. Ôóíêöèÿ resultSelector çàäà¸ò ïðîåêöèþ ýëåìåíòîâ äâóõ ïîñëåäîâàòåëüíîñòåé ñ îäèíàêîâûìè çíà÷åíèÿìè êëþ÷à â ýëåìåíò òðåòüåé ïîñëåäîâàòåëüíîñòè.
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</td></tr>
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<tr><td>
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<code><b>function </b>Join<TInner,Key,Res>(inner: <b>sequence of</b> TInner; outerKeySelector: T->Key; innerKeySelector: TInner->TKey; resultSelector: (T,TInner)->Res; comparer: System.Collections.Generic.IEqualityComparer<Key>): <b>sequence of</b> Res;</code>
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<br> Îáúåäèíÿåò äâå ïîñëåäîâàòåëüíîñòè íà îñíîâå ñîïîñòàâëåíèÿ êëþ÷åé â òðåòüþ ïîñëåäîâàòåëüíîñòü. Ôóíêöèÿ resultSelector çàäà¸ò ïðîåêöèþ ýëåìåíòîâ äâóõ ïîñëåäîâàòåëüíîñòåé ñ îäèíàêîâûìè çíà÷åíèÿìè êëþ÷à â ýëåìåíò òðåòüåé ïîñëåäîâàòåëüíîñòè. Äëÿ ñðàâíåíèÿ êëþ÷åé èñïîëüçóåòñÿ êîìïàðàòîð comparer.
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</td></tr>
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</table>
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<h2>Ïðèìåð </h2><blockquote><code><strong>begin</strong><br> <strong>var</strong>
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people := Arr((1,'Èâàíîâ'),(2,'Ïîïîâ'),(3,'Ñèäîðîâ'));<br> <strong>var</strong>
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subjects := Arr((1,'Èñòîðèÿ'),(1,'Ìàòåìàòèêà'),(2,'Èñòîðèÿ')<br>
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,(3,'Ìàòåìàòèêà'),(1,'Ðóññêèé'),(2,'Ôèçèêà'));<br><br>
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people.Join(subjects,p->p[0],s->s[0],(p,s)->(p[1],s[1])).Println(NewLine);<br>
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<strong>end</strong>.<br><br>Âûâîä:<br>(Èâàíîâ,Èñòîðèÿ)<br>
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(Èâàíîâ,Ìàòåìàòèêà)<br>(Èâàíîâ,Ðóññêèé)<br>(Ïîïîâ,Èñòîðèÿ)<br>(Ïîïîâ,Ôèçèêà)<br>
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(Ñèäîðîâ,Ìàòåìàòèêà)</code></blockquote>
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</body>
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