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<title>Embracing the C++ STL</title>
<meta name=Description content="4/2/2002: Checking for Empty Container">
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<div v:shape="_x0000_s378884" class=O style='mso-line-spacing:"100 50 0";
position:absolute;top:94.25%;left:8.42%;width:18.91%;height:2.25%'><span
style='font-size:42%'>GDC Roadtrip Dec 1999</span><span style='font-size:58%;
mso-special-format:lastCR;display:none'> </span></div>
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<div v:shape="_x0000_s523266" class=T style='position:absolute;top:9.5%;
left:3.55%;width:96.62%;height:10.0%'>Checking for Empty Container</div>
<div v:shape="_x0000_s523267" class=B><span style='position:absolute;
top:24.0%;left:12.17%;width:79.4%;height:7.5%'><span class=BB
style='position:absolute;left:-4.71%;top:.3em'>n</span>Write if (c.empty())
instead of if </span><span style='position:absolute;top:31.0%;left:12.17%;
width:79.4%;height:7.5%'>(c.size() == 0) </span>
<div style='position:absolute;top:39.5%;left:8.42%;width:90.26%;height:7.5%'><span
style='position:absolute;top:0%;left:4.14%;width:95.85%;height:100.0%'><span
class=BB style='position:absolute;left:-4.32%;top:.3em'>n</span>empty() is
guaranteed constant time </span></div>
<span style='position:absolute;top:48.0%;left:12.17%;width:89.88%;height:7.5%'><span
class=BB style='position:absolute;left:-4.16%;top:.3em'>n</span>size() is not
guaranteed constant time </span><span style='position:absolute;top:55.25%;
left:12.17%;width:91.38%;height:7.5%'>(it usually is, but not always, e.g.
lists)</span></div>
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