<snapdata remixID="15097387"><project name="U3L1-ShoppingList_Empty to Students" app="Snap! 11.0.8, https://snap.berkeley.edu" version="2"><notes></notes><thumbnail>data:image/png;base64,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</thumbnail><scenes select="1"><scene name="U3L1-ShoppingList_Empty to Students"><notes></notes><hidden></hidden><headers></headers><code></code><blocks><block-definition s="map %&apos;function&apos; over %&apos;lists&apos;" type="reporter" category="lists"><header></header><code></code><translations></translations><inputs><input type="%repRing"></input><input type="%mult%l"></input></inputs><script><block s="doWarp"><script><block s="doDeclareVariables"><list><l>mapone</l><l>mapmany</l></list></block><block s="doSetVar"><l>mapone</l><block s="reifyScript"><script><block s="doIf"><custom-block s="empty? %l"><block var="data"/></custom-block><script><block s="doReport"><block s="reportNewList"><list></list></block></block></script><list></list></block><block s="doReport"><block s="reportCONS"><block s="evaluate"><block var="function"/><list><block s="reportListItem"><l>1</l><block var="data"/></block></list></block><block s="evaluate"><block var="mapone"/><list><block s="reportCDR"><block 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lists"/></list></custom-block></list></block></block></block></script><list><l>data lists</l></list></block></block><block s="doIfElse"><custom-block s="empty? %l"><block s="reportCDR"><block var="lists"/></block></custom-block><script><block s="doReport"><block s="evaluate"><block var="mapone"/><list><block s="reportListItem"><l>1</l><block var="lists"/></block></list></block></block></script><script><block s="doReport"><block s="evaluate"><block var="mapmany"/><list><block var="lists"/></list></block></block></script></block></script></block></script></block-definition><block-definition s="empty? %&apos;data&apos;" type="predicate" category="lists"><header></header><code></code><translations></translations><inputs><input type="%l"></input></inputs><script><block s="doReport"><block s="reportVariadicEquals"><list><block var="data"/><block s="reportNewList"><list></list></block></list></block></block></script></block-definition><block-definition s="keep items such that 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var="data"/></block></custom-block></block></script></block></script></block></script></block-definition><block-definition s="combine with %&apos;function&apos; items of %&apos;data&apos;" type="reporter" category="lists"><header></header><code></code><translations></translations><inputs><input type="%repRing"></input><input type="%l"></input></inputs><script><block s="doWarp"><script><block s="doIf"><custom-block s="empty? %l"><block s="reportCDR"><block var="data"/></block></custom-block><script><block s="doReport"><block s="reportListItem"><l>1</l><block var="data"/></block></block></script><list></list></block><block s="doReport"><block s="evaluate"><block var="function"/><list><block s="reportListItem"><l>1</l><block var="data"/></block><custom-block s="combine with %repRing items of %l"><block var="function"/><block s="reportCDR"><block var="data"/></block></custom-block></list></block></block></script></block></script></block-definition><block-definition s="if %&apos;test&apos; 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s="throw %&apos;cont&apos;" type="command" category="control"><header></header><code></code><translations></translations><inputs><input type="%s">catchtag</input></inputs><script><block s="doRun"><block var="cont"/><list></list></block></script></block-definition><block-definition s="catch %&apos;tag&apos; %&apos;value&apos;" type="reporter" category="control"><header></header><code></code><translations></translations><inputs><input type="%upvar"></input><input type="%anyUE"></input></inputs><script><block s="doCallCC"><block s="reifyScript"><script><block s="doSetVar"><l>tag</l><block var="cont"/></block><block s="doReport"><block s="evaluate"><block var="value"/><list></list></block></block></script><list><l>cont</l></list></block></block></script></block-definition><block-definition s="throw %&apos;tag&apos; %&apos;value&apos;" type="command" category="control"><header></header><code></code><translations></translations><inputs><input type="%s">catchtag</input><input 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var="word"/><l><option>letter</option></l></block></block></script></block></script></block-definition><block-definition s="ignore %&apos;x&apos;" type="command" category="control"><header></header><code></code><translations></translations><inputs><input type="%s"></input></inputs></block-definition><block-definition s="tell %&apos;sprite&apos; to %&apos;commands&apos;" type="command" category="sensing"><header></header><code></code><translations></translations><inputs><input type="%txt">Sprite</input><input type="%cs"></input></inputs><script><block s="doRun"><block s="reportAttributeOf"><block var="commands"/><block var="sprite"/></block><list></list></block></script></block-definition><block-definition s="ask for %&apos;reporter&apos; from %&apos;sprite&apos;" type="reporter" category="sensing"><header></header><code></code><translations></translations><inputs><input type="%repRing"></input><input type="%txt">Sprite</input></inputs><script><block s="doReport"><block s="evaluate"><block s="reportAttributeOf"><block var="reporter"/><block var="sprite"/></block><list></list></block></block></script></block-definition><block-definition s="tell %&apos;sprite&apos; %&apos;action&apos;" type="command" category="control"><header></header><code></code><translations></translations><inputs><input type="%s">Sprite</input><input type="%cs"></input></inputs><script><block s="doRun"><block s="reportAttributeOf"><block var="action"/><block var="sprite"/></block><list></list></block></script></block-definition><block-definition s="ask %&apos;sprite&apos; %&apos;expression&apos;" type="reporter" category="control"><header></header><code></code><translations></translations><inputs><input type="%s">Sprite</input><input type="%repRing"></input></inputs><script><block s="doReport"><block s="evaluate"><block s="reportAttributeOf"><block var="expression"/><block var="sprite"/></block><list></list></block></block></script></block-definition><block-definition s="clicked" 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