<snapdata remixID="13144949"><project name="U3L1-ShoppingList_Empty to Students" app="Snap! 9.0, 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 var="data"/></block></list></block></block></block></script><list><l>data</l></list></block></block><block s="doSetVar"><l>mapmany</l><block s="reifyScript"><script><block s="doIf"><custom-block s="empty? %l"><block s="reportListItem"><l>1</l><block var="data lists"/></block></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"/><custom-block s="map %repRing over %mult%l"><block s="reifyReporter"><autolambda><block s="reportListItem"><l>1</l><l/></block></autolambda><list></list></block><list><block var="data lists"/></list></custom-block></block><block s="evaluate"><block var="mapmany"/><list><custom-block s="map %repRing over %mult%l"><block s="reifyReporter"><autolambda><block s="reportCDR"><l/></block></autolambda><list></list></block><list><block var="data 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 %&apos;pred&apos; from %&apos;data&apos;" type="reporter" category="lists"><header></header><code></code><translations></translations><inputs><input type="%predRing"></input><input type="%l"></input></inputs><script><block s="doWarp"><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="doIfElse"><block s="evaluate"><block var="pred"/><list><block s="reportListItem"><l>1</l><block var="data"/></block></list></block><script><block s="doReport"><block s="reportCONS"><block s="reportListItem"><l>1</l><block var="data"/></block><custom-block s="keep items such that %predRing from %l"><block var="pred"/><block s="reportCDR"><block var="data"/></block></custom-block></block></block></script><script><block s="doReport"><custom-block s="keep items such that %predRing from %l"><block var="pred"/><block s="reportCDR"><block 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