<snapdata remixID="14895274"><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 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 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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