<snapdata remixID="14868879"><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; then %&apos;true&apos; else %&apos;false&apos;" type="reporter" category="control"><header></header><code></code><translations></translations><inputs><input type="%b"></input><input type="%anyUE"></input><input type="%anyUE"></input></inputs><script><block s="doIfElse"><block var="test"/><script><block s="doReport"><block s="evaluate"><block var="true"/><list></list></block></block></script><script><block s="doReport"><block s="evaluate"><block var="false"/><list></list></block></block></script></block></script></block-definition><block-definition s="for %&apos;i&apos; = %&apos;start&apos; to %&apos;end&apos; %&apos;action&apos;" type="command" category="control"><header></header><code></code><translations></translations><inputs><input type="%upvar"></input><input type="%n">1</input><input type="%n">10</input><input type="%cs"></input></inputs><script><block s="doDeclareVariables"><list><l>step</l><l>tester</l></list></block><block s="doIfElse"><block 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