<snapdata remixID="14981083"><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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