<snapdata remixID="11250044"><project name="U3L1-ShoppingList_Empty to Students" app="Snap! 7, 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></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></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="reportEquals"><block var="data"/><block s="reportNewList"><list></list></block></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></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></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 s="reportGreaterThan"><block 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