<snapdata remixID="13397134"><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 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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 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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 s="reportVariadicGreaterThan"><list><block var="start"/><block var="end"/></list></block><script><block s="doSetVar"><l>step</l><l>-1</l></block><block s="doSetVar"><l>tester</l><block s="reifyReporter"><autolambda><block s="reportVariadicLessThan"><list><block var="i"/><block var="end"/></list></block></autolambda><list></list></block></block></script><script><block s="doSetVar"><l>step</l><l>1</l></block><block s="doSetVar"><l>tester</l><block s="reifyReporter"><autolambda><block s="reportVariadicGreaterThan"><list><block var="i"/><block var="end"/></list></block></autolambda><list></list></block></block></script></block><block s="doSetVar"><l>i</l><block var="start"/></block><block s="doUntil"><block s="evaluate"><block var="tester"/><list></list></block><script><block s="doRun"><block var="action"/><list></list></block><block s="doChangeVar"><l>i</l><block var="step"/></block></script></block></script></block-definition><block-definition s="join words %&apos;words&apos;" 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