<snapdata remixID="14275534"><project name="U3L1-ShoppingList_Empty to Students" app="Snap! 10.5.1, 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 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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