<snapdata remixID="13992353"><project name="U3L1-ShoppingList_Empty to Students" app="Snap! 10.1-dev, https://snap.berkeley.edu" version="2"><notes></notes><thumbnail>data:image/png;base64,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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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