<snapdata remixID="14895178"><project name="U3L1-ShoppingList_Empty to Students" app="Snap! 11.0.8, https://snap.berkeley.edu" 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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;" type="reporter" category="operators"><header></header><code></code><translations></translations><inputs><input type="%mult%txt"></input></inputs><script><block s="doWarp"><script><block s="doIf"><custom-block s="empty? %l"><block s="reportCDR"><block var="words"/></block></custom-block><script><block s="doReport"><block s="reportListItem"><l>1</l><block var="words"/></block></block></script><list></list></block><block s="doReport"><block s="reportJoinWords"><list><block s="reportListItem"><l>1</l><block var="words"/></block><l> </l><custom-block s="join words %mult%txt"><block s="reportCDR"><block var="words"/></block></custom-block></list></block></block></script></block></script></block-definition><block-definition s="list $arrowRight sentence %&apos;data&apos;" type="reporter" category="operators"><header></header><code></code><translations></translations><inputs><input type="%l"></input></inputs><script><block s="doWarp"><script><block s="doReport"><custom-block s="join words 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