<snapdata remixID="13146797"><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 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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mediaID="Search_cst_shopping-list-button-search"/><costume name="shopping-list-button-clear-list" center-x="53" center-y="15" 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