<snapdata remixID="14911844"><project name="U3L1-ShoppingList_Empty to Students" app="Snap! 11.0.8, 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 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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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%mult%txt"><block var="data"/></custom-block></block></script></block></script></block-definition><block-definition s="sentence $arrowRight list %&apos;text&apos;" type="reporter" category="operators"><header></header><code></code><translations></translations><inputs><input type="%txt"></input></inputs><script><block s="doWarp"><script><block s="doReport"><block s="reportTextSplit"><block var="text"/><l><option>whitespace</option></l></block></block></script></block></script></block-definition><block-definition s="catch %&apos;tag&apos; %&apos;action&apos;" type="command" category="control"><header></header><code></code><translations></translations><inputs><input type="%upvar"></input><input type="%cs"></input></inputs><script><block s="doCallCC"><block s="reifyScript"><script><block s="doSetVar"><l>tag</l><block var="cont"/></block><block s="doRun"><block var="action"/><list></list></block></script><list><l>cont</l></list></block></block></script></block-definition><block-definition s="throw %&apos;cont&apos;" type="command" category="control"><header></header><code></code><translations></translations><inputs><input type="%s">catchtag</input></inputs><script><block s="doRun"><block var="cont"/><list></list></block></script></block-definition><block-definition s="catch %&apos;tag&apos; %&apos;value&apos;" type="reporter" category="control"><header></header><code></code><translations></translations><inputs><input type="%upvar"></input><input type="%anyUE"></input></inputs><script><block s="doCallCC"><block s="reifyScript"><script><block s="doSetVar"><l>tag</l><block var="cont"/></block><block s="doReport"><block s="evaluate"><block var="value"/><list></list></block></block></script><list><l>cont</l></list></block></block></script></block-definition><block-definition s="throw %&apos;tag&apos; %&apos;value&apos;" type="command" category="control"><header></header><code></code><translations></translations><inputs><input type="%s">catchtag</input><input 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