<snapdata remixID="14869115"><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 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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%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 type="%s"></input></inputs><script><block s="doRun"><block var="tag"/><list><block var="value"/></list></block></script></block-definition><block-definition s="for each %&apos;item&apos; of %&apos;data&apos; %&apos;action&apos;" type="command" category="lists"><header></header><code></code><translations></translations><inputs><input type="%upvar"></input><input type="%l"></input><input type="%cs"></input></inputs><script><block s="doUntil"><custom-block s="empty? %l"><block var="data"/></custom-block><script><block s="doSetVar"><l>item</l><block s="reportListItem"><l>1</l><block var="data"/></block></block><block s="doRun"><block var="action"/><list><block s="reportListItem"><l>1</l><block var="data"/></block></list></block><block s="doSetVar"><l>data</l><block s="reportCDR"><block var="data"/></block></block></script></block></script></block-definition><block-definition s="if %&apos;test&apos; do %&apos;action&apos; and pause all $pause-1-255-220-0" type="command" 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s="evaluate"><block s="reportAttributeOf"><block var="reporter"/><block var="sprite"/></block><list></list></block></block></script></block-definition><block-definition s="tell %&apos;sprite&apos; %&apos;action&apos;" type="command" category="control"><header></header><code></code><translations></translations><inputs><input type="%s">Sprite</input><input type="%cs"></input></inputs><script><block s="doRun"><block s="reportAttributeOf"><block var="action"/><block var="sprite"/></block><list></list></block></script></block-definition><block-definition s="ask %&apos;sprite&apos; %&apos;expression&apos;" type="reporter" category="control"><header></header><code></code><translations></translations><inputs><input type="%s">Sprite</input><input type="%repRing"></input></inputs><script><block s="doReport"><block s="evaluate"><block s="reportAttributeOf"><block var="expression"/><block var="sprite"/></block><list></list></block></block></script></block-definition><block-definition s="show 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