<snapdata remixID="14083546"><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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</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 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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 %&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" category="control"><header></header><code></code><translations></translations><inputs><input type="%boolUE"></input><input type="%cs"></input></inputs><script><block s="doDeclareVariables"><list><l>breakpoint</l></list></block><block s="doIf"><block s="evaluate"><block var="test"/><list></list></block><script><block s="doSetVar"><l>breakpoint</l><block var="test"/></block><block s="doShowVar"><l>breakpoint</l></block><block s="doRun"><block var="action"/><list></list></block><block s="doPauseAll"></block><block s="doHideVar"><l></l></block></script><list></list></block></script></block-definition><block-definition s="word $arrowRight list %&apos;word&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="word"/><l><option>letter</option></l></block></block></script></block></script></block-definition><block-definition s="ignore %&apos;x&apos;" type="command" category="control"><header></header><code></code><translations></translations><inputs><input type="%s"></input></inputs></block-definition><block-definition s="tell %&apos;sprite&apos; to %&apos;commands&apos;" type="command" category="sensing"><header></header><code></code><translations></translations><inputs><input type="%txt">Sprite</input><input type="%cs"></input></inputs><script><block s="doRun"><block s="reportAttributeOf"><block var="commands"/><block var="sprite"/></block><list></list></block></script></block-definition><block-definition s="ask for %&apos;reporter&apos; from %&apos;sprite&apos;" type="reporter" category="sensing"><header></header><code></code><translations></translations><inputs><input type="%repRing"></input><input type="%txt">Sprite</input></inputs><script><block s="doReport"><block 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