<snapdata remixID="13117173"><project name="U4 Code" 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="U4 Code"><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 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