<snapdata remixID="14980314"><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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</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;" type="reporter" category="operators"><header></header><code></code><translations></translations><inputs><input type="%mult%txt"></input></inputs><script><block s="doWarp"><script><block s="doIf"><custom-block s="empty? %l"><block s="reportCDR"><block var="words"/></block></custom-block><script><block s="doReport"><block s="reportListItem"><l>1</l><block var="words"/></block></block></script><list></list></block><block s="doReport"><block s="reportJoinWords"><list><block s="reportListItem"><l>1</l><block var="words"/></block><l> </l><custom-block s="join words %mult%txt"><block s="reportCDR"><block var="words"/></block></custom-block></list></block></block></script></block></script></block-definition><block-definition s="list $arrowRight sentence %&apos;data&apos;" type="reporter" category="operators"><header></header><code></code><translations></translations><inputs><input type="%l"></input></inputs><script><block s="doWarp"><script><block s="doReport"><custom-block s="join words %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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var="ShoppingList"/></block><script><block s="doIfElse"><block s="reportListContainsItem"><block var="ShoppingList"/><block s="getLastAnswer"></block></block><script><block s="doSayFor"><l>Yes, here it is!</l><l>2</l></block><block s="doStopThis"><l><option>this script</option></l></block></script><script><block s="doSayFor"><l>Don&apos;t see it!</l><l>2</l></block><block s="doChangeVar"><l>index</l><l>1</l></block><block s="doStopThis"><l><option>this script</option></l></block></script></block></script></block></script></scripts></sprite><sprite name="Clear List" idx="2" x="-3.5666458893056014e-13" y="-4.458307361632002e-14" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="1" color="0,137.70000000000002,38.55600000000003,1" pen="tip" id="673"><costumes><list id="674"><item><ref mediaID="U3L1-ShoppingList_Empty to Students_Clear List_cst_shopping-list-button-clear-list"></ref></item></list></costumes><sounds><list struct="atomic" 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