<snapdata remixID="12265428"><project name="U2L2p1-ShoppingList" app="Snap! 8.1, https://snap.berkeley.edu" version="2"><notes></notes><thumbnail>data:image/png;base64,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</thumbnail><scenes select="1"><scene name="U2L2p1-ShoppingList"><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></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></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="reportEquals"><block var="data"/><block s="reportNewList"><list></list></block></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></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></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="reportGreaterThan"><block var="start"/><block var="end"/></block><script><block s="doSetVar"><l>step</l><l>-1</l></block><block s="doSetVar"><l>tester</l><block s="reifyReporter"><autolambda><block s="reportLessThan"><block var="i"/><block var="end"/></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="reportGreaterThan"><block var="i"/><block var="end"/></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></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" 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></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 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="Delete item from list %&apos;itemToBeDeleted&apos;" type="command" category="other"><header></header><code></code><translations></translations><inputs><input type="%s"></input></inputs><script><block s="doDeclareVariables"><list><l>isDeleted</l></list></block><block s="doSetVar"><l>isDeleted</l><block s="reportBoolean"><l><bool>false</bool></l></block></block><block s="doFor"><l>i</l><l>1</l><block s="reportListAttribute"><l><option>length</option></l><block var="shopping list"/></block><script><block s="doIf"><block s="reportEquals"><block var="itemToBeDeleted"/><block s="reportListItem"><block var="i"/><block var="shopping list"/></block></block><script><block s="doDeleteFromList"><block var="i"/><block var="shopping list"/></block><block s="doSetVar"><l>isDeleted</l><block s="reportBoolean"><l><bool>true</bool></l></block></block></script></block></script></block><block s="doIfElse"><block s="reportEquals"><block var="isDeleted"/><block s="reportBoolean"><l><bool>true</bool></l></block></block><script><block s="doSayFor"><block s="reportJoinWords"><list><block var="itemToBeDeleted"/><l> has been deleted.</l></list></block><l>2</l></block></script><script><block s="doSayFor"><l>The item was not in the list.</l><l>2</l></block></script></block></script></block-definition><block-definition s="Add item to list %&apos;item&apos;" type="command" category="other"><header></header><code></code><translations></translations><inputs><input type="%s"></input></inputs><script><block s="doDeclareVariables"><list><l>isAdded</l></list></block><block s="doSetVar"><l>isAdded</l><l>0</l></block><block s="doFor"><l>i</l><l>1</l><block s="reportListAttribute"><l><option>length</option></l><block var="shopping list"/></block><script><block s="doIf"><block s="reportEquals"><block var="item"/><block s="reportListItem"><block var="i"/><block var="shopping list"/></block></block><script><block s="doAddToList"><block var="i"/><block var="shopping list"/></block><block s="doSetVar"><l>isAdded</l><block s="reportBoolean"><l><bool>true</bool></l></block></block></script></block></script></block><block s="doAddToList"><block var="item"/><block var="shopping list"/></block></script></block-definition><block-definition s="Clear list %&apos;answer&apos;" type="command" category="other"><header></header><code></code><translations></translations><inputs><input type="%s"></input></inputs><script><block s="doIfElse"><block s="reportOr"><block s="reportEquals"><block var="answer"/><l>yes</l></block><block s="reportEquals"><block var="answer"/><l>Yes</l></block></block><script><block s="doSetVar"><l>shopping list</l><block s="reportNewList"><list></list></block></block></script><script><block s="doSayFor"><l>Okay, I won&apos;t.</l><l>2</l></block></script></block></script></block-definition></blocks><stage name="Stage" width="480" height="360" costume="0" color="255,255,255,1" tempo="60" threadsafe="false" penlog="false" 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struct="atomic" id="653"></list></costumes><sounds><list struct="atomic" id="654"></list></sounds><variables></variables><blocks></blocks><scripts></scripts><sprites select="1"><sprite name="Clear List" idx="2" x="7.958078640513122e-13" y="2.138755980861191" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="2" color="0,0,0,1" pen="tip" id="659"><costumes><list id="660"><item><ref mediaID="Clear List_cst_shopping-list-button-clear-list(2)"></ref></item><item><ref mediaID="Clear List_cst_Clear List"></ref></item></list></costumes><sounds><list struct="atomic" id="661"></list></sounds><blocks></blocks><variables></variables><scripts><script x="30" y="30"><block s="receiveInteraction"><l><option>clicked</option></l><comment w="53.333333333333336" collapsed="true">1.5</comment></block><block s="doAsk"><l>Are you sure you want to delete everything from the list?</l></block><custom-block s="Clear list %s"><block s="getLastAnswer"></block></custom-block></script><comment x="250.6533203125" y="111.30000000000001" w="177.33333333333334" collapsed="false">The ELSE part isn&apos;t required by the problem, but it&apos;s bad user interface design to just silently do nothing -- it makes the user nervous.</comment></scripts></sprite><sprite name="Delete Item" idx="3" x="7.958078640513122e-13" y="-50.86124401913878" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="0" color="89.7599999999999,0,204,1" pen="tip" id="672"><wear><ref mediaID="3"></ref></wear><costumes><list id="673"><item><ref mediaID="Delete Item_cst_Delete Item"></ref></item></list></costumes><sounds><list struct="atomic" id="674"></list></sounds><blocks></blocks><variables></variables><scripts><comment x="30" y="115.33333333333337" w="320" collapsed="false">The above is all that&apos;s required.  But when deleting something, especially selected by number, it&apos;s a good idea to get confirmation:</comment><script x="30" y="176.66666666666669"><block s="doDeclareVariables"><list><l>item number</l></list></block><block s="doAsk"><l>Enter the item number of the item you want to delete.</l></block><block s="doSetVar"><l>item number</l><block s="getLastAnswer"></block></block><block s="doAsk"><block s="reportJoinWords"><list><l>Delete </l><block s="reportListItem"><block var="item number"/><block var="shopping list"/></block><l>?</l></list></block></block><block s="doIfElse"><block s="reportEquals"><block s="getLastAnswer"></block><l>yes</l></block><script><block s="doDeleteFromList"><block var="item number"/><block var="shopping list"/></block></script><script><block s="doSayFor"><l>Operation cancelled.</l><l>2</l></block></script></block></script><script x="31" y="413"><block s="receiveInteraction"><l><option>clicked</option></l><comment w="53.333333333333336" collapsed="true">1.7</comment></block><block s="doAsk"><l>Enter the name of the item you want to delete.</l></block><custom-block s="Delete item from list %s"><block s="getLastAnswer"></block></custom-block></script><script x="36" y="48"><block s="doAsk"><l>Enter the item number of the item you want to delete.</l></block><block s="doDeleteFromList"><block s="getLastAnswer"></block><block var="shopping list"/></block></script></scripts></sprite><watcher var="shopping list" style="normal" x="10.000000000000227" y="10" color="243,118,29" extX="80" extY="70"/><sprite name="Add Item" idx="1" x="-0.9999999999992042" y="42.13875598086122" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="2" color="80,80,80,1" pen="tip" id="729"><costumes><list id="730"><item><ref mediaID="Add Item_cst_null"></ref></item><item><ref mediaID="Add Item_cst_Add Item"></ref></item></list></costumes><sounds><list struct="atomic" id="731"></list></sounds><blocks></blocks><variables></variables><scripts><script x="13.333333333333343" y="17.999999999999986"><block s="doSetVar"><l>shopping list</l><block s="reportNewList"><list></list></block><comment w="90" collapsed="true">page 1, ex. 2</comment></block></script><comment x="12.666666666666657" y="192.66666666666663" w="170" collapsed="true">1.7 is in the Delete Item sprite.</comment><comment x="12.666666666666657" y="161.33333333333337" w="170" collapsed="true">1.5 is in the Clear List sprite.</comment><script x="16" y="231"><block s="receiveInteraction"><l><option>clicked</option></l><comment w="53.333333333333336" collapsed="true">1.3</comment></block><block s="doAsk"><l>What item should I add to the shopping list?</l></block><custom-block s="Add item to list %s"><block s="getLastAnswer"></block></custom-block></script><script x="14.666666666666629" y="72.66666666666666"><block s="doAsk"><l>What item should I add to the shopping list?</l></block><block s="doAddToList"><block s="getLastAnswer"></block><block var="shopping list"/></block></script></scripts></sprite></sprites></stage><variables><variable name="shopping list"><list struct="atomic" id="755"></list></variable></variables></scene></scenes></project><media name="U2L2p1-ShoppingList" app="Snap! 8.1, https://snap.berkeley.edu" version="2"><costume name="shopping-list-button-clear-list(2)" center-x="53" center-y="15" 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mediaID="Clear List_cst_Clear List"/><costume name="Delete Item" center-x="53" center-y="15" 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mediaID="3"/><costume name="Delete Item" center-x="53" center-y="15" 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