<snapdata remixID="12249043"><project name="U3L1-ShoppingList_Empty to Students" app="Snap! 7, 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></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="addItem" type="command" category="control"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doAsk"><l>What would you like to add to the list?</l></block><block s="doAddToList"><block s="getLastAnswer"></block><block var="groceryList"/></block></script></block-definition><block-definition s="displaySearchResults" type="command" category="control"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doIfElse"><block s="reportEquals"><block var="onList"/><block s="reportBoolean"><l><bool>true</bool></l></block></block><script><block s="doSayFor"><block s="reportJoinWords"><list><block s="getLastAnswer"></block><l> is already on the list</l></list></block><l>2</l></block></script><script><block s="doSayFor"><block s="reportJoinWords"><list><block s="getLastAnswer"></block><l> is not on the list</l></list></block><l>2</l></block></script></block></script></block-definition><block-definition s="searchList" type="command" category="control"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doAsk"><l>search item</l></block><block s="doSetVar"><l>onList</l><block s="reportBoolean"><l><bool>false</bool></l></block></block><block s="doForEach"><l>item</l><block var="groceryList"/><script><block s="doIf"><block s="reportEquals"><block var="item"/><block s="getLastAnswer"></block></block><script><block s="doSetVar"><l>onList</l><block s="reportBoolean"><l><bool>true</bool></l></block></block></script></block></script></block></script></block-definition><block-definition s="deleteItem" type="command" category="control"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doAsk"><l>What item would you like to remove?</l></block><block s="doSetVar"><l>index</l><l>1</l></block><block s="doRepeat"><block s="reportListAttribute"><l><option>length</option></l><block var="groceryList"/></block><script><block s="doIf"><block s="reportEquals"><block s="reportListItem"><block var="index"/><block var="groceryList"/></block><block s="getLastAnswer"></block></block><script><block s="doDeleteFromList"><block var="index"/><block var="groceryList"/></block><block s="doSayFor"><l>Item removed!</l><l>2</l></block></script></block><block s="doSetVar"><l>index</l><block s="reportVariadicSum"><list><block var="index"/><l>1</l></list></block></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" volume="100" pan="0" lines="round" ternary="true" hyperops="true" codify="false" inheritance="false" sublistIDs="false" 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6SAAECBAgIsB8gQIAAAQKBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECByxcQFpoRMBzwAAAABJRU5ErkJggg==</pentrails><costumes><list struct="atomic" id="633"></list></costumes><sounds><list struct="atomic" id="634"></list></sounds><variables></variables><blocks></blocks><scripts></scripts><sprites select="1"><sprite name="Delete Item" idx="4" x="0" y="-100" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="1" color="173.4,31.211999999999993,0,1" pen="tip" id="639"><costumes><list id="640"><item><ref mediaID="Delete Item_cst_shopping-list-button-delete-item"></ref></item></list></costumes><sounds><list struct="atomic" id="641"></list></sounds><blocks></blocks><variables></variables><scripts><script x="73" y="27.33333333333337"><block s="receiveInteraction"><l><option>clicked</option></l></block><custom-block s="deleteItem"><comment w="90" collapsed="true">uses user input and linear search to remove items if necessary-- communicates when item has been removed </comment></custom-block></script></scripts></sprite><sprite name="Search" idx="3" x="0" y="-50" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="1" color="140.25,33.660000000000004,0,1" pen="tip" id="648"><costumes><list id="649"><item><ref mediaID="Search_cst_shopping-list-button-search"></ref></item></list></costumes><sounds><list struct="atomic" id="650"></list></sounds><blocks></blocks><variables></variables><scripts><script x="120" y="40.33333333333334"><block s="receiveInteraction"><l><option>clicked</option></l></block><custom-block s="searchList"><comment w="90" collapsed="true">accepts user input and searches list for item using bulean operators</comment></custom-block><custom-block s="displaySearchResults"><comment w="90" collapsed="true">displayes search results</comment></custom-block></script></scripts></sprite><sprite name="Clear List" idx="2" x="0" y="0" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="1" color="0,137.70000000000002,38.55600000000003,1" pen="tip" id="658"><costumes><list id="659"><item><ref mediaID="Clear List_cst_shopping-list-button-clear-list"></ref></item></list></costumes><sounds><list struct="atomic" id="660"></list></sounds><blocks></blocks><variables></variables><scripts><script x="192" y="39.33333333333334"><block s="receiveInteraction"><l><option>clicked</option></l></block><block s="doSetVar"><l>groceryList</l><block s="reportNewList"><list></list></block><comment w="90" collapsed="true">removes all items from list</comment></block></script></scripts></sprite><watcher var="index" style="normal" x="10" y="127.00000399999999" color="243,118,29" hidden="true"/><watcher var="onList" style="normal" x="12" y="213.000002" color="243,118,29" hidden="true"/><watcher var="groceryList" style="normal" x="5" y="8" color="243,118,29" extX="109" extY="84"/><sprite name="Add Item" idx="1" x="-3" y="56.00000000000003" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="1" color="80,80,80,1" pen="tip" id="675"><costumes><list id="676"><item><ref mediaID="Add Item_cst_shopping-list-button-add-item"></ref></item></list></costumes><sounds><list struct="atomic" id="677"></list></sounds><blocks></blocks><variables></variables><scripts><script x="152.33333333333337" y="138.33333333333337"><block s="receiveInteraction"><l><option>clicked</option></l></block><custom-block s="addItem"><comment w="90" collapsed="true">when the sprite is clicked, procedure aks once for user input and adds said input to the list-- sprite must be clicked once for each item added</comment></custom-block></script><script x="139.33333333333337" y="36.33333333333292"><block s="receiveGo"></block><block s="doSetVar"><l>groceryList</l><block s="reportNewList"><list><l>apples</l><l>peanut butter</l><l>ham</l></list></block><comment w="90" collapsed="true">sets up starter list</comment></block></script></scripts></sprite></sprites></stage><variables><variable name="groceryList"><list struct="atomic" id="695">peanut butter,ham,oranges</list></variable><variable name="onList"><bool>true</bool></variable><variable name="index"><l>5</l></variable></variables></scene></scenes></project><media name="U3L1-ShoppingList_Empty to Students" app="Snap! 7, https://snap.berkeley.edu" version="2"><costume name="shopping-list-button-delete-item" center-x="53" center-y="15" 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