<snapdata remixID="14979469"><project name="Class/Instance OOP" 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="Class/Instance OOP"><notes></notes><palette><category name="OOP" color="189,0,50,1"/></palette><hidden></hidden><headers></headers><code></code><blocks><block-definition s="class %&apos;constructor&apos; %&apos;extends&apos;" type="reporter" category="OOP"><header></header><code></code><translations></translations><inputs><input type="%cmdRing"></input><input type="%mult%obj" irreplaceable="true" expand="extends&#xD;" max="1"></input></inputs><script><block s="doDeclareVariables"><list><l>class object</l></list></block><block s="doSetVar"><l>class object</l><block s="reportNewList"><list><block s="reportNewList"><list><l>constructor</l><block var="constructor"/></list></block><block s="reportNewList"><list><l>prototype</l><block s="reportNewList"><list></list></block></list></block></list></block></block><block s="doIf"><block s="reportNot"><block s="reportListIsEmpty"><block var="extends"/></block></block><script><block s="doReplaceInList"><l><option>parent</option></l><block s="reportListItem"><l>prototype</l><block var="class object"/></block><block s="reportListItem"><l>prototype</l><block s="reportListItem"><l>1</l><block var="extends"/></block></block></block><block s="doReplaceInList"><l>parent class</l><block var="class object"/><block s="reportListItem"><l>1</l><block var="extends"/></block></block></script><list></list></block><block s="doReport"><block var="class object"/></block></script></block-definition><block-definition s="new %&apos;class&apos; %&apos;args&apos; (old)" type="reporter" category="OOP"><header></header><code></code><translations></translations><inputs><input type="%n" readonly="true" initial="1">class</input><input type="%mult%s" expand="with inputs"></input></inputs><script><block s="doDeclareVariables"><list><l>object</l><l>current</l><l>get slots</l><l>binded</l><l>start</l><l>end</l></list></block><block s="doSetVar"><l>object</l><block s="reportNewList"><list></list></block></block><block s="doIf"><block s="reportVariadicLessThan"><list><block s="reportListAttribute"><l><option>length</option></l><block var="class"/></block><l>2</l></list></block><script><block s="doReplaceInList"><l>constructor</l><block var="object"/><block s="reportListItem"><l>1</l><block var="class"/></block></block><block s="doSetVar"><l>binded</l><block s="reportListItem"><l>constructor</l><block var="object"/></block></block><block s="doReplaceInList"><l>constructor</l><block var="object"/><block var="class"/></block><block s="doRun"><block var="binded"/><block var="args"/></block><block s="doReport"><block var="object"/></block></script><list></list></block><block s="doSetVar"><l>binded</l><block s="reportNewList"><list></list></block></block><block s="doSetVar"><l>current</l><block var="class"/></block><block s="doSetVar"><l>start</l><l>1</l></block><block s="doSetVar"><l>get slots</l><block s="reifyScript"><script><block s="doIf"><block s="reportNot"><block s="reportListIsEmpty"><block s="reportAttributeOf"><l><option>input names</option></l><block var="x"/></block></block></block><script><block s="doReport"><block s="reportListAttribute"><l><option>length</option></l><block s="reportAttributeOf"><l><option>input names</option></l><block var="x"/></block></block></block></script><list></list></block><block s="doDeclareVariables"><list><l>split</l><l>i</l><l>y</l></list></block><block s="doSetVar"><l>split</l><block s="reportTextSplit"><block var="x"/><l><option>blocks</option></l></block></block><block s="doIf"><block s="reportNot"><block s="reportIsA"><block s="reportListItem"><l>1</l><block var="split"/></block><l><option>list</option></l></block></block><script><block s="doSetVar"><l>split</l><block s="reportNewList"><list><block var="split"/></list></block></block></script><list></list></block><block s="doWarp"><script><block s="doForEach"><l>part</l><block s="reportConcatenatedLists"><list><block var="split"/></list></block><script><block s="doApplyExtension"><l>err_try(cmd, catch, err)</l><list><block s="reifyScript"><script><block s="doSetVar"><l>y</l><block s="reportBlockAttribute"><l><option>selector</option></l><block s="reportListItem"><l>1</l><block var="part"/></block></block></block></script><list></list></block><block s="reifyScript"><script><block s="doSetVar"><l>y</l><block s="reportBoolean"><l><bool>false</bool></l></block></block></script><list></list></block><l></l></list></block><block s="doApplyExtension"><l>err_reset</l><list></list></block><block s="doChangeVar"><l>i</l><l>1</l></block><block s="doIf"><block s="reportVariadicIsIdentical"><list><block var="y"/><l>reportJSFunction</l></list></block><script><block s="doDeleteFromList"><block var="i"/><block var="split"/></block></script><list></list></block></script></block></script></block><block s="doReport"><block s="reportListAttribute"><l><option>length</option></l><block s="reportKeep"><block s="reifyPredicate"><autolambda><block s="reportVariadicEquals"><list><block var="value"/><l></l></list></block></autolambda><list><l>value</l></list></block><block s="reportConcatenatedLists"><block var="split"/></block></block></block></block></script><list><l>x</l></list></block></block><block s="doUntil"><block s="reportVariadicEquals"><list><block var="current"/><l></l></list></block><script><block s="doReplaceInList"><l>constructor</l><block var="object"/><block s="reportListItem"><l>1</l><block var="current"/></block></block><block s="doAddToList"><block s="reportListItem"><l>constructor</l><block var="object"/></block><block var="binded"/></block><block s="doSetVar"><l>current</l><block s="reportListItem"><l>2</l><block var="current"/></block></block></script></block><block s="doReplaceInList"><l>constructor</l><block var="object"/><block var="class"/></block><block s="doForEach"><l>cnstrctr</l><block s="reportListAttribute"><l><option>reverse</option></l><block var="binded"/></block><script><block s="doSetVar"><l>end</l><block s="evaluate"><block var="get slots"/><list><block var="cnstrctr"/></list></block></block><block s="doRun"><block var="cnstrctr"/><block s="reportListItem"><block s="reportNumbers"><block var="start"/><block s="reportVariadicSum"><list><block var="start"/><block var="end"/></list></block></block><block var="args"/></block></block><block s="doChangeVar"><l>start</l><block var="end"/></block></script></block><block s="doReport"><block var="object"/></block></script><scripts><script x="685.6078431372548" y="217.63398692810483"><block s="receiveSlotEvent"><l>class</l><l><option>edited</option></l></block><block s="doSetSlot"><l>class</l><l>class</l></block></script></scripts></block-definition><block-definition s="prototype of %&apos;class&apos;" type="reporter" category="OOP"><header></header><code></code><translations></translations><inputs><input type="%n" readonly="true" initial="1">class</input></inputs><script><block s="doReport"><block s="reportListItem"><l>prototype</l><block var="class"/></block></block></script></block-definition><block-definition s="set %&apos;property&apos; of %&apos;obj&apos; to %&apos;value&apos;" type="command" category="OOP" space="true"><header></header><code></code><translations></translations><inputs><input type="%s" initial="1"><options>parent=$_parent</options></input><input type="%n" readonly="true" initial="1">object</input><input type="%s" initial="1"></input></inputs><script><block s="doIf"><block s="reportVariadicAnd"><list><block s="reportVariadicNotEquals"><list><block var="property"/><l>constructor</l></list></block><block s="reportNot"><block s="reportIsA"><block var="property"/><l><option>number</option></l></block></block></list></block><script><block s="doReplaceInList"><block var="property"/><block var="obj"/><block var="value"/></block></script><list></list></block></script><scripts><script x="330.70588235294133" y="159.33333333333348"><block s="receiveSlotEvent"><l>obj</l><l><option>edited</option></l></block><block s="doSetSlot"><l>obj</l><l>object</l></block></script></scripts></block-definition><block-definition s="delete %&apos;property&apos; from %&apos;obj&apos;" type="command" category="OOP"><header></header><code></code><translations></translations><inputs><input type="%s" initial="1"><options>parent=$_parent</options></input><input type="%n" readonly="true" initial="1">object</input></inputs><script><block s="doIf"><block s="reportVariadicAnd"><list><block s="reportVariadicNotEquals"><list><block var="property"/><l>constructor</l></list></block><block s="reportNot"><block s="reportIsA"><block var="property"/><l><option>number</option></l></block></block></list></block><script><block s="doDeleteFromList"><block var="property"/><block var="obj"/></block></script><list></list></block></script><scripts><script x="617.9607843137255" y="94.62745098039233"><block s="receiveSlotEvent"><l>obj</l><l><option>edited</option></l></block><block s="doSetSlot"><l>obj</l><l>object</l></block></script></scripts></block-definition><block-definition s="%&apos;obj&apos; `s %&apos;property&apos;" type="reporter" category="OOP"><header></header><code></code><translations></translations><inputs><input type="%n" readonly="true" initial="1">object</input><input type="%s" initial="1"><options>parent=$_parent</options></input></inputs><script><block s="doIf"><block s="reportNot"><block s="reportIsA"><block var="property"/><l><option>number</option></l></block></block><script><block s="doReport"><block s="reportListItem"><block var="property"/><block var="obj"/></block></block></script><list></list></block><block s="doReport"><l></l></block></script><scripts><script x="389.5294117647061" y="198.5490196078432"><block s="receiveSlotEvent"><l>obj</l><l><option>edited</option></l></block><block s="doSetSlot"><l>obj</l><l>object</l></block></script></scripts></block-definition><block-definition s="%&apos;reporters&apos;" type="reporter" category="OOP" helper="true" space="true"><header></header><code></code><translations></translations><inputs><input type="%group%repRing%s" irreplaceable="true" expand="$nl&#xD;:" initial="2"></input></inputs><script><block s="doReport"><block var="reporters"/></block></script></block-definition><block-definition s="run parent class $arrowUp-1.2-229-153-173 %&apos;inputs&apos;" type="command" category="OOP" space="true"><header></header><code></code><translations></translations><inputs><input type="%mult%s" expand="with inputs"></input></inputs><script><block s="doDeclareVariables"><list><l>object</l></list></block><block s="doSetVar"><l>object</l><block s="reportAskFor"><block s="reportEnvironment"><l><option>caller</option></l></block><block s="reifyReporter"><autolambda><block s="reportEnvironment"><l><option>object</option></l></block></autolambda><list></list></block><list></list></block></block><block s="doReplaceInList"><l>__index__</l><block var="object"/><block s="reportVariadicSum"><list><block s="reportListItem"><l>__index__</l><block var="object"/></block><l>1</l></list></block></block><block s="bubble"><block s="reportListItem"><block s="reportListItem"><l>__index__</l><block var="object"/></block><block s="reportListItem"><l>__constructors__</l><block var="object"/></block></block><comment w="90" collapsed="false">Why won&apos;t this work?</comment></block><block s="doRun"><block s="reportListItem"><block s="reportListItem"><l>__index__</l><block var="object"/></block><block s="reportListItem"><l>__constructors__</l><block var="object"/></block></block><block var="inputs"/></block></script></block-definition><block-definition s="%&apos;object&apos; is a %&apos;class&apos; ?" type="predicate" category="OOP" space="true"><header></header><code></code><translations></translations><inputs><input type="%n" readonly="true" initial="1">object</input><input type="%n" readonly="true" initial="1">class</input></inputs><script><block s="doReport"><block s="evaluate"><block s="reifyScript"><script><block s="doIf"><block s="reportVariadicIsIdentical"><list><block s="reportListItem"><l>1</l><block var="cnstrctor"/></block><block s="reportListItem"><l>1</l><block var="trgt"/></block></list></block><script><block s="doReport"><block s="reportBoolean"><l><bool>true</bool></l></block></block></script><list><block s="reportVariadicGreaterThan"><list><block s="reportListAttribute"><l><option>length</option></l><block var="cnstrctor"/></block><l>1</l></list></block><script><block s="doReport"><block s="evaluate"><block s="reportEnvironment"><l><option>script</option></l></block><list><block s="reportListItem"><l>2</l><block var="cnstrctor"/></block><block var="trgt"/></list></block></block></script></list></block><block s="doReport"><block s="reportBoolean"><l><bool>false</bool></l></block></block></script><list><l>cnstrctor</l><l>trgt</l></list></block><list><block s="reportListItem"><l>constructor</l><block var="object"/></block><block var="class"/></list></block></block></script><scripts><script x="414.5" y="240.70000000000005"><block s="receiveSlotEvent"><l>class</l><l><option>edited</option></l></block><block s="doSetSlot"><l>class</l><l>class</l></block></script><script x="167.5" y="273.70000000000005"><block s="receiveSlotEvent"><l>object</l><l><option>edited</option></l></block><block s="doSetSlot"><l>object</l><l>object</l></block></script></scripts></block-definition><block-definition s="%&apos;key&apos; is in %&apos;obj&apos; ?" type="predicate" category="OOP"><header></header><code></code><translations></translations><inputs><input type="%s" initial="1"></input><input type="%n" readonly="true" initial="1">object</input></inputs><script><block s="doReport"><block s="reportListContainsItem"><block s="reportListItem"><l>1</l><block s="reportListAttribute"><l><option>columns</option></l><block var="obj"/></block></block><block var="key"/></block></block></script><scripts><script x="189.5" y="100.69999999999999"><block s="receiveSlotEvent"><l>obj</l><l><option>edited</option></l></block><block s="doSetSlot"><l>obj</l><l>object</l></block></script></scripts></block-definition><block-definition s="for %&apos;upvars&apos; in %&apos;object&apos; %&apos;script&apos;" type="command" category="OOP" space="true"><header></header><code></code><translations></translations><inputs><input type="%group%upvar%upvar%b" irreplaceable="true" expand="​&#xD;​&#xD;own properties only?" initial="1" min="1" max="3">key&#xD;value&#xD;true</input><input type="%n" readonly="true" initial="1">object</input><input type="%cs" irreplaceable="true" initial="1"></input></inputs></block-definition><block-definition s="new %&apos;class&apos; %&apos;args&apos;" type="reporter" category="OOP"><header></header><code></code><translations></translations><inputs><input type="%n" readonly="true" initial="1">class</input><input type="%mult%s" expand="with inputs"></input></inputs><script><block s="doDeclareVariables"><list><l>binded</l><l>object</l><l>current</l></list></block><block s="doSetVar"><l>binded</l><block s="reportNewList"><list></list></block></block><block s="doSetVar"><l>object</l><block s="reportNewList"><list></list></block></block><block s="doSetVar"><l>current</l><block var="class"/></block><block s="doWarp"><script><block s="doUntil"><block s="reportNot"><block s="reportListContainsItem"><block s="reportListItem"><l>1</l><block s="reportListAttribute"><l><option>columns</option></l><block var="current"/></block></block><l>parent class</l></block></block><script><block s="doReplaceInList"><l>constructor</l><block var="object"/><block s="reportListItem"><l>constructor</l><block var="current"/></block></block><block s="doAddToList"><block s="reportListItem"><l>constructor</l><block var="object"/></block><block var="binded"/></block><block s="doSetVar"><l>current</l><block s="reportListItem"><l>parent class</l><block var="current"/></block></block></script></block><block s="doAddToList"><block s="reportListItem"><l>constructor</l><block var="current"/></block><block var="binded"/></block><block s="doSetVar"><l>current</l><block s="reportListItem"><l>parent class</l><block var="current"/></block></block></script></block><block s="doDeleteFromList"><l>constructor</l><block var="object"/></block><block s="doReplaceInList"><l>__constructors__</l><block var="object"/><block var="binded"/></block><block s="doReplaceInList"><l>__index__</l><block var="object"/><l>1</l></block><block s="doReplaceInList"><l><option>parent</option></l><block var="object"/><custom-block s="prototype of %n"><block var="class"/></custom-block></block><block s="doRun"><block s="reportListItem"><l>1</l><block var="binded"/></block><block var="args"/></block><block s="doReport"><block var="object"/></block></script><scripts><script x="685.6078431372548" y="217.63398692810483"><block s="receiveSlotEvent"><l>class</l><l><option>edited</option></l></block><block s="doSetSlot"><l>class</l><l>class</l></block></script></scripts></block-definition><block-definition s="$poster index" type="reporter" category="OOP" space="true"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doReport"><l></l></block></script></block-definition></blocks><primitives></primitives><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="false" hyperops="true" codify="false" inheritance="true" sublistIDs="false" 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s="reifyScript"><script></script><list></list></block><list><l/></list></custom-block></autolambda><list></list></block><l>Creates a new class extending another.</l><block s="reifyReporter"><autolambda><custom-block s="new %n %mult%s (old)"><l>class</l><list></list></custom-block></autolambda><list></list></block><l>Creates a new object from the class</l><block s="reifyReporter"><script><custom-block s="set %s of %n to %s"><l></l><l>object</l><l></l></custom-block></script><list></list></block><l>Adds or redefines the value of an object&apos;s property</l><block s="reifyReporter"><script><custom-block s="delete %s from %n"><l></l><l>object</l></custom-block></script><list></list></block><l>Removes a property from an object</l><block s="reifyReporter"><autolambda><custom-block s="%n `s %s"><l>object</l><l></l></custom-block></autolambda><list></list></block><l>Reports a property from an object</l><block s="reifyReporter"><autolambda><custom-block s="%n is a %n 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