<snapdata remixID="11201921"><project name="5.3" 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="5.3"><notes></notes><hidden></hidden><headers></headers><code></code><blocks><block-definition s="create %&apos;scope&apos; var %&apos;names&apos;" type="command" category="variables"><comment x="0" y="0" w="146" collapsed="false">This block creates  new variables on the selected scope: global (for all sprites), sprite (for this sprite only) or script (only for that blocks stack) with the names given (in &apos;names&apos; list).&#xD;&#xD;If there is already a variable with that name in that scope, it does nothing: no errors and no overwrites.</comment><header></header><code></code><translations>pt:cria as variáveis _ _&#xD;ca:crea les _ variables _&#xD;es:crear las _ variables _&#xD;de:erstellen _ var _&#xD;</translations><inputs><input type="%s" readonly="true">global<options>global&#xD;sprite&#xD;script</options></input><input type="%mult%txt"></input></inputs><script><block s="doIfElse"><block s="reportEquals"><block var="scope"/><l>script</l></block><script><block s="doForEach"><l>each item</l><block var="names"/><script><block s="doRun"><block s="reportJSFunction"><list><l>varName</l><l>proc</l></list><l>if ((typeof varName) != "string" || varName === "") {&#xD;    throw new Error("name isn&apos;t a string: " + varName);&#xD;}&#xD;if (!proc.homeContext.variables.vars[varName]) proc.homeContext.variables.addVar(varName);</l></block><list><block var="each item"/></list></block></script></block></script><script><block s="doDeclareVariables"><list><l>global</l></list></block><block s="doIfElse"><block s="reportEquals"><block var="scope"/><l>sprite</l></block><script><block s="doSetVar"><l>global</l><block s="reportBoolean"><l><bool>false</bool></l></block></block></script><script><block s="doSetVar"><l>global</l><block s="reportBoolean"><l><bool>true</bool></l></block></block></script></block><block s="doForEach"><l>each item</l><block var="names"/><script><block s="doRun"><block s="reportJSFunction"><list><l>varName</l><l>global</l><l>proc</l></list><l>if ((typeof varName) != "string" || varName === "") {&#xD;    throw new Error("name isn&apos;t a string: " + varName);&#xD;}&#xD;if (global &amp;&amp; !proc.homeContext.variables.parentFrame.parentFrame.vars[varName]) this.addVariable(varName, true);&#xD;if (!global &amp;&amp; !proc.homeContext.variables.parentFrame.vars[varName]) this.addVariable(varName, false);</l></block><list><block var="each item"/><block var="global"/></list></block></script></block><block s="doRun"><block s="reportJSFunction"><list></list><l>var ide = this.parentThatIsA(IDE_Morph);&#xD;ide.flushBlocksCache(&apos;variables&apos;); // b/c of inheritance&#xD;ide.refreshPalette();</l></block><list></list></block></script></block></script></block-definition><block-definition s="delete var %&apos;names&apos;" type="command" category="variables"><comment x="0" y="0" w="217" collapsed="false">This block deletes all the variables with the names given (inside input list).&#xD;&#xD;Each name will make only one variable deletion, and this will be the variable found following the scope order: &apos;script&apos; -&gt; &apos;sprite&apos; -&gt; &apos;global&apos;.&#xD;&#xD;If we have a &quot;testing&quot; sprite variable and also a &quot;testing&quot; global one, deleting &quot;testing&quot; will delete only the sprite one (Yes! we can also do &quot;delete var (testing, testing)&quot; to delete both.&#xD;&#xD;If one variable does not exists (in any scope) an error happens, stopping block action in that point. You can check it before with the &quot;does var (name) exists?&quot;block. </comment><header></header><code></code><translations>pt:remove as variáveis _&#xD;ca:esborra les variables _&#xD;es:borrar variables _&#xD;de:löschen var _&#xD;</translations><inputs><input type="%mult%txt"></input></inputs><script><block s="doForEach"><l>each item</l><block var="names"/><script><block s="doRun"><block s="reportJSFunction"><list><l>varName</l><l>proc</l></list><l>if ((typeof varName) != "string" || varName === "") {&#xD;    throw new Error("name isn&apos;t a string: " + varName);&#xD;}&#xD;if (typeof proc.homeContext.variables.vars[varName] !== &apos;undefined&apos;) {&#xD;    delete proc.homeContext.variables.vars[varName];&#xD;} else if (this.deletableVariableNames().indexOf(varName) != -1) {&#xD;    this.deleteVariable(varName);&#xD;} else {&#xD;    throw new Error("variable doesn&apos;t exist: " + varName);&#xD;}</l></block><list><block var="each item"/></list></block></script></block><block s="doRun"><block s="reportJSFunction"><list></list><l>var ide = this.parentThatIsA(IDE_Morph);&#xD;ide.flushBlocksCache(&apos;variables&apos;); // b/c of inheritance&#xD;ide.refreshPalette();</l></block><list></list></block></script></block-definition><block-definition s="set var %&apos;name&apos; to %&apos;value&apos;" type="command" category="variables"><comment x="0" y="0" w="240.4931640625" collapsed="false">This block sets the given value (last input) to the variable named with the name givent (var input).&#xD;&#xD;It looks for that variable following the scope order &apos;script&apos; -&gt; &apos;sprite&apos; -&gt; &apos;global&apos; (the first match it finds).&#xD;&#xD;If that variable does not exist (in any scope) an error happens, stopping their script. You can check it before using the &quot;does var (name) exists?&quot; block. </comment><header></header><code></code><translations>ca:assigna a _ el valor _&#xD;es:asignar a _ el valor _&#xD;pt:altera _ para _&#xD;de:setze var _ auf _&#xD;</translations><inputs><input type="%s"><options>§_getVarNamesDict</options></input><input type="%s"></input></inputs><script><block s="doRun"><block s="reportJSFunction"><list><l>varName</l><l>value</l><l>proc</l></list><l>if ((typeof varName) != "string") {&#xD;    throw new Error("name isn&apos;t a string: " + varName);&#xD;}&#xD;proc.homeContext.variables.setVar(varName, value);</l></block><list><block var="name"/><block var="value"/></list></block></script></block-definition><block-definition s="var %&apos;name&apos;" type="reporter" category="variables"><comment x="0" y="0" w="178.00000000000003" collapsed="false">This block reports the value of the variable with the name given.&#xD;&#xD;It looks for that variable following the scope order &apos;script&apos; -&gt; &apos;sprite&apos; -&gt; &apos;global&apos; (the first match it finds).&#xD;&#xD;If that variable does not exist (in any scope) an error happens, stopping their script. You can check it before using the &quot;does var (name) exists?&quot; block. </comment><header></header><code></code><translations>pt:o valor de _&#xD;</translations><inputs><input type="%s"><options>§_getVarNamesDict</options></input></inputs><script><block s="doReport"><block s="evaluate"><block s="reportJSFunction"><list><l>varName</l><l>proc</l></list><l>if ((typeof varName) != "string") {&#xD;    throw new Error("name isn&apos;t a string: " + varName);&#xD;}&#xD;return proc.homeContext.variables.getVar(varName);</l></block><list><block var="name"/></list></block></block></script></block-definition><block-definition s="does var %&apos;name&apos; exist?" type="predicate" category="variables"><comment x="0" y="0" w="146" collapsed="false">This block reports &quot;true&quot; if there is a variable with this given name (input slot) in that context.&#xD;&#xD;It can be a global, sprite or script variable.&#xD;&#xD;Otherwise it reports &quot;false&quot;.</comment><header></header><code></code><translations>pt:a variável _ existe&#xD;ca:existeix la variable _ ?&#xD;es:existe la variable _ ?&#xD;de:existiert var _ ?&#xD;</translations><inputs><input type="%s"></input></inputs><script><block s="doReport"><block s="evaluate"><block s="reportJSFunction"><list><l>varName</l><l>proc</l></list><l>if ((typeof varName) != "string" || varName === "") {&#xD;    throw new Error("name isn&apos;t a string: " + varName);&#xD;}&#xD;return proc.homeContext.variables.silentFind(varName)? true:false;</l></block><list><block var="name"/></list></block></block></script></block-definition><block-definition s="show var %&apos;name&apos;" type="command" category="variables"><comment x="0" y="0" w="181" collapsed="false">This block turns on (show) the watcher view on stage (if it was not already activated) of the variable with the given name (slot input).&#xD;&#xD;It can only access to the closest variable scope (if there different variables with the same name in different scopes) following the order &apos;script&apos; -&gt; &apos;sprite&apos; -&gt; &apos;global&apos;.&#xD;&#xD;No errors if that variable does not exist.</comment><header></header><code></code><translations>ca:mostra la variable _&#xD;es:mostrar variable _&#xD;pt:mostra a variável _&#xD;de:zeige var _&#xD;</translations><inputs><input type="%s"><options>§_getVarNamesDict</options></input></inputs><script><block s="doIf"><custom-block s="does var %s exist?"><block var="name"/></custom-block><script><block s="doRun"><block s="reportJSFunction"><list><l>varName</l><l>proc</l></list><l>    var varFrame = proc.homeContext.variables,&#xD;        stage,&#xD;        watcher,&#xD;        target,&#xD;        label,&#xD;        others,&#xD;        isGlobal,&#xD;        name = varName;&#xD;&#xD;    if (name instanceof Context) {&#xD;        if (name.expression.selector === &apos;reportGetVar&apos;) {&#xD;            name = name.expression.blockSpec;&#xD;        } else {&#xD;            proc.doChangePrimitiveVisibility(name.expression, false);&#xD;            return;&#xD;        }&#xD;    }&#xD;    if (proc.homeContext.receiver) {&#xD;        stage = proc.homeContext.receiver.parentThatIsA(StageMorph);&#xD;        if (stage) {&#xD;            target = varFrame.silentFind(name);&#xD;            if (!target) {return; }&#xD;            // first try to find an existing (hidden) watcher&#xD;            watcher = detect(&#xD;                stage.children,&#xD;                morph =&gt; morph instanceof WatcherMorph &amp;&amp;&#xD;                    morph.target === target &amp;&amp;&#xD;                        morph.getter === name&#xD;            );&#xD;            if (watcher !== null) {&#xD;                watcher.show();&#xD;                watcher.fixLayout(); // re-hide hidden parts&#xD;                return;&#xD;            }&#xD;            // if no watcher exists, create a new one&#xD;            isGlobal = contains(&#xD;                proc.homeContext.receiver.globalVariables().names(),&#xD;                varName&#xD;            );&#xD;            if (isGlobal || target.owner) {&#xD;                label = name;&#xD;            } else {&#xD;                label = name + &apos; &apos; + localize(&apos;(temporary)&apos;);&#xD;            }&#xD;            watcher = new WatcherMorph(&#xD;                label,&#xD;                SpriteMorph.prototype.blockColor.variables,&#xD;                target,&#xD;                name&#xD;            );&#xD;            watcher.setPosition(stage.position().add(10));&#xD;            others = stage.watchers(watcher.left());&#xD;            if (others.length &gt; 0) {&#xD;                watcher.setTop(others[others.length - 1].bottom());&#xD;            }&#xD;            stage.add(watcher);&#xD;            watcher.fixLayout();&#xD;        }&#xD;    }</l></block><list><block var="name"/></list></block></script></block></script></block-definition><block-definition s="hide var %&apos;name&apos;" type="command" category="variables"><comment x="0" y="0" w="181" collapsed="false">This block turns off (hide) the watcher view on stage (if it was not already activated) of the variable with the given name (slot input).&#xD;&#xD;It can only access to the closest variable scope (if there different variables with the same name in different scopes) following the order &apos;script&apos; -&gt; &apos;sprite&apos; -&gt; &apos;global&apos;.&#xD;&#xD;No errors if that variable does not exist.</comment><header></header><code></code><translations>ca:amaga la variable _&#xD;es:esconder variable _&#xD;pt:esconde a variável _&#xD;de:verstecke var _&#xD;</translations><inputs><input type="%s"><options>§_getVarNamesDict</options></input></inputs><script><block s="doIf"><custom-block s="does var %s exist?"><block var="name"/></custom-block><script><block s="doRun"><block s="reportJSFunction"><list><l>varName</l><l>proc</l></list><l>    // to delete all temporary watchers, use the primitive "hide" with no inputs&#xD;    var varFrame = proc.homeContext.variables,&#xD;        stage,&#xD;        watcher,&#xD;        target,&#xD;        name = varName;&#xD;&#xD;    if (name instanceof Context) {&#xD;        if (name.expression.selector === &apos;reportGetVar&apos;) {&#xD;            name = name.expression.blockSpec;&#xD;        } else {&#xD;            proc.doChangePrimitiveVisibility(name.expression, true);&#xD;            return;&#xD;        }&#xD;    }&#xD;    if (!name) {&#xD;        proc.doRemoveTemporaries();&#xD;        return;&#xD;    }&#xD;    if (proc.homeContext.receiver) {&#xD;        stage = proc.homeContext.receiver.parentThatIsA(StageMorph);&#xD;        if (stage) {&#xD;            target = varFrame.find(name);&#xD;            watcher = detect(&#xD;                stage.children,&#xD;                morph =&gt; morph instanceof WatcherMorph &amp;&amp;&#xD;                    morph.target === target &amp;&amp;&#xD;                        morph.getter === name&#xD;            );&#xD;            if (watcher !== null) {&#xD;                if (watcher.isTemporary()) {&#xD;                    watcher.destroy();&#xD;                } else {&#xD;                    watcher.hide();&#xD;                }&#xD;            }&#xD;        }&#xD;    }&#xD;</l></block><list><block var="name"/></list></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="false" hyperops="true" codify="false" inheritance="true" sublistIDs="false" 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