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JavaScript problem

Elias Y. Daoud shared this question 2 years ago
Answered

JavaScript makes me mad.

When I click on "Undo" (my custom button). The following goes in the process. And anything written as For(...){ ...} give me the error

"} bracket is missing" refer to the attachment

var pointsNb=ggbApplet.getValue("pointsNb");

for(var ti=0;ti<=pointsNb;ti++)

{

ggbApplet.evalCommand("DeleteObject(P"+String(ti)+")");

}

too, even if I make a simple one

...

for(var ti=0;ti<=pointsNb;ti++)

{

ti=ti+1;

}


Note: this configuration or similar loop I made in another button, no error is generated.

Something illogical.

look to this:

var pointsNb=ggbApplet.getValue("pointsNb");

for (var ti=0;ti<=pointsNb;ti++)

{

v2x=(-k*v1x*Math.sqrt(Math.pow(v1x,2)+Math.pow(v1y,2)))*dt+v1x;

v2y=(-k*v1y*Math.sqrt(Math.pow(v1x,2)+Math.pow(v1y,2))-g)*dt+v1y;

....

...

}

It works properly.

Files: Geogebra bracke...
2 The same question

Comments (12)

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1
Michael Borcherds ● 2 years ago

Please always post your .ggb file

photo
1
Elias Y. Daoud ● 2 years ago

Upload it you mean? OK

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1
Elias Y. Daoud ● 2 years ago

Here it is

Files: Projectile_air...
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1
Michael Borcherds ● 2 years ago

These two lines are swapped. Stick with ggbApplet then it will be clearer 

ggb.setUndoPoint();

var ggb = ggbApplet;

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1
Elias Y. Daoud ● 2 years ago

I am not using setUndoPoint() I put before // as a comment because it is not working or I don't know-how.

Actually I don't need it anymore

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1
Elias Y. Daoud ● 2 years ago

But since no space to work with Javascript as other editors, I am not explaining in the.

Can we write our JavaScript in an editor, let to say notepad or JavaEdito or any, and upload it by Geogebra script?

Maybe we should add it as a package or import? So this can help me to more organize my program

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2
Michael Borcherds ● 2 years ago

Exactly, try Notepad++ then it shows you which brackets match etc


/1VBPz0xyI7oAAAAASUVORK5CYII=

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1
Elias Y. Daoud ● 2 years ago

My problem is not with this code in this question. but in my last reply.

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1
Michael Borcherds ● 2 years ago

Using a list in GeoGebra (and then eg Sequence()) will be much better than doing this in JavaScript 

ggb.evalCommand("P" + String(ti) + "=" + "(" + X2 + "," + Y2 + ")");
ggb.setCaption("P" + String(ti), "");
ggb.setPointSize("P" + String(ti), 1);
ggb.evalCommand("ShowLabel(P" + String(ti) + ",false)");

photo
1
Elias Y. Daoud ● 2 years ago

no problem with that, already my code working

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1
Elias Y. Daoud ● 2 years ago

My question above is solved as:

var pointsNb=ggbApplet.getValue("pointsNb");

for(var ti=0;ti<=pointsNb;ti++)

{

ggbApplet.evalCommand("Delete(P"+String(ti)+")");

}


You can mark my question as answered

photo
1
Elias Y. Daoud ● 2 years ago

Solved as

var pointsNb=ggbApplet.getValue("pointsNb");

for(var ti=0;ti<=pointsNb;ti++)

{

ggbApplet.evalCommand("Delete(P"+String(ti)+")");

}

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