Inserting value in between an array in action script3.0

Question

I am inserting a value on 3 position the value is being inserted but somehow while copying the rest part it does not copy the last point. The size of an array is not increasing. Can anyone tell me how to add new elements in an array in between.

for(indexpoint=0;indexpoint<3;indexpoint++) 
{           
    temp.points[indexpoint].x = intpoints[indexpoint].x+this.x;
    temp.points[indexpoint].y = intpoints[indexpoint].y+this.y; 
}

temp.points[3].x = (intpoints[2].x+intpoints[3].x)/2+this.x;
temp.points[3].y = (intpoints[2].y+intpoints[3].y)/2+this.y;

for(indexpoint=3;indexpoint<intpoints.length;indexpoint++)
{           
    temp.points[indexpoint+1].x = intpoints[indexpoint].x+this.x;
    temp.points[indexpoint+1].y = intpoints[indexpoint].y+this.y;       
}

Benoît Guédas · Accepted Answer · 2013-02-14 09:13:53Z

2

To insert new elements in an array, you can use the method splice(), but first, you have to create the object that you want to add (it looks like a Point in your code):

const point:Point = new Point();
point.x = intpoints[2].x+intpoints[3].x)/2+this.x;
point.y = intpoints[2].y+intpoints[3].y)/2+this.y;

temp.points.splice(3, 0, point);

You could also do this:

temp.points.length = 0;

for each (var point:Point in intpoints) {
    temp.points.add(point.clone().add(this));
}

const newPoint:Point = new Point();
newPoint.x = intpoints[2].x+intpoints[3].x)/2+this.x;
newPoint.y = intpoints[2].y+intpoints[3].y)/2+this.y;
temp.points.splice(3, 0, newPoint);

edited Feb 14, 2013 at 9:13

answered Feb 13, 2013 at 22:33

Benoît Guédas

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2 Comments

user1733735 Over a year ago

I did this,now what happens it duplicates the last point three times at the end of the array.

Benoît Guédas Over a year ago

What is temp, and are you sure that intpoints.length === temp.points.length before the first loop? Why don't you start with an empty array that you fill with your values?

khailcs · Accepted Answer · 2013-02-13 22:37:40Z

0

Why not just use the splice function?

array.splice( positionToInsertIn, 0, newValue );

answered Feb 13, 2013 at 22:37

khailcs

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1 Comment

user1733735 Over a year ago

I did this,now what happens it duplicates the last point three times at the end of the array

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