How to remove marker on google maps once another marker is placed

[leviocsmithk]

Ok, I will try that out

Many Thanks Levi

[leviocsmithk]

That idea almost works except is it still difficult to work out which marker is the most recent from the user’s perspective, is there a way I can make the marker be green for example when it is the most recent, the change to red after a new marker has been placed?

Many Thanks Levi

[leviocsmithk]

Here is a photo of what it looks like now:

[leviocsmithk]

See how it looks a bit random.

[leviocsmithk]

Here is what the code looks like:

[tatiang]

In your count with i loop, you’re cycling through all of the lat/lon values and adding markers. But the last row in the data source contains the most recent/current location. So in that loop, add an If block that says if i=length of app variable latlist then set pinColor to green (or whatever color)… else set pinColor to black (or whatever color).

[leviocsmithk]

Ok thanks for the info, I will try that out today.

Many Thanks Levi

[leviocsmithk]

So I add what you said here correct?

[tatiang]

Yes.

[leviocsmithk]

I have tried what you have said but it does not let me connect the blocks together?

[leviocsmithk]

What Part of it am I doing wrong?

[leviocsmithk]

I have tried to do what you have said here, but it does not seem to let me add the colour part.

[leviocsmithk]

Or should I try something like this:

I have no idea if that will work.

[tatiang]

You’re on the right track but if you read my post carefully, the If condition I suggested is i = length of app variable latlist. In that last screenshot, you have the If condition as length of i = app variable latlist. That won’t work.

The point of checking the value of i is that it’s the loop index. So when i is equal to the length of the list that you are looping through, that means you’ve reached the last item in the list.

[leviocsmithk]

So should I swap them around like this:

[tatiang]

Nope, that’s still the same thing. You just switched the sides of the same equation. Here’s what you need:

[leviocsmithk]

Oh, Ok, Thanks, I will try that.

[leviocsmithk]

Do I keep both of the blocks to place markers?

[tatiang]

Yes. Because the if condition has two possible values: true or false. So if true, then you’ll create a marker with a green pin; and if false, then you’ll create a marker with a red pin.

[leviocsmithk]

Cool, thanks also do I need to change anything on the first marker to do with the lat and long, or should I keep them as they are on 0?