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[highmax28]

isNumeric and substr I don't think are part of javascript normally.  Maybe you were looking at jquery methods?

I looked it up and it said that the value turns up as a true/false, so I tried doing isNumeric(substr(username, index, index+1)) ==true && index==0, aaaaaand.... Still not working. Now the prompts don't even come up.

Seriously, this textbook is making me want to take a shotgun to it, because it claims there is a function called isLetter()

[Levi]

You might be able to replace isNumeric by not-ing isNaN().  And there is a substr method of string. 

"hello".substr(1,2);

[i2amroy]

Seriously, this textbook is making me want to take a shotgun to it, because it claims there is a function called isLetter()

isLetter() is a valid character function... in Java. It's not a valid one in javascript.

Are you sure you are reading a textbook about the right language you are trying to program in?

[highmax28]

Seriously, this textbook is making me want to take a shotgun to it, because it claims there is a function called isLetter()

isLetter() is a valid character function... in Java. It's not a valid one in javascript.

Are you sure you are reading a textbook about the right language you are trying to program in?

... I think I need to go email my teacher... This textbook is ALL kinds of messed up...

First it fails to provide proper examples of javascript and uses pseudocode for everything its supposed to explain. And I'm not the only one having problems with this assignment.

I'll keep bashing it until it works... Any idea the equivalent of isNumeric() in javascript?

[i2amroy]

I haven't made one myself, but you might want to check out this Stack Overflow thread.

[highmax28]

*looks at code, looks at your example*

*realizes that its IsNumeric(<garbage>) not isNumeric(<garbage>)*

*tries, still doesn't work*

Ok, now its saying this:

Code: [Select]

ReferenceError: IsNumeric is not defined usernameValidator.html:24:0
The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol.
I also realized how awful my organizing of my code is... 

[Mephisto]

IsNumeric() stuff...

Is the assignment maybe to write your own function called IsNumeric?

[Reelya]

The examples are of a hypothetical IsNumeric that you add to your own code as a function. It's not a built-in so it can be called whatever you like, isNumeric, IsNumeric, IsAFrikkinNumber. Since you're meant to make this shit up yourself (since JavaScript doesn't have it by default) the name is not the issue.

[highmax28]

The examples are of a hypothetical IsNumeric that you add to your own code as a function. It's not a built-in so it can be called whatever you like, isNumeric, IsNumeric, IsAFrikkinNumber. Since you're meant to make this shit up yourself (since JavaScript doesn't have it by default) the name is not the issue.

The question itself talked about it exactly being that, so... I had no idea that's what it meant. I'll start working on it then

[HavingPhun]

I'll just take the advice above and start my world generation with simple simplex noise, and build upon it from there. Also, the advice on trying to keep things simple. I can always come back later and make things more complex if needed.

[Reelya]

Instead of Voronoi polygons, you can also create seed points on a 2D grid and "grow" the regions from those points until all the cells are covered. This gives you jagged borders rather than lines. If you also slow the spread down based on terrain it should give you more realistic borders at places like rivers too. This sort of grid implementation would be simpler than the polygon-based one.

[HavingPhun]

Instead of Voronoi polygons, you can also create seed points on a 2D grid and "grow" the regions from those points until all the cells are covered. This gives you jagged borders rather than lines. If you also slow the spread down based on terrain it should give you more realistic borders at places like rivers too. This sort of grid implementation would be simpler than the polygon-based one.

That is a great idea, I will about implementing that once I get there. But, I hit a small obstacle. I am having trouble understanding the math when converting from the 2d grid to the array position. I have searched around and am still having troubles with it. I made a quick illustration to explain the way I am looking at it.

Spoiler (click to show/hide)

So, If the formula is:

Code: [Select]

(y-coordinate * WidthInColumns) + x-coordinate
Then using the above example, the coordinate (3,4) would be:

Code: [Select]

(4 * 5) + 3 = 23
But, if I am counting it in the right way, that would actually be 17 in the array. So what am I doing wrong? I know that the formula must be right because multiple examples on other websites show it in the same way. So am I counting the grid in the wrong way or what?

[Moghjubar]

So, If the formula is:

Code: [Select]

(y-coordinate * WidthInColumns) + x-coordinate
Then using the above example, the coordinate (3,4) would be:

Code: [Select]

(4 * 5) + 3 = 23
But, if I am counting it in the right way, that would actually be 17 in the array. So what am I doing wrong? I know that the formula must be right because multiple examples on other websites show it in the same way. So am I counting the grid in the wrong way or what?

If all else fails, math from 0 (or 1).  Lets attempt to get the first element (x = 1, y = 1, since you are starting at 1 of each instead of 0 ) using that formula, which should be 0.

(1*5) + 1 = 6.   6 != 0.  Only way to make it 0 is to take both X and Y and make them both 0... which involves subtracting 1 from each. 

Apply same logic to previous example:

Code: [Select]

(3*5) +2 = 17

[HavingPhun]

So, If the formula is:

Code: [Select]

(y-coordinate * WidthInColumns) + x-coordinate
Then using the above example, the coordinate (3,4) would be:

Code: [Select]

(4 * 5) + 3 = 23
But, if I am counting it in the right way, that would actually be 17 in the array. So what am I doing wrong? I know that the formula must be right because multiple examples on other websites show it in the same way. So am I counting the grid in the wrong way or what?

since you are starting at 1 of each instead of 0 )

Oh, so that is what they had done. I seem to be getting stuck on the most simple things. Once again, thank you for your help Moghjubar.

[Tylui]

Never feel bad about getting hung up on simple things! Simple doesn't mean obvious in a lot of cases, and you'll get better and better with every quirk you learn.