I've looked around a bunch into finding out exactly what it is that this command does (The only things I found were programs that used it, and explained what it did in the program, but not the command itself), and i've even used it in a few of my files, but never really knew what it did, just how to use it.
But what does it do..?
an ipair is a stateless iterator. ipairs iterates over all elements in an array.
http://www.lua.org/pil/7.3.html
Code:
a = {"one", "two", "three"}
for i, v in ipairs(a) do
print(i, v)
end
Are i and v previously declared with a value?
Or is i considered the beginning of the table, and v the end, using ipairs?
i will be the index, and v will be the value. So during that loop i would be 1, 2, 3, and v would be "one","two","three". Basically, each iteration of the loop, i and v get the next value of the index and value in the table, respectively.
Ah. I had guessed that the for loop was like others, and meant "for i to reach v do this."
Lua's awesome :3
Let's say I had:
Code: local enemy = {}
enemy.x = math.random(8, 800-8)
enemy.y = 8
table.insert(tableofenemies, enemy)
Would:
Code: for i, v in ipairs(tableofenemies) do
-- Display the enemy here, using love.
love.graphics.draw(enemyimage, enemy.x, enemy.y)
end
Work as displaying the enemy saved into the table?
No, I wouldn't expect so. First of all, you're not using
i or
v in your loop. You use
enemy and
enemyimage which aren't defined. If
enemyimage is already known, something like this would be better:
Code: for i, enemy in ipairs(tableofenemies) do
-- Display the enemy here, using love.
love.graphics.draw(enemyimage, enemy.x, enemy.y)
end
A big thanks, shaun & PCB. Soon i'll be doing alot more, I got my strive for programming back!
Here's some snow, that I worked a little on, and i'll be playing around with snow and such until I know I can put together a game.
Again, thanks a bunch.
(I did this on a Mac, provided by my school, so to run it, if you want, you'll have to download love2d.
http://www.love2d.org)
https://www.dropbox.com/s/jqqeqsakme1kkzz/Snow.love
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