AS3 using Arrays

I'm just starting basic coding and programing using AS3 to make a platformer game. I understand how to make objects and platforms but am a little confused on how to implement arrays to make a level. I understand arrays are like a call method but I doubt that every level has a wall of numbers dictating where the terrain goes like the 1's and 0's in the link.
http://www.flashgametuts.com/tutorials/as3/how-to-create-a-platform-game-in-as3-part-2/
 
Could you guys help me understand how arrays work in a level editor to make a long/large map?
And also how vectors are used in arrays to make slopes and arcs in a platformer?

This is not a beginner programming help forum.

I understand arrays are like a call method
wat

every level has a wall of numbers dictating where the terrain goes like the 1's and 0's in the link.
actually it is.

Too bad AS is shit for faggots.

Too bad AS3 is like Java (but even slower!)