Variable Concatenation

[Dragon20942]

I'm just wondering if one can concatentate variables in Turing.

say if I wanted to cycle through wave1 - wave2 with a for loop, could I somehow

Turing:

var wave1 : array 0..4 of int := (1,2,3,4) var wave2 : array 0..4 of int := (4,3,2,1) for i 1..2      for j 0..4           put wave+i (j) %puts variables in wave1 before putting variables in wave2      end for end for

?

[Tony]

Quote:

puts variables in wave1 before putting variables in wave2

I don't understand what you are trying to ask.

[DemonWasp]

What you're asking about is typically called "variable variables", and while this feature occurs in a lot of scripting languages and "build languages", it's not common in "programming languages", like Turing. Turing does not possess this feature.

A "variable variable" is a (string) variable that contains the name of another symbol, which can then be evaluated to the value of the named variable. An example (looks like Turing but is NOT valid Turing):

code:

var variableName : string := "otherVariable" var otherVariable : array 1..3 of int := init ( 1, 2, 3 ) put $$variableName

Your example could be rewritten as:

Turing:

var wave : array 0..1, array 0..4 of int % init array contents... for i : 1..2      for j : 0..4           put wave ( (i+j) mod 2, j )      end for end for

[Dragon20942]

I was just asking if wave+i could be used as a concatenated variable with i still a functioning variable, thus outputting the values in wave1 and then outputting the varibles in wave2.

Oh and I made an error in declaring the arrays whoops!

Im saddened by a lack of variable concatenation, but am wondering how there can be two arrays in one variable.

[Tony]

If you read the docs for array, you'll see that "array min..max of TYPE" is a TYPE. By extension, you can have an array of arrays of ints.

[Dragon20942]

Ok, so each element in the "first array" has a "second array" in it, all of it being in one variable? That is interesting.
Is record the only way to stuff more than one array into another?

[Insectoid]

I record is convenient for storing multiple related variables of different types in an organized manner. Your program should be fine with a 2D array.

[Dragon20942]

Ok I was just wondering because I had originally planned to do variable concatenation, but ended up doing records instead. My program has since become a whole lot more complicated and anything other than a record would have made it less efficient. "wave" now has 14 arrays and 2 arrays of arrays within it.

[Tony]

Dragon20942 @ Fri Jan 21, 2011 8:43 pm wrote:

variable concatenation

You guys might get a kick out of this

code:

($=[$=[]][(__=!$+$)[_=-~-~-~$]+({}+$)[_/_]+($$=($_=!''+$)[_/_]+$_[+$])])()[__[_/_]+__[_+~$]+$_[_]+$$](_/_)

(add "javascript:" at the start and paste into the address bar to run)

with explanation at http://adamcecc.blogspot.com/2011/01/javascript.html

[TokenHerbz]

thats awesome tony