topic Re: Associative Array from variables in Discussions

Associative Array from variables

miguello — Fri, 09 Jun 2023 17:00:35 GMT

Can somebody help me with a correct syntax to create Associative Array from variables?

Now I have this:

a = {"a1", "a2", "a3"};
b = {"b1", "b2", "b3"};

AB = [
	"AA" => a,
	"BB" => b
];

AB["AA"];

It returns:

/*:

a

I want it to return:

/*:

{"a1", "a2", "a3"}

I tried different combinations of Eval List(), Eval Expr(), Expr() and Eval(), but no luck.

Thanks!

Re: Associative Array from variables

Jasean — Fri, 03 Jun 2022 21:29:51 GMT

AB = Associative Array(EvalList({a, b}))

Re: Associative Array from variables

miguello — Fri, 03 Jun 2022 22:09:13 GMT

This does not produce the desired result. Keep in mind, keys are "AA" and "BB", and values for those keys are lists a and b, respectively.

But it got me on the correct track, so this works as intended:

a = {"a1", "a2", "a3"};
b = {"b1", "b2", "b3"};


keys = {"AA", "BB"};
values = Eval List({a, b});


AB = Associative Array({keys, values});

AB["AA"];

Thanks!

P.S. Actually it doesn't work either.

I can't understand how JMP decides which one to use if my values are lists too??

//Create an associative array from a list that contains two lists of a key-value pair:

map = Associative Array( {{"yes", 0}, {"no", 1}} );

//Create an associative array from a list of keys and a list of values:

map = Associative Array( {"yes", "no"}, {0, 1} );

Re: Associative Array from variables

miguello — Fri, 03 Jun 2022 22:14:48 GMT

Had to go brute force way for now:

AB = Associative Array();
AB["AA"] = Eval List(a);
AB["BB"] = Eval List(b);

Re: Associative Array from variables

ErraticAttack — Sat, 04 Jun 2022 00:59:30 GMT

You almost had it! You need to input the arguments to Associative Array() as Associative Array( keys, values ), instead of Associative Array( {keys, values} ),

a = {"a1", "a2", "a3"};
b = {"b1", "b2", "b3"};


keys = {"AA", "BB"};
values = Eval List({a, b});


AB = Associative Array(keys, values);

AB["AA"];