How can get matching data directly from memory variables？

Question

How can get name="JOHN" matching "height" data directly from memory variables"

Thanks!

dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
na="JOHN";//How can get matching "height" data directly from memory variables
hei=Update(With(dt),Match Columns(:name=na),Add Columns from Update table(:height));

txnelson · Accepted Answer

Here is one method

names default to here(1);
dt=open("$SAMPLE_DATA/big class.jmp");

vals=Associative Array(dt:name,dt:height);

hei=vals<<getvalue("JOHN");