I'm just learning J so this is a bit of a newbie question.
1) I open up the J session window
2) I type in a definition of a verb from the Learning J document - Chapter 12...
dog =: 3 : 0
if. y>90 do. 'too hot'
elseif. y<30 do. 'too cold'
elseif. 1 do. 'OK'
end.
)
It's the porridge - too hot - too cold - example - I called it dog
Now I want to go back in and change the parameters a bit - for example I want
to make too cold be < 40 not 30.3) I put the cursor in the definition and
change the 30 to a 40
4) With the cursor I select the entire definition and then copy it with a CTRL-C
5) I hit he enter key until I get the waiting for input cursor down below
everything
6) I paste in the modified definition with a CTRL-V and hit enter
7) I get a syntax error message.
I can't believe that one must re-type the entire definition just to make a
change. What am I doing wrong?
Dan
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