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+--- Thread: List commands and functions in HP program language (/thread-1134.html)
List commands and functions in HP program language - Alfon - 04-21-2014 05:37 PM
Is there a way to extract or insert an element from or into a list using HP prime programming language? Eg in a list {1,2,3,4,5,6} how would you extract element 4 and put it into a variable?
RE: List commands and functions in HP program language - eried - 04-21-2014 05:46 PM
Code:
local new_variable;
new_variable:=variable[item_number];RE: List commands and functions in HP program language - Alfon - 04-21-2014 08:08 PM
I tried this :
local var;
var:={1,2,3,4,5,}[4]
There is Syntax error?
RE: List commands and functions in HP program language - Han - 04-21-2014 08:29 PM
(04-21-2014 08:08 PM)Alfon Wrote: I tried this :
local var;
var:={1,2,3,4,5,}[4]
There is Syntax error?
Well, you do have an extra comma after the 5. Try this:
local var:={1,2,3,4,5};
local item:=var(4);
RE: List commands and functions in HP program language - Tim Wessman - 04-21-2014 08:49 PM
As for the reasoning as to why it only works once inside a variable, how would one distinguish between "multiply your list times a number" {1,2,3,4,5}*(4) and "get the 4th item in the list" {1,2,3,4,5}(4)?
When it has a name it then becomes a named setter/getter function internally.
RE: List commands and functions in HP program language - Alfon - 04-21-2014 08:57 PM
Yes this works! Thanks. Looks like you need the () around the element number and the list in a variable. Now how would you insert an element?? Is that possible?
RE: List commands and functions in HP program language - Tim Wessman - 04-21-2014 09:02 PM
Try the store operator...
var(4):="store"
Or if you prefer, you can use the "store"â–¶var(4) variant.
RE: List commands and functions in HP program language - DrD - 04-21-2014 11:02 PM
You may also like to check out the POS command:
nv:={1,2,3,4,5,6};
a:=POS(nv,4);
RE: List commands and functions in HP program language - Han - 04-22-2014 04:16 PM
You may also have nested lists, and can access them as follows:
list:={1,2,3,{4,5}};
item:=list(4,2); this stores 5 into the variable 'item'.