How to remove an item from a list? [SOLVED] - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: How to remove an item from a list? [SOLVED] (/thread-7087.html) |
How to remove an item from a list? [SOLVED] - cclinus - 10-22-2016 07:52 AM Hi, This is my list: {0, {0,1,2},{0,1,2}} I want to remove the last item {0,1,2} from the list but keep the first two items. How? end result should be {0, {0,1,2}} I had read some command such as DELCOL(only work with matrix), remove(can not keep one {0,1,2} in the list. Thanks! RE: How to remove an item from a list? - Didier Lachieze - 10-22-2016 09:07 AM I don't think there is a built-in command to remove an item from a list. Here is a small program to do it : Code: EXPORT Remove(l,n) //remove item n from list l RE: How to remove an item from a list? - StephenG1CMZ - 10-22-2016 09:28 AM http://www.hpmuseum.org/forum/thread-7001.html is also a useful library of list-handling procedures in the software library. Suggested enhancement to the syntax: To remove an item from the end of the list, the simplest and most obvious syntax would be SIZE(Let):=SIZE(Let)-1 But SIZE(Let):= Is not currently supported. RE: How to remove an item from a list? - DrD - 10-22-2016 10:02 AM You could use this syntax: {0, {0,1,2},{0,1,2}}; // Original list SUB({0, {0,1,2},{0,1,2}},1,2); // End result desired ==> {0, {0,1,2}} -Dale- RE: How to remove an item from a list? - cclinus - 10-22-2016 11:23 AM Hi Dale, Thanks! But it is partially work. If I assign a:={0,{0,1,2},{0,1,2}} Then SUB(a,1,2) IN Home mode , it is ok. But if in CAS mode, It display Error: Invalid dimension. How to make it work in CAS mode? FINALLY, I find a way to make it work in CAS mode. EXPR("SUB(a,1,2)"); TOO BAD, it seems doesn't work in cas program when "a" is local variable. Thanks! RE: How to remove an item from a list? - CH3791 - 10-22-2016 11:53 AM Perhaps you can also consider a CAS program? http://www.hpmuseum.org/forum/thread-3590.html If you can always access/mostly use CAS, I think they are a much better choice than normal programs. It's more straightforward to program and it accepts your input with all the symbolic representation (ie doesn't convert things like pi to decimal). RE: How to remove an item from a list? - DrD - 10-22-2016 01:15 PM (10-22-2016 11:23 AM)cclinus Wrote: If I assign a:={0,{0,1,2},{0,1,2}} Try using lower case sub instead of SUB, in CAS: sub(a,1,2); ==> end result in CAS. Also, you might like to use list variables L0..L9. -Dale- RE: How to remove an item from a list? - cclinus - 10-23-2016 06:28 AM Hi Dale, Thanks! It works. sub(a,1,2); //OK Regards, |