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Topic: Liberty BASIC v4.5 (Beta 3) (Read 1129 times) |
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Richey
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Liberty BASIC v4.5 (Beta 3)
« Thread started on: Nov 12th, 2014, 10:36pm » |
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Richard, I understand that you will not update LBB with some of the new in-built functions found in LB v4.5 (Beta 3) in order to avoid adding unnecessary 'bloat' to LBB.
Would you instead be able to publish equivalent user-defined functions for some of the new features found in LB v4.5 (Beta 3)?
Thank you in advance.
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Richard Russell
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Re: Liberty BASIC v4.5 (Beta 3)
« Reply #1 on: Nov 13th, 2014, 09:35am » |
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on Nov 12th, 2014, 10:36pm, Richey wrote:| Would you instead be able to publish equivalent user-defined functions for some of the new features found in LB v4.5 (Beta 3)? |
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I'm mystified that Carl thinks the new string manipulation functions are worthwhile, when they can be trivially implemented as user-defined functions. I would far rather he had spent the time fixing bugs and/or adding features that genuinely extend the capabilities of LB (LBB should have given him some ideas!).
Anyway, here are replacements which should work in LB 4.04 and LBB:
Code:function upto$(sourceString$, search$)
i = instr(sourceString$, search$)
if i then upto$=left$(sourceString$,i-1) else upto$=sourceString$
end function
function after$(sourceString$, search$)
i = instr(sourceString$, search$)
if i then after$ = mid$(sourceString$,i+len(search$))
end function
function afterlast$(sourceString$, search$)
do : i = j
j = instr(sourceString$, search$, j+1)
loop until j = 0
if i then afterlast$ = mid$(sourceString$,i+len(search$))
end function
function endswith(sourceString$, search$)
endswith = right$(sourceString$,len(search$)) = search$
end function
function remchar$(sourceString$, removeThese$)
remchar$ = sourceString$
for i = 1 to len(removeThese$)
do
j = instr(remchar$, mid$(removeThese$,i,1))
if j then remchar$ = left$(remchar$,j-1);mid$(remchar$,j+1)
loop until j = 0
next
end function
Richard.
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tsh73
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Re: Liberty BASIC v4.5 (Beta 3)
« Reply #2 on: Nov 13th, 2014, 8:16pm » |
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LOL
me guess that Carl work[ed] on something benefiting faster string functions.
Anyway, thanks for UDF - I'll save this little snippet for using with JB (likely, I will end porting something something LB45 to JB)
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| « Last Edit: Nov 13th, 2014, 8:17pm by tsh73 » |
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Richard Russell
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Posts: 1348
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Re: Liberty BASIC v4.5 (Beta 3)
« Reply #3 on: Nov 13th, 2014, 9:39pm » |
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on Nov 13th, 2014, 8:16pm, tsh73 wrote:| me guess that Carl work[ed] on something benefiting faster string functions. |
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Certainly the native remchar$ in LB 4.5 is a lot faster than the equivalent UDF:
LB v4.5 beta 3 (native function): 45 ms
LBB v2.72 (UDF): 130 ms
LB v4.04 (UDF): 4190 ms (note that in this case LBB runs more than 30 times faster than LB 4.04!!).
But the other functions don't show a significant speed benefit, for example after$:
LB v4.5 beta 3 (native function): 240 ms
LBB v2.72 (UDF): 30 ms
LB v4.04 (UDF): 285 ms (there's little difference between the native function and the UDF when running in LB, but LBB is 8 times faster).
Richard.
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Richey
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Posts: 14
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Re: Liberty BASIC v4.5 (Beta 3)
« Reply #4 on: Nov 15th, 2014, 06:43am » |
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on Nov 13th, 2014, 09:35am, Richard Russell wrote:I'm mystified that Carl thinks the new string manipulation functions are worthwhile, when they can be trivially implemented as user-defined functions. I would far rather he had spent the time fixing bugs and/or adding features that genuinely extend the capabilities of LB (LBB should have given him some ideas!).
Anyway, here are replacements which should work in LB 4.04 and LBB:
Code:function upto$(sourceString$, search$)
i = instr(sourceString$, search$)
if i then upto$=left$(sourceString$,i-1) else upto$=sourceString$
end function
function after$(sourceString$, search$)
i = instr(sourceString$, search$)
if i then after$ = mid$(sourceString$,i+len(search$))
end function
function afterlast$(sourceString$, search$)
do : i = j
j = instr(sourceString$, search$, j+1)
loop until j = 0
if i then afterlast$ = mid$(sourceString$,i+len(search$))
end function
function endswith(sourceString$, search$)
endswith = right$(sourceString$,len(search$)) = search$
end function
function remchar$(sourceString$, removeThese$)
remchar$ = sourceString$
for i = 1 to len(removeThese$)
do
j = instr(remchar$, mid$(removeThese$,i,1))
if j then remchar$ = left$(remchar$,j-1);mid$(remchar$,j+1)
loop until j = 0
next
end function
Richard.
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Thank you Richard. Your work is very much appreciated.
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Richard Russell
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Posts: 1348
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Re: Liberty BASIC v4.5 (Beta 3)
« Reply #5 on: Nov 17th, 2014, 11:25am » |
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Another issue with adding the new native functions is that their names (upto$, after$ etc.) become invalid names for user-defined functions or arrays. So any existing program which happens to contain a function or array with one of those names - or indeed a program using one or more of my UDF replacements - will fail to compile.
Fortunately if you're an LBB user there's a workaround - put the UDFs I've listed above in a separate file which you 'include' in your program. Then when run in LB 4.5 the 'include will be ignored and the native function(s) used, whereas in LBB the 'include will be actioned and the user-defined function(s) used.
Richard.
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Richard Russell
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Posts: 1348
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Re: Liberty BASIC v4.5 (Beta 3)
« Reply #6 on: Nov 21st, 2014, 5:39pm » |
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A fundamental requirement of a typical Windows application is that anything that can be done using the mouse has a keyboard equivalent. For example menu selections can be made using Alt-key shortcuts, and the 'right click' context menu can be brought up by pressing Shift+F10. This can be particularly important for users with disabilities.
I have been trying to find a keyboard equivalent for the new Ctrl+left-click navigation aid in LB 4.5, which allows you to jump directly to a label, subroutine or function in the program. But I can't find a way of doing it without the mouse. Does anybody know if it is possible? The 'disability discrimination' campaigners won't be happy if it isn't. 
Richard.
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Richard Russell
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Re: Liberty BASIC v4.5 (Beta 3)
« Reply #7 on: Jan 6th, 2015, 1:23pm » |
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on Nov 13th, 2014, 09:35am, Richard Russell wrote:| Anyway, here are replacements which should work in LB 4.04 and LBB: |
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Carl is now proposing that yet another (in my opinion unnecessary) native string function be added to LB 4.5: replstr$. Here is a user-defined function which provides the same functionality:
Code:FUNCTION replstr$(s$, search$, replace$)
DO
i = INSTR(s$, search$, i)
IF i THEN
s$ = LEFT$(s$, i - 1); replace$; MID$(s$, i + LEN(search$))
i = i + LEN(replace$)
END IF
LOOP UNTIL i = 0
replstr$ = s$
END FUNCTION
As discussed previously, to maintain the best compatibility between LBB and LB4.5 put the replacement string functions in a separate file (e.g. strfuncs.bas) and 'include that in your program's code.
When running in LB 4.5 the 'include will be ignored and the new native functions will be used, and when running in LBB the 'include will be actioned and the UDF versions will be used instead.
Richard.
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