Re: "case" or better? (2.6 suggestion mode)
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> <DIV>In a message dated 4/3/2005 11:47:32 A.M. Mountain Standard Time,
> guest at RapidEuphoria.com writes:</DIV>
> <BLOCKQUOTE
> style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
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> style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size=2>The
> programer does the evaluating when <BR>> the program is written
> instead of the machine each time the program is<BR>> executed.<BR>>
> <BR><BR>Very interesting, please elaborate. I am having trouble
> understanding
> how<BR>this would work if a decision had to be made at run-time.<BR><BR>This
>
> seems common in
> Forth:<BR><BR><a
> href="http://pfe.sourceforge.net/4thtutor/4thl3-3.htm">http://pfe.sourceforge.net/4thtutor/4thl3-3.htm</a><BR><BR>However,
>
> Forth still has if-else.<BR></FONT></BLOCKQUOTE></DIV>
> <DIV></DIV>
> <DIV>Oh my :) I am brand new to Euphoria and have done most of my
> programming in Forth. I once wrote a program to help learn Morse code.
> Originally, I used an if/elsif sequence as follows </DIV>
> <DIV>if c = 'e' or 'E' then</DIV>
> <DIV> dit()</DIV>
> <DIV>elsif c = 't' or 'T' then</DIV>
> <DIV> dah()</DIV>
> <DIV>elsif c = 'i' or 'I' then</DIV>
> <DIV> di() dah()</DIV>
> <DIV>... etc</DIV>
> <DIV> </DIV>
> <DIV>Then I saved a little space and time by converting alpha characters to
> uppercase.</DIV>
> <DIV>This cut the program size and increased its speed a little</DIV>
> <DIV> </DIV>
> <DIV>Next I decided to try vectored execution. I defined each letter, aa() =
> di
> dah, bb() = da di di dit, ... etc. I then put aa() in position 65, bb() in
> position 66, etc in a table. noop was placed in each location for which there
> was no Morse code symbol. Sending the letter 'a' became code_table['a']</DIV>
> <DIV> </DIV>
> <DIV>Finally, I got rid of the "aa() = di dah" etc statements. I converted
> them
> to binary numbers that represented dits and dahs. A dit was a '0' and a dah
> was
> a '1'. 'A' became 110, 'b' was 10001, 'e' was 10, 't' was 11, etc. I worked
> out
> the numbers and stored them in a table. In Euphoria, they would be stored as a
>
> sequence. This reduced the program size and kept the speed. (For the curious,
> the numbers were read from right to left. The most significant bit said that
> a code symbol was represented. The numbers were shifted left after each
> read and when c / 2 = 0 conversion was completed.)</DIV>
> <DIV> </DIV>
> <DIV>I then learned that the program read text files as easily as it read
> keyboard input. I now wrote a program that I could use on Amateur Radio I
> hated
> using a key to send Morse code but could type fairly well. The program sent
> perfect code which could never be said about me.</DIV></FONT></BODY></HTML>
>
Please POST TEXT ONLY on EUforum !!!
Bernie
My files in archive:
w32engin.ew mixedlib.e eu_engin.e win32eru.ew
Can be downloaded here:
http://www.rapideuphoria.com/cgi-bin/asearch.exu?dos=on&win=on&lnx=on&gen=on&keywords=bernie+ryan
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