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How to avoid a lot of @equals

 
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Skit3000
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Joined: 11 May 2002
Posts: 2166
Location: The Netherlands

PostPosted: Fri Apr 01, 2005 7:18 am    Post subject: How to avoid a lot of @equals Reply with quote

If you have a word and you want to check if it's value is "A", "B", "C", "D" or "M", you normally need a lot of @equal functions to do this. It makes your code unreadable and it will become quite long.

To avoid this problem, you can use the @pos function to check if the word is in the string "|A|B|C|D|M|". If so, the @pos function will return a value greater than zero. If you like, you can combine the @pos function with the "EXACT" parameter.

The first example shows how such a "A" or "B" or "C" statement looks like:

Code:
%%word = duck

if @equal(%%word, cow) @equal(%%word, chicken) @equal(%%word, duck) @equal(%%word, pig) @equal(%%word, bird) @equal(%%word, sheep) @equal(%%word, cat) @equal(%%word, dog) @equal(%%word, ape)
  info Done
end


The second shows how you can reduce all above code to some smaller one:

Code:
%%word = duck

if @greater(@pos(|%%word|,|cow|chicken|duck|pig|bird|sheep|cat|dog|ape|),0)
  info Done
end

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Skit3000
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Joined: 11 May 2002
Posts: 2166
Location: The Netherlands

PostPosted: Fri Apr 01, 2005 7:25 am    Post subject: Reply with quote

Another tip on how to avoid a lot of @both functions if you want to check if the first @equal is true, the second one is true, etc:

Code:
rem The "normal" way
if @both(@both(@both(@both(@both(@both(@both(@equal(1,1),@equal(2,2)),@equal(3,3)),@equal(4,4)),@equal(5,5)),@equal(6,6)),@equal(7,7)),@equal(8,Cool)
  info Done
end


Code:
rem This way, the results of the @equals are examined as a string, so you don't need a lot of @boths Smile
if @equal(@equal(1,1)@equal(2,2)@equal(3,3)@equal(4,4)@equal(5,5)@equal(6,6)@equal(7,7)@equal(8,Cool,11111111)
  info Done
end


If you want not all the @equals to be true, but some of them (for example 2) may be false, you can change the "11111111" into "111111"... Smile

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Skit3000
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Joined: 11 May 2002
Posts: 2166
Location: The Netherlands

PostPosted: Fri Apr 01, 2005 7:34 am    Post subject: Reply with quote

Here is an example which combines the two methods shown above. It check if "A is A" and "B is not C", etc., without having to do a lot of @boths... Smile

Code:
rem Old method
if @both(@both(@both(@both(@equal(Jack,Jack),@not(@equal(duck,cow))),@equal(1,1)),@not(@equal(sheep,dog))),@not(@equal(text,book)))
  info Done
end


Code:
rem New method, use || for false and |1| for true:
if @equal(|@equal(Jack,Jack)|@equal(duck,cow)|@equal(1,1)|@equal(sheep,dog)|@equal(text,book)|, "|1||1|||")
  info Done
end

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Serge
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Joined: 04 Mar 2002
Posts: 1480
Location: Australia

PostPosted: Sat Apr 02, 2005 1:11 am    Post subject: Reply with quote

excellent work there skit Smile

serge

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FreezingFire
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Joined: 23 Jun 2002
Posts: 3508

PostPosted: Sun Apr 03, 2005 9:39 pm    Post subject: Reply with quote

Nice job Thumbs Up
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