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DarkBASIC Professional Discussion / Question about Find Sub String$ command

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GregA
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Joined: 21st Jun 2011
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Posted: 18th Jul 2012 10:35
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When if fails to find a substring, rather than returning something I expect like -1 it returns a giant negative number like... -1232123 or something like that.

What does that number mean, if anything?
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Rudolpho
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Posted: 19th Jul 2012 12:46 Edited at: 19th Jul 2012 12:48
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It could be the decimal representation of one of the magic debug values or something similar. Possibly it's the signed representation of 0xffffffff (which would be the maximum value for an unsigned 32-byte integer) or something similar.

Edit: as long as its consistently negative you can check if the string exists using "if find substring(str$, substr$) > 0".


"Why do programmers get Halloween and Christmas mixed up?"
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Green Gandalf
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Joined: 3rd Jan 2005
Playing: Malevolence:Sword of Ahkranox, Skyrim, Civ6.
Posted: 19th Jul 2012 21:09 Edited at: 19th Jul 2012 21:10
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The value seems to depend on the input strings and on the ordering of the commands in some not very obvious way - but it does seem that the reported value is always negative when the string isn't present so your suggestion seems to be the way to do it. Perhaps it's a pointer value?

That's a good example of the sort of detail missing from the Help file.
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