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compare string to empty inversed

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I'm trying to compare a string to an empty string. When the string is NOT empty, a counter should increment. First I tried to do this with a not contact between the compare and the increment, this gave the problem that it kept incrementing. It didn't stopped after one runtime it kept going. Does someone know a better inverse method?


One ugly solution that I have found is to increment before the compare and decrement if it is true. Does anyone have better options?

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