Explanation of BeforeReadingRecords, WhileReadingRecords, WhitePrintingRecords and EvaluateAfter
I understand this may not be an easy question to answer briefly but I'll ask anyway. I was just wondering if someone could tell me about the 'BeforeReadingRecords', 'WhileReadingRecords', 'WhilePrintingRecords' and 'EvaluateAfter' constructs in Crystal. I've seen them used in lots of reports but I'm yet to use them myself as I don't fully understand their usage.
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