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performing loop operation in Transform

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performing loop operation in Transform

I have been working with Ab initio and I have lot of XFR's in reformat which perform loop operations as we have vectors(arrays) in the flat file. I am not able to find a way to implement the same in Talend. It would be great if someone could help me in this regard.
In addition to this when we do rollup we use expanded version and perform operations on the records when we are aggregating. I am unable to implement this feature also in Talend. Please help
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Re: performing loop operation in Transform

Hi,
Could you please elaborate your case with an example with input and expected output values?
Best regards
Sabrina
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