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Did you try your code?

One cannot use next or last inside a do { ... } block. As the docs say : "contrary to popular belief do{} blocks, which do NOT count as loops".

It is not a loop, so you cannot use loop-control commands. You can double the curly braces and put a bare block inside the do { ... } block. Bare blocks are loops that execute once. The loop-control commands will work ... somewhat, but last will not do as you might expect: it will exit the inner (bare) block, only to fall into the outer (do) block and hence has the same effect as next.

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

My blog: Imperial Deltronics

In reply to Re^2: matching datetimestamps and concatenating data where timestamps match from multiple large datafiles by CountZero
in thread matching datetimestamps and concatenating data where timestamps match from multiple large datafiles by Cosmic37

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