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Reading a file backwards |
Pipelines v1.6 |
.* Example by TenFiftyTwo(c). |
.* The following pipeline illustrates the most efficient way to select records that you know.* lie toward the end of a large input file. By reading the file in reverse record order; the.* target records can be located without unnecessarily traversing a significant portion of.* the file. .* This approach may be of particular use when extracting data from large 'log-type' files. pipe < rev &installdrive:\&installpath\Examples\Input\NYSE-Tick.txt
| inside zone(w2) /134700/ /134200/ .* Select the block of records. | buffer rev .* Reverse the records. | cons .* Display the records on the console.