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- <h3 class="subsection">2.5.2 Line Maps</h3>
- <a name="index-line_002dmap-command-line-option-2"></a>
- <p>Virtual code applications invoked with the ‘<samp>--line-map</samp>’ option
- (with or without the ‘<samp>--unparameterized</samp>’ option) adhere to a very
- simple interface.
- </p>
- <ul>
- <li> The argument to the function is a character string, and the result
- must also be a character string.
- </li><li> The function is applied to each line of the standard input file
- <a name="index-standard-input-7"></a>
- and the result in each case is written to standard output followed by a
- <a name="index-standard-output-1"></a>
- line break.
- </li></ul>
- <a name="index-infinite-streams-1"></a>
- <p>This kind of application may be used on finite or infinite streams,
- provided that the lengths of the lines are finite, but preserves no state
- information from one line to the next.
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