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2013-06-07T15:00:07.363
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Here are some methods that do not require manually escaping the perl statement: (Disclaimer: I'm not sure how robust these are – they haven't been tested extensively) <ol> <li>Cat-in-the-bag technique <pre><code>perl -ne "$(cat)" text </code></pre> You will be prompted for input. To terminate <code>cat</code>, press <kbd>Ctrl</kbd>-<kbd>D</kbd>. One shortcoming of this: The perl statement is not reusable. This is addressed by the variation: <pre><code>$pline=$(cat) perl -ne "$pline" text </code></pre> </li> <li>The bash builtin, <code>read</code> Multiple lines: <pre><code>read -rd'^[' pline </code></pre> Single line: <pre><code>read -r pline </code></pre> Reads user input into the variable <code>pline</code>. The meaning of the switches: <ul> <li><code>-r</code>: stop <code>read</code> from interpreting backslashes (e.g. by default <code>read</code> interprets <code>\w</code> as <code>w</code>)</li> <li><code>-d</code>: determines what character ends the <code>read</code> command. <ul> <li><code>^[</code> is the character corresponding to <kbd>Esc</kbd>, you insert <code>^[</code> by pressing <kbd>Ctrl</kbd>-<kbd>V</kbd> then <kbd>Esc</kbd>. </li> </ul></li> </ul></li> <li>Heredoc and script. (You said no scripts, but this is quick and dirty, so might as well...) <pre><code>cat << 'EOF' > scriptonite print $1 . "\n" if /'(\w+)'/ EOF </code></pre> then you simply <pre><code>perl -n scriptonite text </code></pre></li> </ol>
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