Yelt

<h1>Yelt</h1>

Yelt is a streaming text editor, like its older cousing, SED.  Yelt
could be described as "SED -- the next generation" because is essentially
SED plus features not present in SED, like:

<ul>
    <li> 10 variables, not just the 2 that you get with SED.
    <li> more control over the whole script:
	<ul>
	    <li> Yelt lets you write the whole script -- or use a simple builtin
	    <li> yelt lets you define and call functions
	    <li> statements can appear both before and after the main while loop
	    <li> while loops can be nested -- using looping constructs rather than
		 goto-labels
	</ul>
    <li> The ability to compute a file name and perform commands on every
	 line thereof.  Basically, an extension to the r-command in SED but
	 is labeled the F-command in Yelt.
</ul>

<p>
And like Star Trek, the Next Generation, it has different characters and
more sophisticated plots.

<p>
The rest of this page describes how to do many commonly needed tasks using yelt
scripts.