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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2014-09-18 20:03:23 +0000 |
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| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2014-09-18 20:03:23 +0000 |
| commit | f316a2ed52195135a35e32d7096e876357c48c69 (patch) | |
| tree | 5f4486b9a5a213a69e66ef574d6bc643a207981c /doc/multidefine.html | |
| download | execline-f316a2ed52195135a35e32d7096e876357c48c69.tar.xz | |
initial commit: rc for execline-2.0.0.0
Diffstat (limited to 'doc/multidefine.html')
| -rw-r--r-- | doc/multidefine.html | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/doc/multidefine.html b/doc/multidefine.html new file mode 100644 index 0000000..03f6b22 --- /dev/null +++ b/doc/multidefine.html @@ -0,0 +1,69 @@ +<html> + <head> + <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> + <meta http-equiv="Content-Language" content="en" /> + <title>execline: the multidefine command</title> + <meta name="Description" content="execline: the multidefine command" /> + <meta name="Keywords" content="execline command multidefine" /> + <!-- <link rel="stylesheet" type="text/css" href="http://skarnet.org/default.css" /> --> + </head> +<body> + +<p> +<a href="index.html">execline</a><br /> +<a href="http://skarnet.org/software/">Software</a><br /> +<a href="http://skarnet.org/">skarnet.org</a> +</p> + +<h1> The <tt>multidefine</tt> program </h1> + +<p> +<tt>multidefine</tt> splits a value and defines several variables at once, +then executes another program. +</p> + +<h2> Interface </h2> + +<p> + In an <a href="execlineb.html">execlineb</a> script: +</p> + +<pre> + multidefine [ -0 ] [ -r ] [ -C | -c ] [ -n ] [ -d <em>delim</em> ] <em>value</em> { <em>variables...</em> } <em>prog...</em> +</pre> + +<ul> + <li> <tt>multidefine</tt> reads a <a href="el_semicolon.html">block</a> +containing a list of variables. </li> + <li> <tt>multidefine</tt> <a href="el_transform.html">splits</a> +<em>value</em>, and performs other operations depending on the given +options. </li> + <li> <tt>multidefine</tt> performs +<a href="el_substitute.html">parallel substitution</a> on +<em>prog...</em>, using all of the <em>variables</em> in the block as keys. +The first word in the split <em>value</em> is assigned to the first +<em>variable</em>, the second word is assigned to the second <em>variable</em>, +and so on. Every <em>variable</em> is substituted with exactly one word. </li> + <li> If a <em>variable</em> is the empty word, then the word in the split +<em>value</em> corresponding to its position is not substituted. So you can +use empty words to pad the list of variables and only perform substition +on the relevant fields. </li> + <li> <tt>multidefine</tt> then execs into the modified <em>prog...</em>. </li> +</ul> + +<h2> Options </h2> + +<ul> + <li> <tt>-0</tt> : if there are more <em>variables</em> in the block than +there are words in the split <em>value</em>, the excess variables +will be replaced with zero word. Without this option, the excess variables are +replaced with the empty word. </li> + <li> <tt>-r</tt> : behave similarly to the "read" shell command. +If there are more words in the split <em>value</em> than there are +<em>variables</em> in the block, the last variable will be replaced with all +the remaining words (and will be split). Without this option, the last variable +is replaced with a single word, and the excess words are lost. </li> +</ul> + +</body> +</html> |