Brett Wuth: New page: == Pn == {{P1/Doc/Related}} The templates `{{((}}P''n''|param 1|param 2|param 3|...{{))}}`, where "`''n''`" is a number, each return the corresponding `param ''...`


Brett Wuth — Mon, 31 Dec 2012 19:44:10 GMT
New page: == Pn == {{P1/Doc/Related}} The templates  <code>{{((}}P''n''|param 1|param 2|param 3|...{{))}}</code>, where "<code>''n''</code>" is a number, each return the corresponding <code>param ''...
New page
== Pn ==

{{P1/Doc/Related}}

The templates 

<code>{{((}}P''n''|param 1|param 2|param 3|...{{))}}</code>,

where "<code>''n''</code>" is a number,

each return the corresponding <code>param ''n''</code>.



They are typically used in other templates when there are several values

that can be returned, one of which is the named parameter.  

Whether to use

<code>P''n''</code> is calculated.



E.g.



<pre>

{{ {{#if: {{{1|}}} | P1 | P2 }} |{{{1}}}|{{{2|}}}}}

</pre>



returns parameter 1 if it's non blank, otherwise parameter 2.



This usage might be chosen because the following more straight forward

implementation would have the undesired side effect of stripping

whitespace from the beginning and end of parameters 1 and 2 (a side

effect of #if:).



<pre>

{{#if: {{{1|}}} | {{{1}}} | {{{2|}}} }}

</pre>

Template:P1/Doc/PN - Revision history

Brett Wuth: New page: == Pn == {{P1/Doc/Related}} The templates {{((}}P''n''|param 1|param 2|param 3|...{{))}}, where "''n''" is a number, each return the corresponding param ''...

Brett Wuth: New page: == Pn == {{P1/Doc/Related}} The templates `{{((}}P''n''|param 1|param 2|param 3|...{{))}}`, where "`''n''`" is a number, each return the corresponding `param ''...`