Difference between revisions of "Template:Smart lookup"

Latest revision as of 21:00, 14 December 2025

Template documentation

Given a list and an index i, return the (i mod N)-th entry in the list.

This behavior was originally extracted from Quick links smart lingo and was refactored to use List lookup helper.

{{Smart lookup|QBWiki:Quick links/lingo|1}}

{{Smart lookup|QBWiki:Quick links/lingo|99}}

Wondering why people keep saying "m"?

Heard something about the "canon"?

@@ Line 1: / Line 1: @@
-<includeonly>{{#vardefine:page|{{{1}}}}}{{#vardefine:index|{{{2|1}}}}}{{Add|index|1}}{{#if:{{{{#var:page}}|{{#var:index}}}}<!--
+<includeonly>{{List lookup helper|{{{1}}}}}{{#vardefine:index|{{{2|1}}}}}<!--
-if the page at index exists, return immediately and be done with it
+-->{{#ifexpr:{{#var:index}}<={{#var:length}}<!--
--->|{{{{#var:page}}|{{#var:index}}}}
+if index is less than length of list, return immediately
-|{{#vardefine:minindex|{{#var:index}}}}{{#vardefine:maxindex|1}}<!--
+-->|{{#var:entry_{{#var:index}}}}
-otherwise it is out of bounds and we need to wrap around - since we need the total size, do a binary search for last list entry for fun
+|{{#vardefine:adjusted_index|{{#expr:({{#var:index}} mod {{#var:length}})+1}}}}{{#ifexpr:{{#var:adjusted_index}}=0|{{#vardefine:adjusted_index|{{#var:index}}}}}}{{#var:entry_{{#var:adjusted_index}}}}
--->{{#dowhile:
-|{{#ifexpr:{{#var:maxindex}}+1<{{#var:minindex}}|continue}}
-|{{#if:{{{{#var:page}}|{{#var:index}}}}
-<!--undershoot-->|{{#ifexpr:{{#var:index}}>{{#var:maxindex}}|{{#vardefine:maxindex|{{#var:index}}}}}}
-<!-- overshoot-->|{{#ifexpr:{{#var:index}}<{{#var:minindex}}|{{#vardefine:minindex|{{#var:index}}}}}}
-}}
-{{#vardefine:index|{{#expr:floor(({{#var:maxindex}}+{{#var:minindex}})/2)}}}}
-}}{{#vardefine:adjusted_index|{{#expr:({{{2|1}}} mod {{#var:index}})}}}}{{#ifexpr:{{#var:adjusted_index}}=0|{{#vardefine:adjusted_index|{{#var:index}}}}}}{{{{#var:page}}|{{#var:adjusted_index}}}}
 }}</includeonly><noinclude>{{Template doc|
 Given a list and an index ''i'', return the (''i'' mod ''N'')-th entry in the list.
-This behavior was extracted from [[Template:Quick links smart lingo]].
+This behavior was originally extracted from [[Template:Quick links smart lingo|Quick links smart lingo]] and was refactored to use [[Template:List lookup helper|List lookup helper]].
 <pre>
-{{Smart lookup
+{{Smart lookup|QBWiki:Quick links/lingo|1}}
-|Quick links lingo <!-- page containing list -->
-|1                 <!-- index -->
+{{Smart lookup|QBWiki:Quick links/lingo|99}}
-}}
 </pre>
-{{Smart lookup|Quick links lingo|1}}
+{{Smart lookup|QBWiki:Quick links/lingo|1}}
+{{Smart lookup|QBWiki:Quick links/lingo|99}}
 }}</noinclude>

Difference between revisions of "Template:Smart lookup"

Latest revision as of 21:00, 14 December 2025

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