Difference between revisions of "Template:Smart lookup"

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(Created page with "{{#vardefine:page|{{{1|Quick links lingo}}}}}{{#vardefine:index|{{{1|1}}}}}{{Add|index|1}}{{#if:{{{{#var:page}}|{{#var:index}}}} |{{{{#var:page}}|{{#var:index}}}} |{{#vardefin...")
 
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{{#vardefine:page|{{{1|Quick links lingo}}}}}{{#vardefine:index|{{{1|1}}}}}{{Add|index|1}}{{#if:{{{{#var:page}}|{{#var:index}}}}
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<includeonly>{{List lookup helper|{{{1}}}}}{{#vardefine:index|{{{2|1}}}}}<!--
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|{{{{#var:page}}|{{#var:index}}}}
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-->{{#ifexpr:{{#var:index}}<={{#var:length}}<!--
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|{{#vardefine:minindex|{{#var:index}}}}{{#vardefine:maxindex|1}}<!--
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if index is less than length of list, return immediately
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just for fun, binary search for last list entry if out of bounds
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-->|{{#var:entry_{{#var:index}}}}
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-->{{#dowhile:
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|{{#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}}}}
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|{{#ifexpr:{{#var:maxindex}}+1<{{#var:minindex}}|continue}}
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}}</includeonly><noinclude>{{Template doc|
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|{{#if:{{{{#var:page}}|{{#var:index}}}}
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Given a list and an index ''i'', return the (''i'' mod ''N'')-th entry in the list.
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<!--undershoot-->|{{#ifexpr:{{#var:index}}>{{#var:maxindex}}|{{#vardefine:maxindex|{{#var:index}}}}}}
 
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<!-- overshoot-->|{{#ifexpr:{{#var:index}}<{{#var:minindex}}|{{#vardefine:minindex|{{#var:index}}}}}}
 
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}}
 
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{{#vardefine:index|{{#expr:floor(({{#var:maxindex}}+{{#var:minindex}})/2)}}}}
 
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}}{{#vardefine:adjusted_index|{{#expr:({{{1|1}}} mod {{#var:index}})}}}}{{#ifexpr:{{#var:adjusted_index}}=0|{{#vardefine:adjusted_index|{{#var:index}}}}}}{{{{#var:page}}|{{#var:adjusted_index}}}}
 
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}}<noinclude>
 
  
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1 - page with list
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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]].
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<pre>
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{{Smart lookup|QBWiki:Quick links/lingo|1}}
  
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2 - index
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{{Smart lookup|QBWiki:Quick links/lingo|99}}
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</pre>
  
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When index i <= # of entries in list, return vlalue straight away. If i > #, it'll wrap around (mod #).
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{{Smart lookup|QBWiki:Quick links/lingo|1}}
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</noinclude>
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{{Smart lookup|QBWiki:Quick links/lingo|99}}
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}}</noinclude>

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"?

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