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Buaidh: /* Use */

2010-01-19T14:51:39Z

‎Use

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==Use==
This template prefixes text with an invisible [[sort key]] based upon a [[real number]] for use in [[Help:Sorting|sortable tables]] with mixed numbers and text or just text. This template maintains a valid sort order with an accuracy of one part in 10,000,000,000 in the ranges 1e-300 to 1e300 and -1e-300 to -1e300.

The syntax of this template is:
<nowiki>{{nk|var1|var2}}</nowiki>
where:
*var1 = any real number (may contain [[thousands separator]]s), ∞, 1/∞, -1/∞, -∞, INF, 1/INF, -1/INF, -INF, IND, indeterminate, UND, undefined, UNK, unknown, NA, not applicable, or not available.
*var2 = optional text to display (''default'' = var1)
**NOTE: If var2 is $, £, €, #, or No., var2 is prefixed to var1

The use of this template is illustrated in the sortable table below:
{|class="wikitable sortable"
!class=unsortable|[[Wikitext]]
!class=unsortable|[[Help:Sorting#Sorting with a hidden key|Invisible sort key prefix]]
!sort without key
!sort with key
|-
|<nowiki>{{nk|0|zero}}</nowiki>
|<nowiki>!F </nowiki>
|align=center|zero
|align=center|{{nk|0|zero}}
|-
|<nowiki>{{nk|1|one}}</nowiki>
|<nowiki>!C </nowiki>
|align=center|one
|align=center|{{nk|1|one}}
|-
|<nowiki>{{nk|+2}}</nowiki>
|<nowiki>!B9993068528194 </nowiki>
|align=center|+2
|align=center|{{nk|+2}}
|-
|<nowiki>{{nk|-3}}</nowiki>
|<nowiki>!J0010986122886 </nowiki>
|align=center|-3
|align=center|{{nk|-3}}
|-
|<nowiki>{{nk|-4.01267}}</nowiki>
|<nowiki>!J0013894568551 </nowiki>
|align=center|-4.01267
|align=center|{{nk|-4.01267}}
|-
|<nowiki>{{nk|5.125}}&nbsp;amperes</nowiki>
|<nowiki>!B9983658694749 </nowiki>
|align=center|5.125 amperes
|align=center|{{nk|5.125}} amperes
|-
|<nowiki>{{nk|{{#expr:2*pi}}|2&pi;}}</nowiki>
|<nowiki>!B9981621229335 </nowiki>
|align=center|2π
|align=center|{{nk|{{#expr:2*pi}}|2π}}
|-
|<nowiki>{{nk|7|VII}}</nowiki>
|<nowiki>!B9980540898509 </nowiki>
|align=center|VII
|align=center|{{nk|7|VII}}
|-
|<nowiki>{{nk|8.27|£}}</nowiki>
|<nowiki>!B9978873654909 </nowiki>
|align=center|£8.27
|align=center|{{nk|8.27|£}}
|-
|<nowiki>{{nk|-9.000}}</nowiki>
|<nowiki>!J0021972245773 </nowiki>
|align=center|-9.000
|align=center|{{nk|-9.000}}
|-
|<nowiki>{{nk|10}} apples</nowiki>
|<nowiki>!B9976974149070 </nowiki>
|align=center|10 apples
|align=center|{{nk|10}} apples
|-
|<nowiki>{{nk|1776|MDCCLXXVI}}</nowiki>
|<nowiki>!B9925178810764 </nowiki>
|align=center|MDCCLXXVI
|align=center|{{nk|1776|MDCCLXXVI}}
|-
|<nowiki>{{nk|10,000,000,000}}</nowiki>
|<nowiki>!B9769741490700 </nowiki>
|align=center|10,000,000,000
|align=center|{{nk|10,000,000,000}}
|-
|<nowiki>{{nk|10,000,000,001}}</nowiki>
|<nowiki>!B9769741490699 </nowiki>
|align=center|10,000,000,001
|align=center|{{nk|10,000,000,001}}
|-
|<nowiki>{{nk|12,046,360,889,000|$}}</nowiki>
|<nowiki>!B9698802162706 </nowiki>
|align=center|$12,046,360,889,000
|align=center|{{nk|12,046,360,889,000|$}}
|-
|<nowiki>{{nk|1e100|googol}}</nowiki>
|<nowiki>!B7697414907005 </nowiki>
|align=center|googol
|align=center|{{nk|1e100|googol}}
|-
|<nowiki>{{nk|-1|minus one}}</nowiki>
|<nowiki>!I </nowiki>
|align=center|minus one
|align=center|{{nk|-1|minus one}}
|-
|<nowiki>{{nk|0.25|$}}</nowiki>
|<nowiki>!D0013862943611 </nowiki>
|align=center|$0.25
|align=center|{{nk|0.25|$}}
|-
|<nowiki>{{nk|-0.035}}</nowiki>
|<nowiki>!H9966475927825 </nowiki>
|align=center|-0.035
|align=center|{{nk|-0.035}}
|-
|<nowiki>{{nk|-1.4525e-9}}&nbsp;m</nowiki>
|<nowiki>!H9796500203727 </nowiki>
|align=center|-1.4525e-9 m
|align=center|{{nk|-1.4525e-9}} m
|-
|<nowiki>{{nk|1e-300|googol-3}}</nowiki>
|<nowiki>!D6907755278982 </nowiki>
|align=center|googol-3
|align=center|{{nk|1e-300|googol-3}}
|-
|<nowiki>{{nk|-1e300|-googol3}}</nowiki>
|<nowiki>!J6907755278982 </nowiki>
|align=center|-googol3
|align=center|{{nk|-1e300|-googol3}}
|-
|<nowiki>{{nk|1e-301}}</nowiki>
|<nowiki>!E </nowiki>
|align=center|1e-301
|align=center|{{nk|1e-301}}
|-
|<nowiki>{{nk|-1e302}}</nowiki>
|<nowiki>!K </nowiki>
|align=center|-1e302
|align=center|{{nk|-1e302}}
|-
|<nowiki>{{nk|-1e-303}}</nowiki>
|<nowiki>!G </nowiki>
|align=center|-1e-303
|align=center|{{nk|-1e-303}}
|-
|<nowiki>{{nk|INF|1/0}}</nowiki>
|<nowiki>!A </nowiki>
|align=center|1/0
|align=center|{{nk|INF|1/0}}
|-
|<nowiki>{{nk|IND|0/0}}</nowiki>
|<nowiki>!L </nowiki>
|align=center|0/0
|align=center|{{nk|IND|0/0}}
|-
|<nowiki>{{nk|UND|∞ - ∞}}</nowiki>
|<nowiki>!M </nowiki>
|align=center|∞ - ∞
|align=center|{{nk|UND|∞ - ∞}}
|-
|<nowiki>{{nk|UNK|x}}</nowiki>
|<nowiki>!N </nowiki>
|align=center|x
|align=center|{{nk|UNK|x}}
|-
|<nowiki>{{nk|NA}}</nowiki>
|<nowiki>!O </nowiki>
|align=center|NA
|align=center|{{nk|NA}}
|-
|<nowiki>{{nk|not a number|AAA}}</nowiki>
|
|align=center|AAA
|align=center|{{nk|not a number|AAA}}
|-
|<nowiki>{{nk||ZZZ}}</nowiki>
|
|align=center|ZZZ
|align=center|{{nk||ZZZ}}
|-
|}

===See also===
This template invokes [[Template:Numkey2]] to create the invisible sort key prefix.
<includeonly>
[[Category:Sorting templates|{{PAGENAME}}]]
</includeonly>

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