Ahenket: Nieuwe pagina aangemaakt met '{{Documentation subpage}} ==Purpose== Determines whether something i...'

2013-07-18T08:51:20Z

Nieuwe pagina aangemaakt met '<noinclude>{{Documentation subpage}}</noinclude>  ==Purpose== Determines whether something i...'

Nieuwe pagina

<noinclude>{{Documentation subpage}}</noinclude>

==Purpose==
Determines whether something is valid in a certain context. Currently only implemented for determining if a number is within the precision that Wikipedia expressions can handle.
==Returns==
'''true''' if the argument is valid, '''false''' if it is not.
==Examples==
:<code><nowiki>{{valid|number=A}}</nowiki></code> = {{valid|number=A}} ''(not a number)''
:<code><nowiki>{{valid|number=1234}}</nowiki></code> = {{valid|number=1234}}
:<code><nowiki>{{valid|number=+1234}}</nowiki></code> = {{valid|number=+1234}}
:<code><nowiki>{{valid|number=-1234}}</nowiki></code> = {{valid|number=-1234}}
:<code><nowiki>{{valid|number=(1234)}}</nowiki></code> = {{valid|number=(1234)}} ''(one pair of parenthesis is allowed)''
:<code><nowiki>{{valid|number=--1234}}</nowiki></code> = {{valid|number=--1234}} ''(incorrect sign use)''
:<code><nowiki>{{valid|number=1234567890}}</nowiki></code> = {{valid|number=1234567890}}
:<code><nowiki>{{valid|number=12345678901234567890}}</nowiki></code> = {{valid|number=12345678901234567890}} ''(too large)''
:<code><nowiki>{{valid|number=1.234567890}}</nowiki></code> = {{valid|number=1.234567890}}
:<code><nowiki>{{valid|number=1.2345678901234567890}}</nowiki></code> = {{valid|number=1.2345678901234567890}} ''(too many decimals)''

==Performance impact==
Template:Valid returns "true" for a valid, single number (2+2 gives "false"), and allows [[scientific notation]] (such as: -3.45E-07). The precision limit is determined live, for whichever server is formatting the page, typically allowing 14-digit precision (plus trailing zeroes), but it does not detect extreme precision problems dropping minor end-digits:
:* cannot reject: -10020030040050000000000000000.70, treated as -1.002003004005E+28
The template has been written with minimal markup text, and could be used 50,000-13,000 times per page, or less when all 30-digit numbers. Template:Valid is typically used at upper levels of other templates, so it is unlikely to trigger expansion-depth problems. However, it has an [[m:HELP:Expansion depth|expansion-depth]] of 8 levels, and returns "false" if used when nested too deep inside other templates, such as at level 33 when the expansion depth limit is 40.

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[[Category:Wikipedia formatting and function templates]]

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Sjabloon:Valid/doc - Bewerkingsoverzicht

Ahenket: Nieuwe pagina aangemaakt met '{{Documentation subpage}} ==Purpose== Determines whether something i...'