Difference between revisions of "Template:Val/delimitnum"

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blackwiki>Jimp
(delimiting using gaps either side of the decimal point per MOSNUM, see Template_talk:Val#Delimiting)
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<includeonly><!--
 
<includeonly><!--
-->{{#ifexpr:({{{1|0}}}1)=({{{1|0}}})|<!-- Test loss of precision by appending a fixed digit "1"
+
-->{{#ifeq: <!-- compare "04" to 4, and if so, output 4-digits pure
   -->{{FormattingError|Too Many Digits|nocategory={{{nocategory|}}}}}<!--
+
   What might be "04" is composed of three outputs: dot, len, and fmt -->
-->|<!-- No loss of precision, can display this number
+
  {{#invoke:String|find|{{{1}}}|.}}<!-- Output the zero if no dot.
  -->{{#ifexpr:{{{1|0}}}<0|&minus;}}<!-- Output the mathematical minus sign (not the minus-hyphen) if negative
+
  -->{{#invoke:String|len <!-- Length of 4 with sign and spaces filtered? -->
  -->{{#ifexpr:abs({{{1|0}}}1)>10*abs({{{1|0}}})|<!-- Number is an integer (no dot): appending a non-zero digit multiplies it by more than 10
+
    |{{#invoke:String|replace|{{{1}}}|[-+ ]|plain=false}}}}<!--  
    -->{{val/delimitnum/whole|{{#expr:abs({{{1|0}}})}}}}<!-- Format the integer part using (a) thin space(s) for grouping digits
+
    That replace just filtered out any and all spaces, + or - characters.
   -->|<!-- Number is not an integer (at least contains a dot)
+
    But it's gotta have the minus sign first in the [-charclass].
    -->{{val/delimitnum/whole|{{#expr:trunc(abs({{{1|0}}}))}}}}.<!-- Format the integer part using (a) thin space(s) for grouping digits, followed by the locale's separator before fractional decimals (a decimal point on en-WP)
+
    Any fmt given?  If so comparison to "4" will fail -->{{{fmt|}}}
    -->{{val/delimitnum/fraction<!--
+
| 4 |{{#invoke:String|replace|{{{1}}}|-|&minus;}}<!--  
      -->|{{#expr:abs({{{1|0}}}1)-trunc(abs({{{1|0}}}1))}}<!-- The fractional part (appended with an extra digit 1 to avoid roundoff error on last displayed digit)
+
If fmt is nil, found . is 0, and filtered len is 4, then 04=4,
      -->|{{#expr:(-ln(abs({{{1|0}}}1)-abs({{{1|0}}}))/ln10round 0)-1}}<!-- The number of decimals to display (the difference of absolute values is the value of the appended digit 1, its log10 gives its position)
+
and we have just output the number, replacing any - with a minus sign
       -->|nocategory={{{nocategory|}}}<!-- category if formatting error (too many digits)
+
 
    -->}}<!--
+
Else:
  -->}}<!--
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-->|{{#switch: <!-- its not a pure 4-digit number with no fmt options given-->
-->}}</includeonly><noinclude>{{documentation}}</noinclude>
+
{{#invoke:String|sub|{{{1|0}}}|1|1}}
 +
  <!-- If the first char is ... -->
 +
 
 +
   |- <!-- ... one kind of dash, or another -->
 +
  |− = {{#ifeq:{{{nosign|off}}}|off|−}}<!-- output a &minus; sign unless nosign
 +
    -->{{#ifeq:
 +
          {{#invoke:String|sub|{{{1|0}}}|2|2}}|.|0}}<!--And then
 +
          then if next char is . then output a zero, else do || nothing.
 +
    -->{{#switch: {{{fmt}}} <!-- Format the rest of the number. -->
 +
      |commas={{formatnum:{{#invoke:String|sub|{{{1|0}}}|2}}}}
 +
      |#default = {{#invoke:Gapnum|main|{{#invoke:String|sub|{{{1|0}}}|2}}}}
 +
  }}  
 +
 
 +
  <!-- follow same logic for leading + char -->
 +
  |+={{#ifeq:{{{nosign|off}}}|off|+}}<!--
 +
    -->{{#ifeq:{{#invoke:String|sub|{{{1|0}}}|2|2}}|.|0}}<!--
 +
       -->{{#switch:{{{fmt}}}
 +
        |commas = {{formatnum:{{#invoke:String|sub|{{{1|0}}}|2}}}}
 +
        |#default = {{#invoke:Gapnum|main|{{#invoke:String|sub|{{{1|0}}}|2}}}}
 +
    }} <!-- follow similar logic for leading . char -->
 +
  |.=0<!--
 +
    -->{{#switch:{{{fmt}}}
 +
      |commas={{{1|0}}}
 +
      |#default = {{#invoke:Gapnum|main|{{{1|0}}}}}
 +
    }}
 +
 
 +
  <!-- Else if first char is not . or - or + -->
 +
  |#default = {{#switch:{{{fmt}}}
 +
    |commas={{formatnum:{{{1|0}}}}}
 +
    |#default = {{#invoke:Gapnum|main|{{{1|0}}}}}
 +
      }}
 +
  }}
 +
}}</includeonly><noinclude>{{documentation}}</noinclude>

Latest revision as of 09:37, 30 September 2020

50px Template documentation[create]