View source for Template:Lead/SplitNumber

<noinclude>The first parameter of the Lead template may be a combination of different things and needs to be split into two columns (0 and 1). Cases:
* Simple number: Return input + empty string
* Number plus number in parentheses, e.g. "12 (2)": Return 12 + (2), where 2 is formatted as a link (the backlink; this href of this must be without ()!)
* Number plus certain characters (used to distinguish multiple leads in a couplet, like "2, 2*, 2**"): Return 2 + *, etc.
* Number plus hyphen, like "2, 2-): Returns NOTHING + -, i.e. here the number is suppressed!
* Number plus certain letter (for couplets with MANY leads), like "2 a, 2 b, 2 c"): Return 2 + a, etc.
*: Note: in this case, a blank must be present between the number and the letter. "1b" will not work at present!

The subprocedure has three parameters: First parameter is the string to be split, second parameter 0 to return first, 1 to return second element. The third parameter "noformatting=1" suppresses actions like swap the 2nd and 1st part, (like "2-" returning "-" + ""). It currently works only in combination with the 2nd parameter set to "0"  and enforces to always return the lead number.

'''NOTE: This has a major problem with *; presently only the case of one * is fixed, 2** will appear still broken. Hoping for bugfix in mediawiki.'''

==USAGE examples==

123: actual = "{{Lead/SplitNumber | 123 | 0}} + {{Lead/SplitNumber | 123 | 1}}"; expected = "123 +"

123 (2): actual = "{{Lead/SplitNumber | 123 (2) | 0}} + {{Lead/SplitNumber | 123 (2) | 1}}"; expected = "123 + (2)" (where "(2)" is a link)

123*: actual = "{{Lead/SplitNumber | 123* | 0}} + {{Lead/SplitNumber | 123* | 1}}"; expected = "123 + *"

123**: actual = "{{Lead/SplitNumber | 123** | 0}} + {{Lead/SplitNumber | 123** | 1}}"; expected = "123 + **"

123-: actual = "{{Lead/SplitNumber | 123- | 0}} + {{Lead/SplitNumber | 123- | 1}}"; expected = "&ndash; + (EMPTY)"

123': actual = "{{Lead/SplitNumber | 123' | 0}} + {{Lead/SplitNumber | 123' | 1}}"; expected = "123 + ’ "

123’’: actual = "{{Lead/SplitNumber | 123’’ | 0}} + {{Lead/SplitNumber | 123’’ | 1}}"; expected = "123 + ’’ "

123 a: actual = "{{Lead/SplitNumber | 123 a | 0}} + {{Lead/SplitNumber | 123 a | 1}}"; expected = "123 + a "

123a: actual = "{{Lead/SplitNumber | 123a | 0}} + {{Lead/SplitNumber | 123a | 1}}"; expected = "123a + (EMPTY)" -- '''It is known that this does not work without a blank!'''

[[Category:Single-access key templates]]
</noinclude>{{Trim
|{{If-Instring | searchterm =(| string ={{{1}}}<!-- 1st priority: lead with backlink in "()":
-->|then ={{#ifeq:{{{2}}}|0|<!-- 
      Return 1st part:--> {{#sub:{{{1}}} | 0 |{{#pos:{{{1}}}|(}}<!--end sub:-->}} |<!-- 
      Else return 2nd part (as LINK!):
        First link target: (replace is used to delete closing parentheses) 
        -->[[#L{{#var:decisiontreeID}}_{{Trim|{{#replace: {{#sub:{{{1}}} |{{#expr: 1+{{#pos:{{{1}}}|(}} }}<!--end sub/repl/trim:-->}} |)|}} }}<!--
        Then displaytext with ():
        -->|&nbsp;({{Trim|{{#replace: {{#sub:{{{1}}} |{{#expr: 1+{{#pos:{{{1}}}|(}} }}<!--end sub/repl/trim:-->}} |)|}} }})]]<!--end ifeq:-->}}<!--
-->|else ={{If-Instring | searchterm =*| string = {{{1}}}<!-- 2nd priority: lead with "*":
  -->|then ={{#ifeq:{{{2}}}|0|<!-- 
      Return 1st part:
       -->{{#sub:{{{1}}} | 0 |{{#pos:{{{1}}}|*}}<!--end sub:-->}} |<!-- 
      Else return 2nd part:
        Note: Simple "{{#sub:{{{1}}} |{{#pos:{{{1}}}|*}} }}" does not work, the * returned by sub is always rendered as bullet.
        Many other attempts (nowiki, Asterisk in template, protect-replacing with §, then replacing back) do not work either.
        html entity seems to work though:
        -->{{#sub:{{#replace:{{{1}}}|*|&#42;}}|{{#pos:{{{1}}}|*}} }}<!--
      End ifeq:-->}}<!--
  -->|else ={{If-Instring | searchterm =-| string = {{{1}}}<!-- 3rd priority: lead with hyphen: "-" // PERHAPS later also search n-dash: – ?
  -->|then ={{#ifeq:{{{2}}}|0|<!-- 
      Return 1st part, actual return depends on the parameter "noformatting=1":
      -->{{#ifeq:{{{noformatting|}}}|1<!--
           Then-->|<!-- Return lead number unconditional:
           -->{{#sub:{{{1}}} | 0 |{{#pos:{{{1}}}|-}}<!--end sub:-->}}<!--
           Else-->|<!-- SPECIAL HANDLING: lead number IS SUPPRESSED and the hyphen/dash swapped in. 
             Note: Tried to replace hyphen with n-dash, plus the rest after it, but did not work:
              {{#replace: {{#sub:{{{1}}} |{{#pos:{{{1}}}|-}} |-|&ndash;}} }}
             So very simple instead, not allowing anything past the hyphen:
           -->&ndash;<!--
           End if noformatting:-->}}<!--
        End ifeq (for hyphen there is no result for 2nd column i.e. "{{{2}}}=1") )-->}}<!--
  -->|else ={{If-Instring | searchterm =’| string = {{#replace: {{{1}}} |'|’}}<!-- 4th priority: lead with "'" (always changed to formatted apostrophe):
  -->|then ={{#ifeq:{{{2}}}|0|<!-- 
      Return 1st part:
       -->{{#sub:{{{1}}} | 0 |{{#pos:{{#replace: {{{1}}} |'|’}}|’}}<!--end sub:-->}} |<!-- 
      Else return 2nd part:
       -->{{#sub:{{#replace: {{{1}}} |'|’}} |{{#pos:{{#replace: {{{1}}} |'|’}}|’}}<!--end sub:-->}}<!--
      End ifeq:-->}}<!--
  -->|else =<!-- none of the instring-tests succeeded, try to split by blank for all others, including letters-->{{#explode:{{{1}}}|<nowiki> </nowiki>|{{{2}}} }}<!--
end of 4 x If-Instring plus 1 Trim -->}} }} }} }} }}