Template:Chop head and tail

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Usage

{{Chop head and tail|<string>|<number>}}

This template removes <number> characters from the start and end of <string>.

{{Chop head and tail|12345654321|3}} gives 45654.


Unlinking

This template can be used to "unlink" a linked parameter.

{{Chop head and tail|[[Einstein]]|2}} results in Einstein.

Because the default value of <number> is 2, this can be shortened to {{Chop head and tail|[[Einstein]]}}.


Limitations

  • Expensive.
  • When used on strings with characters that carry a meaning in wiki-layout, this template will interpret the character as a layout instruction (bugzilla:12974). For example, {{Chop head and tail|[[123;456]]}} renders as
    123;456
  • Supports the character set as defined by {{Str index/getchar}}, so that e.g. {{Chop head and tail|[[Nürnberg]]}} renders correctly as Nürnberg. However, not all characters are in this set.

See also

String handling templates
As of February 2013, these templates are being optimised using Lua modules.
Trim by counting
  • {{Str mid}} – To return a substring, specified by its position and length.
  • {{Trunc}} – To trim down to a specified number of characters.
  • {{Str left}} – To trim down to a specified number of characters, or duplicate the string to a specified number.
  • {{Str crop}} – To crop a specified number of characters off the end.
  • {{Chop head and tail}} – To crop a specified number of characters off the beginning and end.
  • {{Str right}} – To trim the first specified number of characters.
  • {{Str rightc}} – To return a number of characters from the end, returns a parameter if the string is empty.
  • {{Str rightmost}} – To trim down to the last specified number of characters.
  • {{Str sub old}} – To trim down to a specified number, starting at a given number from the left.
  • {{Str sub new}} – Select a substr based on starting and ending index.
  • {{Str index}} – Returns a given character from a string, but not accented letters.
Trim by checking
Insert strings
  • {{Loop}} – Repeat character string n times
  • {{Replace}} – Returns the string, after replacing all occurrences of a specified string with another string.
  • {{Strloc insert}} – Inserts a string at character location strloc, or appends if strloc<=0.
  • {{Strloc prefix}} – Extracts string prefix up to location strloc, or whole string if strloc<=0.
  • {{Str rep}} – Returns the string, after replacing the first occurrence of a specified string with another string.
Length
  • {{Str len}} – Returns a string's length.
  • {{iflenge}} – IF LENgth Greater than or Equal to.
  • {{Str ≥ len}} – To check if a string is "longer or equally long" or "shorter" than a given length.
  • {{Str ≤ len}} – To check if a string is "shorter or equally long" or "longer" than a given length.
  • {{Str ≠ len}} – To check if a string is "not equal" or "equal" to a given length.
  • {{Str ≤ ≥ len}} – To check if a string is "shorter", "equal", or "longer" than a given length.
Analyse string
  • {{Str endswith}} – To check if a string ends with a given string.
  • {{Str find}} – Returns the numerical location of a given string in a string.
  • {{Strfind short}} – Returns the numerical location of a given string in a string.
  • {{Str find0}} – Zero-based substring search.
  • {{Str sub find}} – Searches a substring in a string at the given offset.
  • {{ASCII code}} – Returns the ASCII value of a single character.
  • {{Str letter}} – Returns the number of letters that begin a string.
  • {{Str number}} – Returns the number of numbers that begin a string.
  • {{Str gtr str}} – Compares two strings for alphabetical order, and returns a value accordingly.
  • {{a or an}} – Takes a noun and produces the appropriate indefinite article, based on whether the first letter is a vowel.
Trim, dedicated
  • {{WikiProjectbasename}} - Removes "WikiProject" from a pagename
  • {{Remove unranked}} - Removes the string "unranked_" from the left of a string (taxonomy).
  • {{Ship prefix}} – Returns the length of a ship name prefix, if listed (ship names).
  • {{Title without disambig}} – To trim off any parenthesis text at the end of a string (disambiguation).
  • {{Title disambig text}} – Returns text in parenthesis at the end of a string (disambiguation).
  • {{Unlink}} – Removes wikilink brackets (wikicode).
  • {{Remove file prefix}}—Removes "File:" or "Image:" from filenames.
Technical developments


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