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This template is used in system messages , and on approximately 19,000 pages . Changes to it can cause immediate changes to the Wikipedia user interface. To avoid major disruption, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage . The tested changes can be added to this page in a single edit. Please discuss changes on the talk page before implementing them.
This template uses Lua :
This is the {{ str len }} meta-template.
It takes a string as parameter and returns its length (excluding spaces at the start and end). It can now count as high as necessary.
If the parameter is empty or undefined it is considered to be of zero length:
{{str len}}
returns 0
{{str len|}}
returns 0
{{str len| }}
returns 0
It counts the length correctly, even if the string contains spaces, looks like a number, or contains special characters:
{{str len| ab cde }}
returns 6
{{str len| 1234567 }}
returns 7
{{str len| café åäö }}
returns 8
{{str len| 499-characters... }}
returns 499
{{str len| 1000-characters... }}
returns 1000
This is the first general-purpose template to be implemented using mw:Extension:Scribunto . The Lua code is located in Module:String .
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.
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