From English Wikipedia @ Freddythechick
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 | This template uses Lua:
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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.
Examples
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| {{loop|50|abcdefghij}} }} returns 500{{str len| {{loop|10000|abcdefghij}} }} returns 100000
Template data
Template parameters
| Parameter | Description | Type | Status |
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| Alpha-numeric text | 1 | The string to be counted
| String | required |
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Technical details
This is the first general-purpose template to be implemented using mw:Extension:Scribunto. The Lua code is located in Module:String.
See also
String-handling templates (help page) |
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Substring (select chunk of string by its position) |
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| {{str sub new}} | Select a substring based on starting and ending index counted in either direction. | | {{str left}} | Keep the first N characters of a string, or duplicate it to N characters. | | {{str crop}} | Return all but the last N characters of a string. | | {{str index}} | Return the N-th character of a string. |
| | {{str right}} | Return substring starting at N-th character to end of string. | | {{str rightc}} | Return the last N characters of a string; or a given value if empty. | | {{str sub old}} | Return substring of given length starting at N-th character. |
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Trimming (select/remove chunk of string by character type) |
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Select/remove specific item from string |
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| {{delink}}, {{trim brackets}} | Removes wikilink brackets (wikicode); all or outer only. | | {{Plain text}} | Removes wikicode (formatting and brackets) | | {{PAGENAMEBASE}} | Trim off any parenthesis text at the end of a string (disambiguation). | | {{title disambig text}} | Returns text in parentheses at the end of a string (disambiguation). |
| | {{title year}} | Returns the 3-or-4-digit year from a pagename, if any. | | {{title decade}} | Returns the 4-digit decade from a pagename (e.g. "1740" from "Foo 1740s bar"), if any. | | {{title number}} | Returns any number from a pagename. | | {{WikiProjectbasename}} | Removes "WikiProject" from a pagename. |
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Insertion, replacement and length |
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| {{loop}} | Repeat character string a specified number of times. | | {{replace}} | Returns the string, after replacing all occurrences of a specified string with another string. | | {{str rep}} | Returns the string, after replacing the first occurrence of a specified string with another string. | | {{digits}} | Returns the string, after removing all characters that are not digits 0–9 | | {{Nowiki}} | Displays wikitext as plain text. |
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| {{str len}} | Returns a string's length. | | {{str ≥ len}} | Check if a string is "longer or equally long" or "shorter" than a given length. | | {{str ≤ len}} | Check if a string is "shorter or equally long" or "longer" than a given length. | | {{str ≠ len}} | Check if a string is "not equal" or "equal" to a given length. |
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Analysis and searching |
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| {{Array}} | Array item manipulation and retrieval. | | {{a or an}} | Takes a noun and produces the appropriate indefinite article, based on whether the first letter is a vowel. | | {{in string}} | Returns optional string when given string is not found | | {{Isnumeric}} | Returns number when true, blank when not numeric. | | {{str letter}} | Returns the number of letters that begin a string. | | {{str number}} | Returns the number of numbers that begin a string. |
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Modules and built-in functions |
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