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`replace_last`       | [DSF] Replace the last occurrance of a string with another string
`return`             | Returns the item from the inner most block, macro, or file. Similar to the `return` directive.
`search(s)`          | Tests if the given pattern is in the string.
`sin`                | Returns the sine of the item.
`size`               | Always returns 1 for text variables.
`smart`              | [DSF] Replace dashes with mdashes and ndashes
`split(s, n)`        | Splits the item on regular expression `s` and returns an array with the chunks. If `n` is passed, processing stops after the first `n` chunks.
`sprintf(p, q, ...)` | Uses the pattern stored in self, and passes it to sprintf with the passed arguments. Opposite from the fmt vmethod.
`sqrt`               | Returns the square root of the number.
`srand`              | Calls the perl srand function to set the internal random seed. This will affect future calls to the rand vmethod.
`stderr`             | Print the item to the current STDERR handle.
`substr(i, n)`       | Returns a substring of item starting at `i` and going to the end of the string. If `n` is passed, the substring stops after `n` characters.
`trim`               | Strips leading and trailing whitespace.
`uc`                 | Same as the upper command. Returns uppercased string.
`ucfirst`            | Uppercase the leading letter.
`upper`              | Return the string uppercased.
`uri`                | Perform a very basic URI encoding.
`url`                | Perform a URI encoding - but some characters such as `:` and `/` are left intact.
`xml_escape`         | [DSF] Escape strings that may contain XML so the string can be included in XML files such as ATOM or RSS feeds
`xml`                | Performs a very basic xml encoding (swaps out `&`, `<`, `>`, `'` and `"` with the corresponding xml entities).