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Update template language documentation

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Charles Haley 2011-07-02 11:20:01 +01:00
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src/calibre/manual/template_lang.rst
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@ -257,6 +257,7 @@ The following functions are available in addition to those described in single-f
iso : the date with time and timezone. Must be the only format present.
* ``eval(string)`` -- evaluates the string as a program, passing the local variables (those ``assign`` ed to). This permits using the template processor to construct complex results from local variables.
* ``has_cover()`` -- return ``Yes`` if the book has a cover, otherwise return the empty string
* ``not(value)`` -- returns the string "1" if the value is empty, otherwise returns the empty string. This function works well with test or first_non_empty. You can have as many values as you want.
* ``merge_lists(list1, list2, separator)`` -- return a list made by merging the items in list1 and list2, removing duplicate items using a case-insensitive compare. If items differ in case, the one in list1 is used. The items in list1 and list2 are separated by separator, as are the items in the returned list.
* ``multiply(x, y)`` -- returns x * y. Throws an exception if either x or y are not numbers.