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manual/template_lang.rst
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@ -309,7 +309,7 @@ The following functions are available in addition to those described in single-f
* ``formats_paths()`` -- return a comma-separated list of colon-separated items representing full path to the formats of a book. You can use the select function to get the path for a specific format. Note that format names are always uppercase, as in EPUB.
* ``formats_sizes()`` -- return a comma-separated list of colon-separated items representing sizes in bytes of the formats of a book. You can use the select function to get the size for a specific format. Note that format names are always uppercase, as in EPUB.
* ``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.
* ``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.
* ``list_difference(list1, list2, separator)`` -- return a list made by removing from `list1` any item found in `list2`, using a case-insensitive compare. The items in `list1` and `list2` are separated by separator, as are the items in the returned list.
* ``list_equals(list1, sep1, list2, sep2, yes_val, no_val)`` -- return `yes_val` if `list1` and `list2` contain the same items, otherwise return `no_val`. The items are determined by splitting each list using the appropriate separator character (`sep1` or `sep2`). The order of items in the lists is not relevant. The compare is case insensitive.
* ``list_intersection(list1, list2, separator)`` -- return a list made by removing from `list1` any item not found in `list2`, using a case-insensitive compare. The items in `list1` and `list2` are separated by separator, as are the items in the returned list.