access access append append_bintable append_bintable append_bintable_header append_image append_image_header append_null_bintable append_null_image appendBintable appendBintableHeader appendImage appendImageHeader appendNullBintable appendNullImage close filter find hdu_count hduCount MefFile operator[] primary read_hdu_names read_hdu_names_versions readHduNames readHduNamesVersions remove strategy strategy strategy ~MefFile

find() const T & find ( const std::string &  name, long  version = 0  ) Access the first HDU with given name, type and version. Template Parameters T The type of HDU or header or data unit handler Parameters name The HDU name version The HDU version, or 0 to not check the version The template parameter is used to disambiguate when two extensions of different types have the same name. For example, in a file with an image extension and a binary table extension both named "EXT", find<ImageHdu>("EXT") or find<ImageRaster>() return the image extension, while find<BintableHdu>("EXT") returns the binary table extension, and find<Hdu>("EXT") returns whichever of the two has the smallest index. In the case where several HDUs have the same type, name and version (which is discouraged by the standard, but not forbidden), method read_hdu_names() should be used to get the indices and then access(long) should be called. See also access(long) access(const std::string&)