save. Saving file to disk

^some_file.save[format;filename]
^some_file.save[format;
filename;options]   [3.4.0]

Method saves object to file in specified format and with specified name.

format-format of saving file (text or binary)
filename-name of file and path for the file to be saved
options-hash, in which you can specify $.charset[charset] of saving text file

Note: if file with specified filename is exist, it will be overwrited.
Note: to append some text to a file, use ^string.save[append;].

Example
^archive.save[text;/arch/archive.txt]

This code will save object of class
file as archive.txt in text format to directory /arch/.


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