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End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

ARGF#internal_encoding

ARGF.internal_encoding → encoding

Returns the internal encoding for strings read from ARGF as an Encoding object.

If ARGF.set_encoding has been called with two encoding names, the second is returned. Otherwise, if Encoding.default_external has been set, that value is returned. Failing that, if a default external encoding was specified on the command-line, that value is used. If the encoding is unknown, nil is returned.

See also #inspect #lineno #inplace_mode= #lineno= also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1