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instance method

StringIO#external_encoding

() -> ::Encoding

external_encoding → encoding or nil

ext/stringio/stringio.c View on GitHub ↗

static VALUE
strio_external_encoding(VALUE self)
{
    struct StringIO *ptr = StringIOForRead(self);
    return rb_enc_from_encoding(get_enc(ptr));
}

Returns an Encoding object that represents the encoding of the string; see Encodings:

Example

strio = StringIO.new('foo')
strio.external_encoding # => #<Encoding:UTF-8>

Returns nil if self has no string and is in write mode:

Example

strio = StringIO.new(nil, 'w+')
strio.external_encoding # => nil

See also #eof? #fcntl #eof #fileno also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0