End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
ARGF#readlines
ARGF.readlines(sep = $/) → array
ARGF.readlines(limit) → array
ARGF.readlines(sep, limit) → array
io.c
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static VALUE
argf_readlines(int argc, VALUE *argv, VALUE argf)
{
long lineno = ARGF.lineno;
VALUE lines, ary;
ary = rb_ary_new();
while (next_argv()) {
if (ARGF_GENERIC_INPUT_P()) {
lines = forward_current(rb_intern("readlines"), argc, argv);
}
else {
lines = rb_io_readlines(argc, argv, ARGF.current_file);
argf_close(argf);
}
ARGF.next_p = 1;
rb_ary_concat(ary, lines);
ARGF.lineno = lineno + RARRAY_LEN(ary);
ARGF.last_lineno = ARGF.lineno;
}
ARGF.init_p = 0;
return ary;
}