End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
String#getbyte
getbyte(index) → integer
string.c
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static VALUE
rb_str_getbyte(VALUE str, VALUE index)
{
long pos = NUM2LONG(index);
if (pos < 0)
pos += RSTRING_LEN(str);
if (pos < 0 || RSTRING_LEN(str) <= pos)
return Qnil;
return INT2FIX((unsigned char)RSTRING_PTR(str)[pos]);
}
Returns the byte at zero-based index as an integer:
Example
s = 'abcde' # => "abcde" s.getbyte(0) # => 97 s.getbyte(1) # => 98
Related: String#setbyte.