Module: Ferret::Utils::StringHelper

Defined in:
lib/ferret/utils/string_helper.rb,
ext/string_helper.c

Defined Under Namespace

Classes: StringReader

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.string_difference(s1, s2) ⇒ Object

Compares two strings, character by character, and returns the first position where the two strings differ from one another. eg.

string_difference('dustbin', 'dusty') # => 4
string_difference('dustbin', 'evening') # => 0
string_difference('eve', 'evening') # => 3
s1

The first string to compare

s2

The second string to compare

returns

The first position where the two strings differ.



39
40
41
42
43
44
45
 
# File 'lib/ferret/utils/string_helper.rb', line 39

def StringHelper.string_difference(s1, s2) 
  len = [s1.length, s2.length].min
  len.times do |i|
    return i if (s1[i] != s2[i]) 
  end
  return len
end

Instance Method Details

#string_difference(rstr1, rstr2) ⇒ Object 



22
23
24
25
26
 
# File 'ext/string_helper.c', line 22

static VALUE
frt_sh_string_difference(VALUE self, VALUE rstr1, VALUE rstr2)
{
  return INT2FIX(frt_sh_string_difference_int(self, rstr1, rstr2));
}