Class: Amatch::Hamming

Inherits:
Object
  • Object
show all
Defined in:
ext/amatch_ext.c,
ext/amatch_ext.c

Overview

This class computes the Hamming distance between two strings.

The Hamming distance between two strings is the number of characters, that
are different. Thus a hamming distance of 0 means an exact
match, a hamming distance of 1 means one character is different, and so on.
If one string is longer than the other string, the missing characters are
counted as different characters.

Instance Method Summary collapse

Constructor Details

#new(pattern) ⇒ Object

Creates a new Amatch::Hamming instance from pattern.



1395
1396
1397
1398
1399
1400
 
# File 'ext/amatch_ext.c', line 1395

static VALUE rb_Hamming_initialize(VALUE self, VALUE pattern)
{
    GET_STRUCT(General)
    General_pattern_set(amatch, pattern);
    return self;
}

Instance Method Details

#match ⇒ Object

#pattern ⇒ Object

call-seq: pattern -> pattern string

Returns the current pattern string of this Amatch::Sellers instance.

#pattern= ⇒ Object

call-seq: pattern=(pattern)

Sets the current pattern string of this Amatch::Sellers instance to pattern.

#similar(strings) ⇒ Object

Uses this Amatch::Hamming instance to match Amatch::Hamming#pattern against strings, and compute a Hamming distance metric number between 0.0 for very unsimilar strings and 1.0 for an exact match. strings has to be either a String or an Array of Strings. The returned results is either a Fixnum or an Array of Fixnums respectively.



1429
1430
1431
1432
1433
 
# File 'ext/amatch_ext.c', line 1429

static VALUE rb_Hamming_similar(VALUE self, VALUE strings)
{
    GET_STRUCT(General)
    return General_iterate_strings(amatch, strings, Hamming_similar);
}