compare-strings

Finds degree of similarity between two strings, based on Dice's Coefficient and Levenshtein Distance.

Table of Contents

• Usage
• API
  • compareTwoStrings(string1, string2)
    • Arguments
    • Returns
    • Examples

Usage

Install using:

npm install compare-strings --save

In your code:

var compareStrings = require('compare-strings');
 
var similarity = compareStrings('healed', 'sealed');

API

compareStrings(string1, string2)

Returns a fraction between 0 and 1, which indicates the degree of similarity between the two strings. 0 indicates completely different strings, 1 indicates identical strings. The comparison is case-insensitive.

Arguments

1. string1 (string): The first string
2. string2 (string): The second string

Order does not make a difference.

Returns

(number): A fraction from 0 to 1, both inclusive. Higher number indicates more similarity.

Examples

stringSimilarity.compareTwoStrings('healed', 'sealed');
// → 0.8166666666666667
 
stringSimilarity.compareTwoStrings('Olive-green table for sale, in extremely good condition.', 
  'For sale: table in very good  condition, olive green in colour.');
// → 0.4774114774114774
 
stringSimilarity.compareTwoStrings('Olive-green table for sale, in extremely good condition.', 
  'For sale: green Subaru Impreza, 210,000 miles');
// → 0.27886002886002886
 
stringSimilarity.compareTwoStrings('Olive-green table for sale, in extremely good condition.', 
  'Wanted: mountain bike with at least 21 gears.');
// → 0.159992784992785