Diff two arrays, finding inserts, removes, and moves.
npm install arraydiff
var arrayDiff = require('arraydiff');
var before = [0, 1, 2, 3];
var after = ['1', '2', 4, 5, 0];
// Compares with `===` by default
var diff = arrayDiff(before, after);
console.log('\nStandard diff:');
for (var i = 0; i < diff.length; i++) {
var item = diff[i];
console.log(item.type, item);
}
// A custom equality method is optional
var diff = arrayDiff(before, after, function(a, b) {
return a == b;
});
console.log('\nFuzzy equality diff:');
for (var i = 0; i < diff.length; i++) {
var item = diff[i];
console.log(item.type, item);
}Output:
Standard diff:
remove { index: 1, howMany: 3 }
insert { index: 0, values: [ '1', '2', 4, 5 ] }
Fuzzy equality diff:
remove { index: 3, howMany: 1 }
move { from: 1, to: 0, howMany: 2 }
insert { index: 2, values: [ 4, 5 ] }
Copyright (c) 2013 by Nate Smith
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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