Diff two arrays, finding inserts, removes, and moves
npm install arraydiff-papandreouDiff 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 ] }
``
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