I’ll be using the cjsDiff library
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You can report on any combination of additions, deletions or no changes. This example does them all.
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// compare var diffs = cjsDiff.JsDiff.diffChars( 'quick brown fox jum ove lazy dog', 'the quick brown fox jumped over the lazy dog' ); Logger.log("\n" + diffs.map(function (d) { if (!d.removed && !d.added ) { return 'no changes--'+d.count + ' chars\n '+d.value; } if (d.removed) { return 'removed--' + d.count + ' chars\n '+d.value; } if (d.added) { return 'added--' + d.count + ' chars\n '+d.value; } }).join ("\n")); |
And the result
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added--4 chars the no changes--19 chars quick brown fox jum added--3 chars ped no changes--4 chars ove added--1 chars r no changes--1 chars added--4 chars the no changes--8 chars lazy dog |
If that doesn’t quite do it for you, There are various options you can use as documented here