utils/difftochanges

Creates a set of changes which need to be applied to the input in order to transform it into the output. This function can be used with strings or arrays.

const input = Array.from( 'abc' );
const output = Array.from( 'xaby' );
const changes = diffToChanges( diff( input, output ), output );

changes.forEach( change => {
	if ( change.type == 'insert' ) {
		input.splice( change.index, 0, ...change.values );
	} else if ( change.type == 'delete' ) {
		input.splice( change.index, change.howMany );
	}
} );

input.join( '' ) == output.join( '' ); // -> true

Type parameters

T

The type of output array element.

Parameters

diff : readonly Array<DiffResult>

Result of diff.

output : ArrayLike<T>

The string or array which was passed as diff's output.

Returns

Array<Change<T>>

Set of changes (insert or delete) which need to be applied to the input in order to transform it into the output.