js取两个数组的交集 取两个数组相同的元素

[javascript]代码库

function arrayIntersection ( a, b )
{
	var ai=0, bi=0;
	var result = new Array();
	while ( ai < a.length && bi < b.length )
	{
		if      ( a[ai] < b[bi] ) { ai++; }
		else if ( a[ai] > b[bi] ) { bi++; }
		else /* they're equal */
		{
			result.push ( a[ai] );
			ai++;
			bi++;
		}
	}
	return result;
}
console.log ( arrayIntersection ( [1,2,3],[2,3,4,5,6] ) );//[2,3]