abhimanyue :
I am trying to convert a List<Long>
to a double[]
in Java,
I did in the following way,
List<Long> longList = ........;
int len = longList.size();
double[] doubleArray = new double[len];
for (int i = 0; i < len; i++)
doubleArray[i] = (double) longList.get(i);
I am wondering if I can do it in a smarter way (and how) since I'm using Java-8
, I saw some conversion using the stream method. But couldn't find anything that can solve my problem.
assylias :
You could indeed do it using a stream:
double[] result = longList.stream()
.mapToDouble(Long::doubleValue)
.toArray();
It's maybe a little shorter and cleaner but you won't gain anything performance wise.