public LongMatrix2D assign(
final LongMatrix2D y, final cern.colt.function.tlong.LongLongFunction function) {
checkShape(y);
if (y instanceof WrapperLongMatrix2D) {
IntArrayList rowList = new IntArrayList();
IntArrayList columnList = new IntArrayList();
LongArrayList valueList = new LongArrayList();
y.getNonZeros(rowList, columnList, valueList);
assign(y, function, rowList, columnList);
} else {
super.assign(y, function);
}
return this;
}
