unsafe

Author: Baunsgaard

src/main/java/org/apache/sysds/runtime/compress/colgroup/mapping/MapToCharPByte.java

@@ -142,8 +142,7 @@ public void write(DataOutput out) throws IOException {
 		out.writeInt(_data_c.length);
 		for(int i = 0; i < _data_c.length; i++)
 			out.writeChar(_data_c[i]);
-		for(int i = 0; i < _data_c.length; i++)
-			out.writeByte(_data_b[i]);
+		out.write(_data_b);
 	}
 
 	protected static MapToCharPByte readFields(DataInput in) throws IOException {

src/main/java/org/apache/sysds/runtime/frame/data/columns/BitSetArray.java

@@ -107,7 +107,7 @@ public synchronized void set(int index, boolean value) {
 	@Override
 	public void setNullsFromString(int rl, int ru, Array<String> value) {
 
-		final boolean unsafe = ru % 64 != 63 || rl % 64 != 0;
+		final boolean unsafe = ru % 64 != 0 || rl % 64 != 0;
 		// ensure that it is safe to modify the values in the ranges.
 
 		if(unsafe) {