performance/src/main/java/org/justinnk/masonssa/evaluation/DataFrame.java
/**
   * Appends all of data to the matching columns in this frame. Non-existing columns are copied as
   * they are to this frame.
   */
Appends all of data to the matching columns in this frame. Non-existing columns are copied as
they are to this frame.
Appends all of data to the matching columns in this frame . Non - existing columns are copied as they are to this frame .
public void append(DataFrame data) {
    for (Column col : data.columns) {
      Optional<Column> thisCol = this.get(col.name);
      if (thisCol.isPresent()) {
        thisCol.get().addEntries(col.data);
      } else {
        columns.add(col);
      }
    }
  }
public void append ( DataFrame data ) { for ( Column col : data . columns ) { Optional < Column > thisCol = this . get ( col . name ) ; if ( thisCol . isPresent ( ) ) { thisCol . get ( ) . addEntries ( col . data ) ; } else { columns . add ( col ) ; } } }
Appends all of data to the matching columns in this frame.
Appends all of data to the matching columns in this frame .