performance/src/main/java/org/justinnk/masonssa/evaluation/DataFrame.java
/**
   * Computes a function on an existing value at the index of the given column (or null, if there is
   * no value associated with the index).
   */
Computes a function on an existing value at the index of the given column (or null, if there is
no value associated with the index).
Computes a function on an existing value at the index of the given column ( or null if there is no value associated with the index ) .
public void compute(String column, int index, BiFunction<Object, Object, Object> func) {
    Optional<Column> c = get(column);
    if (c.isPresent()) {
      c.get().compute(index, func);
    } else {
      Column nC = new Column(column);
      nC.compute(index, func);
      columns.add(nC);
    }
  }
public void compute ( String column , int index , BiFunction < Object , Object , Object > func ) { Optional < Column > c = get ( column ) ; if ( c . isPresent ( ) ) { c . get ( ) . compute ( index , func ) ; } else { Column nC = new Column ( column ) ; nC . compute ( index , func ) ; columns . add ( nC ) ; } }
Computes a function on an existing value at the index of the given column (or null, if there is
 no value associated with the index).
Computes a function on an existing value at the index of the given column ( or null if there is no value associated with the index ) .