query operator about danfojs HOT 1 OPEN

const query = [
  {
    column: "ModelName",
    is: "==",
    to: "model"  
  },
  {
    column: "Timestamp",
    is: ">=",
    to: start  
  },
  {
    column: "Timestamp",
    is: "<=",
    to: end 
  }
];

const finalQuery = query.reduce((acc, condition, index) => {
  if (condition.is === '>=') {
    return index === 0 ? this.datapoints[condition.column].gte(condition.to) : acc.and(this.datapoints[condition.column].gte(condition.to));
  } else if (condition.is === '<=') {
    return index === 0 ? this.datapoints[condition.column].lte(condition.to) : acc.and(this.datapoints[condition.column].lte(condition.to));
  } else if (condition.is === '==') {
    return index === 0 ? this.datapoints[condition.column].eq(condition.to) : acc.and(this.datapoints[condition.column].eq(condition.to));
  }
}, null);

const filtered = this.datapoints.query(finalQuery);