Find out if all attributes of the object are identical

I am trying to create the boolean variable hasMultipleCoverageLines in order to determine whether there are multiple unique values for coverageLineName within the coverageLines items. Is there a more efficient way to write this logic without explicitly checking each individual coverageLineName?

this.hasMultipleCoverageLines = !this.coverageLines.every((x) => x.coverageLineName === "Medical")
        && !this.coverageLines.every((x) => x.coverageLineName === "Dental")
        && !this.coverageLines.every((x) => x.coverageLineName === "Vision")
        && !this.coverageLines.every((x) => x.coverageLineName === "Life");
javascripttypescript

Answer №1

The power of a set lies in its ability to enforce uniqueness. By placing names into a set, we can easily determine if there are duplicate values.

let names = this.coverageLines.map(x => x.coverageLineName);
let set = new Set(names);
this.hasMultipleCoverageLines = set.size > 1;

For example, using the array ["Dental", "Dental", "Dental"] will result in a set size of 1, while ["Dental", "Vision", "Dental"] will yield a set size of 2, illustrating the concept effectively.

Answer №2

To determine if there are multiple coverage lines, you simply need to compare each line with the previous one.

const hasMultipleCoverageLines = (lines) => {
  return lines.some((line, i) => {
    return i > 0 && line.coverageLineName !== lines[i - 1].coverageLineName;
  });
};

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