Conditional Statements: Part 3

Still we can improve our conditional statements. How?

Checking the conditions and returning the response at the same time.

// Legacy conditional statement
  function getDesignation(designation?: number): string {
    let designationInString: string;
    if (designation === undefined) {
      designationInString = "";
    } else if (designation === 1) {
      designationInString = "Dev";
    } else if (designation === 2) {
      designationInString = "QA";
    } else if (designation === 3) {
      designationInString = "Analyst";
    } else {
      designationInString = "";
    }
    return designationInString;
  }

But we can do better than this now.

// New conditional statement
  function getDesignation(designation?: number): string {
    const designationList: {[key:number]: string} = {
      1: "Dev",
      2: "QA",
      3: "Analyst",
    };
    // Always check for the non valid conditions first
    if (!designation) return "";
    return designationList[designation] || "";
  }