TIL a clean way to refactor if/else statements

POSTED ON: Aug 25, 2021

TAGS: javascript

Not using if-statements gets you closer to the code-as-data concept, which opens the door for unique capabilities like modifying the code as it is being executed!

Here is a solution using an if-statement:

const weekendOrWeekday = (inputDate) => {
  const day = inputDate.getDay();
  if (day === 0 || day === 6) {
    return 'weekend';
  }

  return 'weekday';
  // Or, for ternary fans:
  // return (day === 0 || day === 6) ? 'weekend' : 'weekday';
};
console.log(weekendOrWeekday(new Date()));

Here is a solution without if-statements:

const weekendOrWeekday = (inputDate) => {
  const day = inputDate.getDay();
  return weekendOrWeekday.labels[day] ||
         weekendOrWeekday.labels['default'];
};
weekendOrWeekday.labels = {
  0: 'weekend',
  6: 'weekend',
  default: 'weekday'
};
console.log(weekendOrWeekday(new Date()));

VIA
Coding Tip: Try to Code Without If-statements

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