Today I Learned - Rocky Kev

TIL Getting rid of if/else and switch statements

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TAGS: javascript

Getting rid of if/else and switch statements


// LAME
function getColor(fruit) {
   if (fruit.toLowerCase() === 'apple') {
       return 'red';
   } else if (fruit.toLowerCase() === 'banana') {
       return 'yellow';
   } if (fruit.toLowerCase() === 'orange') {
       return 'orange';
   } if (fruit.toLowerCase() === 'blueberry') {
       return 'blue';
   } if (fruit.toLowerCase() === 'lime') {
       return 'green';
   }

   return 'unknown';
}

// MEH
function getColor(fruit) {
   switch(fruit.toLowerCase()) {
       case 'apple':
           return 'red';
       case 'banana':
           return 'yellow';
       case 'orange':
           return 'orange';
       case 'blueberry':
           return 'blue';
       case 'lime':
           return 'green';
       default:
           return 'unknown';
   }
}


// VERY NICE
function getColor(fruit) {
   const fruits = {
       'apple': 'red',
       'banana': 'yellow',
       'orange': 'orange',
       'blueberry': 'blue',
       'lime': 'green',
   };

   return fruits[fruit.toLowerCase()] || 'unknown';
}

via https://blog.logrocket.com/refactoring-cascading-conditionals-favor-readability/

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