<section id="description">
  <p>Объекты можно рассматривать как хранилище ключей / значений, например как словарь. Если у вас есть табличные
    данные, вы можете использовать для «поиска» объект, а не оператор <code>switch</code> или цепочки
    <code>if/else</code>. Это наиболее полезно, когда вы знаете, что ваши входные данные ограничены определенным
    диапазоном. Вот пример простого обратного алфавитного поиска:
  <pre class="language-js"><code>const alpha = {
  1:"Z",
  2:"Y",
  3:"X",
  4:"W",
  // ...
  24:"C",
  25:"B",
  26:"A"
};

alpha[2]; // Y
alpha[24]; // C

const value = 2;
alpha[value]; // Y</code></pre>
  </p>
</section>

// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  switch(val) {
    case "alpha":
      result = "Adams";
      break;
    case "bravo":
      result = "Boston";
      break;
    case "charlie":
      result = "Chicago";
      break;
    case "delta":
      result = "Denver";
      break;
    case "echo":
      result = "Easy";
      break;
    case "foxtrot":
      result = "Frank";
  }

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


index

Использование объектов для поиска

Using Objects for Lookups

<code>phoneticLookup("alpha")</code> should equal <code>"Adams"</code>

<code>phoneticLookup("bravo")</code> should equal <code>"Boston"</code>

<code>phoneticLookup("charlie")</code> should equal <code>"Chicago"</code>

<code>phoneticLookup("delta")</code> should equal <code>"Denver"</code>

<code>phoneticLookup("echo")</code> should equal <code>"Easy"</code>

<code>phoneticLookup("foxtrot")</code> should equal <code>"Frank"</code>

<code>phoneticLookup("")</code> should equal <code>undefined</code>

You should not modify the <code>return</code> statement

You should not use <code>case</code>, <code>switch</code>, or <code>if</code> statements

javascript-algorithms-and-data-structures

Basic JavaScript

// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  

  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }



  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }

  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
 var lookup = {
   "alpha":"Adams",
     "bravo":"Boston",
     "charlie":"Chicago",
     "delta":"Denver",
     "echo":"Easy",
     "foxtrot":"Frank",
  }
var result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup ={
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  };
  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    alpha:"Adams",
    bravo:"Boston",
    charlie:"Chicago",
    delta:"Denver",
    echo:"Easy",
    foxtrot:"Frank"
  }

  // Only change code above this line
  result = lookup[val];
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  }
  var result = lookup[val];
  return result;
}

phoneticLookup("alpha");

// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
var lookup  = {
   "alpha":"Adams",
   "bravo":"Boston",
  "charlie":"Chicago",
  "delta":"Denver",
"echo":"Easy",
  "foxtrot":"Frank"
  };
result=lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
"alpha": "Adams",
"bravo": "Boston",
"charlie": "Chicago", 
"delta": "Denver",
"echo": "Easy",
"foxtrot":"Frank",
  };
result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line

  const lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  }

  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
     "alpha" : "Adams",
     "bravo" : "Boston",
     "charlie" : "Chicago",
      "delta" : "Denver",
     "echo" : "Easy",
     "foxtrot": "Frank"
  }
  result = lookup[val];
  // Only change code above this line
  return result;
}
// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  

  // Only change code below this line
  var alpha= {
    "alpha":"Adams",
    "bravo":"Boston",
    "charlie":"Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank",
    "":undefined
  }

  var result = alpha[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }
result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line

  const lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank",
  }

  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  };
  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var phoneticLookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago", 
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }

  // Only change code above this line
  result = phoneticLookup[val];
  return result;
}

// Change this value to test
phoneticLookup("charlie");

// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
 var lookup = {
"alpha":"Adams",
"bravo":"Boston",
"charlie":"Chicago",
"delta":"Denver",
"echo":"Easy",
"foxtrot":"Frank",
  }
result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank",
  }
  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot":"Frank"
  };

  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = '';
  var lookup = {
    'alpha': 'Adams',
    'bravo': 'Boston',
    'charlie': 'Chicago',
    'delta': 'Denver',
    'echo': 'Easy',
    'foxtrot': 'Frank'
  };
  result = lookup[val];
  return result;
}
phoneticLookup('echo')
"Easy"


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  };
  result = lookup[val];
  console.log(`${val} ${result}`);
  // Only change code above this line
  return result;
}
// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  }  

  result = lookup[val]

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }
  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    "alpha":"Adams",
    "bravo":"Boston",
    "charlie":"Chicago",
    "delta":"Denver",
    "echo":"Easy",
    "foxtrot":"Frank"
  };
  result = lookup[val]; 
  
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  };
  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");



// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line

  var lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  };
  result=lookup[val];
  // Only change code above this line
  return result;
};

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  };
  result = lookup[val];

// Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line

  var lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  }

  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  }

  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
 var lookup = {
"alpha": "Adams",

"bravo": "Boston",

"charlie": "Chicago",

"delta": "Denver",

"echo": "Easy",

"foxtrot": "Frank",
  }
  ;
result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  };
  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }

  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("alpha");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }

  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
console.log(phoneticLookup("charlie"));


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  };
  result = lookup[val]

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
  "alpha": "Adams",
  "bravo": "Boston",
  "charlie": "Chicago",
  "delta": "Denver",
  "echo": "Easy",
  "foxtrot": "Frank"
  };
result= lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }
  result = lookup[val]
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  let lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  };
  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  };


  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha":"Adams",
    "bravo":"Boston",
    "charlie":"Chicago",
    "delta":"Denver",
    "echo":"Easy",
    "foxtrot":"Frank"
  }

  // Only change code above this line
  result = lookup[val];
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  }
result = lookup[val];
  // Only change code above this line
  return result;
}
 
// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

var lookup = {
  "alpha":"Adams",
  "bravo":"Boston",
  "charlie":"Chicago",
  "delta":"Denver",
  "echo":"Easy",
  "foxtrot":"Frank"
};
  result = lookup[val]
    
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line

  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }
  result = lookup[val]
 

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  };

  // Only change code above this line
  return lookup[val];
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";
  var lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  };
  // After converting our case statements into object properties you can make use of the variable `result` to let the function return the correct value.


  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank",
  };


  // Only change code above this line
  return lookup[val];
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank",
  }
  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank",
  }

result = lookup[val]
// Only change code above this line
return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";
  var lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  };
  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

   var lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
     "echo": "Easy",
    "foxtrot":"Frank"
  };
   result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
console.log(phoneticLookup("charlie"));


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }

  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");



// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: 'Chicago',
    delta: 'Denver',
    echo: 'Easy',
    foxtrot: 'Frank'
  }

  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
 var lookup = {
     "alpha": "Adams",
    "bravo": "Boston",
    "charlie":"Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  };
result=lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
console.log(phoneticLookup("charlie"));


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  let lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  };
  // switch(val) {
  //   case "alpha":
  //     result = "Adams";
  //     break;
  //   case "bravo":
  //     result = "Boston";
  //     break;
  //   case "charlie":
  //     result = "Chicago";
  //     break;
  //   case "delta":
  //     result = "Denver";
  //     break;
  //   case "echo":
  //     result = "Easy";
  //     break;
  //   case "foxtrot":
  //     result = "Frank";
  // }

  // Only change code above this line
  result = lookup[val];
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }
  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  let obj = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank",
  };
  result = obj[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  };
  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    alpha: "Adams",
    bravo: "Boston",
    charlie: "Chicago",
    delta: "Denver",
    echo: "Easy",
    foxtrot: "Frank"
  };
return lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup = {
    'alpha': "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot":"Frank"
  }
  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  };

  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank",
  }

  // Only change code above this line
  result = lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  var lookup =  {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank",
  }
  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  /*switch(val) {
    case "alpha":
      result = "Adams";
      break;
    case "bravo":
      result = "Boston";
      break;
    case "charlie":
      result = "Chicago";
      break;
    case "delta":
      result = "Denver";
      break;
    case "echo":
      result = "Easy";
      break;
    case "foxtrot":
      result = "Frank";
  }*/
  //let key = String(val);
  //console.log("input " + val);
  const lookup={
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank",
  }
  //console.log("output " + lookup.val);
  //result=lookup.val;
  result=lookup[val];
  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha": "Adams",
    "bravo": "Boston",
    "charlie": "Chicago",
    "delta": "Denver",
    "echo": "Easy",
    "foxtrot": "Frank"
  }

  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


// Setup
function phoneticLookup(val) {
  var result = "";

  // Only change code below this line
  const lookup = {
    "alpha":"Adams",
    "bravo":"Boston",
    "charlie":"Chicago",
    "delta":"Denver",
    "echo":"Easy",
    "foxtrot":"Frank"
  };
  result = lookup[val];

  // Only change code above this line
  return result;
}

// Change this value to test
phoneticLookup("charlie");


RichText

Потому что он в первом варианте пытается имеено получить свойство val. Это тоже самое что lookup["val"], то есть строчное значение "val". А во втором варианте запрашивается свойство по значению переменной val. То есть если val = "my_value", то будет получен lookup[val] === lookup["my_value"]

не понимаю почему не работает первый вариант  

//result=lookup.val;
  result=lookup[val];

FreeCode.Academy

Обсуждение задания "Using Objects for Lookups"

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