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only in javascript 1.Define a method named roleOf that takes the name of an actor as...

only in javascript

1.Define a method named roleOf that takes the name of an actor as an argument and returns that actor's role. Ex: roleOf("Keira Knightley") returns "Elizabeth Swann". Hint: A method may access the object's properties using the keyword this. Ex: this.cast accesses the object's cast property.

var movie = { // Code will be tested with different actors and movies
name: "Pirates of the Caribbean: At World's End",
director: "Gore Verbinski",
composer: "Hans Zimmer",
cast: {
"Johnny Depp": "Jack Sparrow",
"Orlando Bloom": "Will Turner",
"Keira Knightley": "Elizabeth Swann",
"Geoffrey Rush": "Hector Barbossa"
},
roleOf: function(actorName) {

/* Your solution goes here */

}
};

--------------------------------------------------------------------------------------

2.

A drink costs 2 dollars. A hamburger costs 5 dollars. Given the number of each, compute total cost and assign to totalCost. Ex: 2 drinks and 3 hamburgers yields totalCost of 19.

var drinkQuantity = 2; // Code tested with values: 2 and 4
var hamburgerQuantity = 3; // Code tested with values: 3 and 7

var totalCost = 0;

----------------------------------------------------------------------------------

3.Loop through the characters in the string wiseProverb and assign numAppearances with the number of times 'e' appears in the string.

var wiseProverb = "When in Rome do as Romans do."; // Code will be tested with "You can lead a horse to water, but you can't make him drink. If you want something done right, you have to do it yourself."
var numAppearances = 0;

/* Your solution goes here */

-------------------------------------------------------------------------------

4.

Update the variable newsUpdated to the month July using Date methods.

var newsUpdated = new Date(2010, 3, 21);

/* Your solution goes here */

--------------------------------------------------------------------

5.

Add a throw statement to the processNumbers function that throws the message "All elements in the list should be numbers." if one of the elements in numberList is not a number. Hint: The function isNaN() returns true if the parameter is not a number.

function processNumbers(numberList) { // Code will be tested with different values of numberList
var result = 0;

for (var index = 0; index < numberList.length; index++) {
  
/* Your solution goes here */
  
result += numberList[index] * 1.3 * index;
}

return result;
}

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Homework Answers

Answer #1

Please let me know if you need more information:-

=============================================


<html>
<body>
<p id="demo"></p>
<script>
/*
1.Define a method named roleOf that takes the name of an actor as an argument and returns that actor's role. Ex: roleOf("Keira Knightley") returns "Elizabeth Swann". Hint: A method may access the object's properties using the keyword this. Ex: this.cast accesses the object's cast property.
*/
var movie = { // Code will be tested with different actors and movies
name: "Pirates of the Caribbean: At World's End",
director: "Gore Verbinski",
composer: "Hans Zimmer",
cast: {
"Johnny Depp": "Jack Sparrow",
"Orlando Bloom": "Will Turner",
"Keira Knightley": "Elizabeth Swann",
"Geoffrey Rush": "Hector Barbossa"
},
roleOf: function(actorName) {
/* Your solution goes here */
return this.cast[actorName];
}
};
document.getElementById("demo").innerHTML = movie.roleOf("Keira Knightley");
document.getElementById("demo").innerHTML += "<hr>";

/*
A drink costs 2 dollars. A hamburger costs 5 dollars. Given the number of each, compute total cost and assign to totalCost. Ex: 2 drinks and 3 hamburgers yields totalCost of 19.
*/
var drinkCost = 2;
var hamburgerCost = 5;

var drinkQuantity = 2; // Code tested with values: 2 and 4
var hamburgerQuantity = 3; // Code tested with values: 3 and 7

var totalCost = (drinkCost * drinkQuantity) + (hamburgerCost* hamburgerQuantity);
document.getElementById("demo").innerHTML += "totalCost:" + totalCost;

drinkQuantity = 4;
hamburgerQuantity = 7;

totalCost = (drinkCost * drinkQuantity) + (hamburgerCost* hamburgerQuantity);
document.getElementById("demo").innerHTML += "<br> totalCost:" + totalCost;
document.getElementById("demo").innerHTML += "<hr>";


/*
3.Loop through the characters in the string wiseProverb and assign numAppearances with the number of times 'e' appears in the string.

var wiseProverb = "When in Rome do as Romans do."; // Code will be tested with "You can lead a horse to water, but you can't make him drink. If you want something done right, you have to do it yourself."
*/

var numAppearances = 0;
/* Your solution goes here */
var wiseProverb = "When in Rome do as Romans do.";
for(var i=0; i <wiseProverb.length;i++){
   if(wiseProverb[i] == 'e'){
   numAppearances++;
}
}
document.getElementById("demo").innerHTML += "The number of times 'e' appears in the string:" + numAppearances;

numAppearances=0;
wiseProverb = "You can lead a horse to water, but you can't make him drink. If you want something done right, you have to do it yourself.";
for(var i=0; i <wiseProverb.length;i++){
   if(wiseProverb[i] == 'e'){
   numAppearances++;
}
}
document.getElementById("demo").innerHTML += "<br> The number of times 'e' appears in the string:" + numAppearances;
document.getElementById("demo").innerHTML += "<hr>";

/* 4.Update the variable newsUpdated to the month July using Date methods.
var newsUpdated = new Date(2010, 3, 21); */
/* Your solution goes here */
var newsUpdated = new Date(2010, 3, 21);
newsUpdated.setMonth(6); //6 represents july month
document.getElementById("demo").innerHTML += newsUpdated;
document.getElementById("demo").innerHTML += "<hr>";

/*
5.Add a throw statement to the processNumbers function that throws the message "All elements in the list should be numbers." if one of the elements in numberList is not a number. Hint: The function isNaN() returns true if the parameter is not a number.
*/
function processNumbers(numberList) { // Code will be tested with different values of numberList
var result = 0;

for (var index = 0; index < numberList.length; index++) {
  
/* Your solution goes here */
if(isNaN(numberList[index])) {
throw "All elements in the list should be numbers."
}
  
result += numberList[index] * 1.3 * index;
}

return result;
}

try{
result = processNumbers(['2','5','6',"w",'56']);
document.getElementById("demo").innerHTML += result;
}catch(err){
document.getElementById("demo").innerHTML += err;
}
document.getElementById("demo").innerHTML += "<hr>";

</script>

</body>
</html>

===

OUTPUT;-

==

Elizabeth Swann

totalCost:19
totalCost:43

The number of times 'e' appears in the string:2
The number of times 'e' appears in the string:8

Wed Jul 21 2010 00:00:00 GMT+0530 (India Standard Time)

All elements in the list should be numbers.

==

==

==

==

==

==

Please let me know if you need more information.

==

Thanks

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