Question

In: Computer Science

/* Complete this javascript file according to the individual instructions given in the comments. */ //...

/* 
Complete this javascript file according to the individual instructions
given in the comments. */

// 1) Declare an array named myArray
// Assign myArray three elements: 'Tuesday',3,true
// Print myArray to the console with console.log()


// 2) Use typeof on each element in myArray
// Example: typeof myArray[0];
// Print all 3 lines to the console with console.log()



// 3) Declare a variable named myStart and set it to
// the value of the length property applied of myArray
// Print the result to the console with console.log()



// 4) Use the .splice() method on myArray
// Use your variable myStart - 2 as the first parameter of .splice()
// Use 0 as the second parameter
// In the third parameter, specify 'hamburgers' as the element to add
// Print the resulting array to the console with console.log()



// 5) Declare an array named myPal
// Give myPal these 4 elements: 'taco','cat','race','car'
// Set a string equal the first element + the second element
// Print the string to the console with console.log()



// 6) Use the .concat() method to merge myArray and myPal
// Print the result to the console with console.log()



// 7) Use the .join() method on myPal and specify no connector parameter
// Print the result to the console with console.log()


// 8) Use .sort() on myArray
// Print the resulting array to the console with console.log()


// 9) Use .slice() on myPal and specify that it begins at
// myPal.length - 2
// Print the result to the console



// 10) **Solving a problem!
// Declare a string named revOrder that is equal to 'Taco cat'
// Utilize indexOf(), split(), splice(), reverse(), and join() to
// 1) turn the string into an array
// 2) locate and remove the empty space
// 3) Reverse the order of the array
// 4) Turn the array back into a string
// 5) Log each step to the console.
// Can you combine any of the steps into one statement?
// You should finish with a result of "tacocaT"

Solutions

Expert Solution

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Here a new web page with name "jsArrayDemo.html" is created, which contains following code.

jsArrayDemo.html :

<!DOCTYPE html>

<html lang="en">

<head>

<!-- title for web page -->

<title>javascript Array</title>

<meta charset="UTF-8">

<meta name="viewport" content="width=device-width, initial-scale=1">

</head>

<body>

<!-- <script> is used for javascript -->

<script>

// 1) Declare an array named myArray

// Assign myArray three elements: 'Tuesday',3,true

// Print myArray to the console with console.log()

var myArray=['Tuesday',3,true];

//using for loop ,print each array element

for(var i=0;i<myArray.length;i++){

console.log("myArray["+i+"] : "+myArray[i]);

}

// 2) Use typeof on each element in myArray

// Example: typeof myArray[0];

// Print all 3 lines to the console with console.log()

for(var i=0;i<myArray.length;i++){

console.log("typeof(myArray["+i+"]) : "+typeof(myArray[i]));

}

// 3) Declare a variable named myStart and set it to

// the value of the length property applied of myArray

// Print the result to the console with console.log()

var myStart=myArray.length;

console.log("myArray length : "+myStart);

// 4) Use the .splice() method on myArray

// Use your variable myStart - 2 as the first parameter of .splice()

// Use 0 as the second parameter

// In the third parameter, specify 'hamburgers' as the element to add

// Print the resulting array to the console with console.log()

myArray.splice(myStart - 2 ,0,"hamburgers");

for(var i=0;i<myArray.length;i++){

console.log("myArray["+i+"] : "+myArray[i]);

}

// 5) Declare an array named myPal

// Give myPal these 4 elements: 'taco','cat','race','car'

// Set a string equal the first element + the second element

// Print the string to the console with console.log()

var myPal=['taco','cat','race','car'];

console.log(myPal[0]+myPal[1]);

// 6) Use the .concat() method to merge myArray and myPal

// Print the result to the console with console.log()

myArray=myArray.concat(myPal);

for(var i=0;i<myArray.length;i++){

console.log("myArray["+i+"] : "+myArray[i]);

}

// 7) Use the .join() method on myPal and specify no connector parameter

// Print the result to the console with console.log()

console.log(myPal.join());

// 8) Use .sort() on myArray

// Print the resulting array to the console with console.log()

myArray.sort();

for(var i=0;i<myArray.length;i++){

console.log("myArray["+i+"] : "+myArray[i]);

}

// 9) Use .slice() on myPal and specify that it begins at

// myPal.length - 2

// Print the result to the console

console.log(myPal.slice(myPal.length - 2));

// 10) **Solving a problem!

// Declare a string named revOrder that is equal to 'Taco cat'

// Utilize indexOf(), split(), splice(), reverse(), and join() to

// 1) turn the string into an array

// 2) locate and remove the empty space

// 3) Reverse the order of the array

// 4) Turn the array back into a string

// 5) Log each step to the console.

// Can you combine any of the steps into one statement?

// You should finish with a result of "tacocaT"

var revOrder="Taco cat";

var revOrderArray=revOrder.split(" "); //reversing array

for(var i=0;i<revOrderArray.length;i++){

console.log("revOrderArray["+i+"] : "+revOrderArray[i]);

}

var removeIndex=revOrder.indexOf(" ");

console.log(removeIndex);

//array reverse

var arrayReverse=revOrderArray.reverse();

for(var i=0;i<revOrderArray.length;i++){

console.log("revOrderArray["+i+"] : "+revOrderArray[i]);

}

//array join

var arrayJoin=arrayReverse.join(" ");

console.log("String is : "+arrayJoin);

</script>

</body>

</html>

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

Output : Open web page jsArrayDemo.html in the browser and will get the screen as shown below

Screen 1 :jsArrayDemo.html

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.

venereology answered 9 months ago
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