Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Challenge: Array Element Modifier | Mastering Arrays
JavaScript Data Structures

Challenge: Array Element ModifierChallenge: Array Element Modifier

Task

The task is to directly modify, check the length, and access specific elements within the array.

  1. Create an array called cities with the following city names:
    • "Shanghai";
    • "Sydney";
    • "Toronto";
    • "Frankfurt".
  2. Modify the city name at index 2 to "Miami" directly within the array.
  3. Log the length of the cities array using console.log().
  4. Retrieve and log the last city name in the array using console.log().

Expected Output:

  1. Use square brackets [] to create an array.
  2. Separate each element with the comma ,.
  3. Use console.log() to log the data.
  4. Use square brackets [] within the element index to access the element and change its value.
  5. Use the keyword length to get the array length.

Все було зрозуміло?

Секція 4. Розділ 4
course content

Зміст курсу

JavaScript Data Structures

1. Introduction and Prerequisites

Introduction to the CoursePrerequisites for the CourseWhat Will Be CoveredTips for Success

2. Objects Fundamentals

Understanding ObjectsObject CreationNested PropertiesChallenge: Creating an ObjectAccessing Object PropertiesChallenge: Accessing Object PropertiesWorking with PropertiesChallenge: Modifying and Extending ObjectObject MethodsProperties in MethodsChallenge: Working with Object MethodsObject Fundamentals Sum Up

3. Advanced Object Manipulation

Object Iteration with for...in LoopChallenge: Object Property ExplorerMethod hasOwnProperty()Challenge: hasOwnProperty() for Object Property IterationSpread OperatorChallenge: Merging Objects and Adding PropertiesObject DestructuringChallenge: DestructuringAdvanced Object Manipulation Sum Up

4. Mastering Arrays

Understanding ArraysChallenge: Array Element AccessorWorking with Array ElementsChallenge: Array Element Modifierfor LoopChallenge: Array Element Iterationfor...of LoopChallenge: Iteration with for...ofMastering Arrays Sum Up

5. Advanced Array Operations

map() MethodChallenge: Array Element Transformationfilter() MethodChallenge: Filtering Students by Exam Scoresfind() MethodChallenge: Discovering Featured Productssort() MethodChallenge: Sorting and Extracting PropertiesAdvanced Array Operations Sum UpCourse Sum Up

JavaScript Data Structures

Challenge: Array Element ModifierChallenge: Array Element Modifier

Task

The task is to directly modify, check the length, and access specific elements within the array.

  1. Create an array called cities with the following city names:
    • "Shanghai";
    • "Sydney";
    • "Toronto";
    • "Frankfurt".
  2. Modify the city name at index 2 to "Miami" directly within the array.
  3. Log the length of the cities array using console.log().
  4. Retrieve and log the last city name in the array using console.log().

Expected Output:

  1. Use square brackets [] to create an array.
  2. Separate each element with the comma ,.
  3. Use console.log() to log the data.
  4. Use square brackets [] within the element index to access the element and change its value.
  5. Use the keyword length to get the array length.

Все було зрозуміло?

Секція 4. Розділ 4
some-alt