Course Content
JavaScript Data Structures
JavaScript Data Structures
1. Introduction and Prerequisites
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
Advanced Array Operations Sum Up
map() Method
- Purpose: Iterates over each element of the original array and applies a specified callback function to produce a new array;
- Syntax:
- Key Points:
- Does not modify the original array;
- Returns a new array of the same length;
- Useful for transforming each element of an array.
filter() Method
- Purpose: Selects elements that meet a particular condition, creating a new array;
- Syntax:
- Key Points:
- Does not alter the original array;
- Returns a new array containing elements that satisfy the callback condition;
- Provides a way to filter elements based on specific criteria.
find() Method
- Purpose: Discovers and retrieves the first matching element in an array;
- Syntax:
- Key Points:
- Does not alter the original array;
- Halts upon locating the initial match, returning that specific element;
- Returns
undefinedif no matching element is found.
sort() Method
- Purpose: Modifies the original array, arranging its elements in a new order;
- Syntax:
- Key Points:
- Transforms the original array;
- By default, arranges elements in ascending order;
- Custom sorting can be achieved using a compare function.
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Section 5. Chapter 9
