To Be Or Not To Be | #2704 | LeetCode Solution
Author: neptune | 03rd-Sep-2023
Problem : To Be Or Not To Be | #2704 | LeetCode
Write a function that helps developers test their code. It should take in any value and return an object with the following two functions.
1. toBe(val) accepts another value and returns true if the two values === each other. If they are not equal, it should throw an error "Not Equal".
2. notToBe(val) accepts another value and returns true if the two values !== each other. If they are equal, it should throw an error "Equal".
Example 1:
Input: func = () => expect(5).toBe(5)
Output: {"value": true}
Explanation: 5 === 5 so this expression returns true.
Example 2:
Input: func = () => expect(5).toBe(null)
Output: {"error": "Not Equal"}
Explanation: 5 !== null so this expression throws the error "Not Equal".
Example 3:
Input: func = () => expect(5).notToBe(null)
Output: {"value": true}
Explanation: 5 !== null so this expression returns true.
Solution:
/**
* @param {string} val
* @return {Object}
*/
var expect = function(val) {
return {
toBe: function(otherVal) {
if (val === otherVal){
return true
} else {
throw new Error("Not Equal")
}
},
notToBe: function(otherVal) {
if (val !== otherVal){
return true
} else {
throw new Error("Equal")
}
}
}
};
/**
* expect(5).toBe(5); // true
* expect(5).notToBe(5); // throws "Equal"
*/
Explanation:
1. We start by defining a variable except as a function. This function takes one parameter, val, which is the value you want to perform comparisons on.
2. The toBe function is used for checking if val is equal to otherVal. It takes otherVal as its parameter and performs the comparison.
3. If val is equal to otherVal, it returns an object with a value property set to true, indicating that the values are equal.
4. If val is not equal to otherVal, it throws an error with the message "Not Equal."
5. The notToBe function is used for checking if val is not equal to otherVal. It takes otherVal as its parameter and performs the comparison.
6. If val is not equal to otherVal, it returns an object with a value property set to true, indicating that the values are not equal.
7. If val is equal to otherVal, it throws an error with the message "Equal."
#JavaScript #Hackerrank #Python #Motivation #AI #React.js #Testing #Interview #SQL #Selenium #LeetCode #Problem Solving #Machine learning #Java #GPT #AWS #API #IT #Algorithms #Github #Jobs #Microservice #Certifications #Projects #Google #Django #Story #Pip #Data Science #Postman #Health #Twitter #Elon Musk #Node.js
Apply Transform Over Each Element in Array | #2635 | LeetCode SolutionAuthor: neptune | 05th-Sep-2023
#JavaScript #LeetCode
Given an integer array `arr` and a mapping function `fn`, return a new array with a transformation applied to each element...
Counter | #2620 | LeetCode SolutionAuthor: neptune | 02nd-Sep-2023
#JavaScript #LeetCode
Given an integer n, return a counter function. This counter function returns n and then n + 1, n + 2, etc...
Function Composition | #2629 | LeetCode SolutionAuthor: neptune | 09th-Sep-2023
#JavaScript #LeetCode
Given an array of functions [f1, f2, f3, ..., fn], return a new function fn that is the function composition of the array of functions...
Counter 2 | #2665 | LeetCode SolutionAuthor: neptune | 04th-Sep-2023
#JavaScript #LeetCode
Write function 'createCounter' It accept an initial integer 'init' It should return an object with three functions- increment() , decrement(), reset()...
Arrow Functions in JavaScript | ES6Author: neptune | 26th-Mar-2023
#JavaScript #React.js
In this article, we will explore the syntax and usage of arrow functions in detail, along with some examples...
Array Reduce Transformation | #2626 | LeetCode SolutionAuthor: neptune | 09th-Sep-2023
#JavaScript #LeetCode
Given an integer array `nums` and a reducer function `fn`, and an initial value `init`, return a reduced array...
Different ways to handle state in React applicationsAuthor: neptune | 21st-Jun-2023
#JavaScript #React.js
This article explores different ways to manage states in React, including local component state, context API, and state management libraries like Redux...
Add Two Promises | #2723 | LeetCode SolutionAuthor: neptune | 12th-Sep-2023
#JavaScript #LeetCode
Given two promises `promise1` and `promise2`, return a new `promise`. `promise1` and `promise2` will both resolve with a number...
Filter Elements from Array | #2634 | LeetCode SolutionAuthor: neptune | 06th-Sep-2023
#JavaScript #LeetCode
Given an integer array `arr` and a filtering function `fn`, return a filtered array `filteredArr`...
Is Object Empty | #2727 | LeetCode | JavaScript SolutionAuthor: neptune | 01st-Sep-2023
#JavaScript #LeetCode
Given an object or an array, return if it is empty...
Chunk Array | #2677 | LeetCode SolutionAuthor: neptune | 19th-Sep-2023
#JavaScript #LeetCode
Given an array arr and a chunk `size`, return a `chunked` array...
Managing Virtual Environments in React JavaScript ProjectsAuthor: neptune | 28th-Jun-2023
#JavaScript #React.js
Virtual environments are a valuable tool in React JavaScript projects as they allow developers to isolate dependencies, manage package versions, and maintain project consistency...
Allow One Function Call | #2666 | LeetCode SolutionAuthor: neptune | 11th-Sep-2023
#JavaScript #LeetCode
Given a function `fn`, return a new function that is identical to the original function except that it ensures `fn` is called at most once...
Memoize | #2634 | LeetCode SolutionAuthor: neptune | 12th-Sep-2023
#JavaScript #LeetCode
A memoized function is a function that will never be called twice with the same inputs. Instead it will return a cached value...
Array Prototype Last | #2619 | LeetCode SolutionAuthor: neptune | 20th-Sep-2023
#JavaScript #LeetCode
Write code that enhances all arrays such that you can call the `array.last()` method on any array and it will return the last element...
All You Need to Know About Pure Functions & Impure Functions in JavaScriptAuthor: neptune | 02nd-Apr-2023
#JavaScript #React.js
You should try to use pure functions whenever possible and avoid using impure functions unless necessary...
A Guide to Writing Clean, Readable, and Maintainable Code in JavaScriptAuthor: neptune | 23rd-Feb-2024
#JavaScript
By incorporating these principles into your coding practices, you contribute to creating code that is not only functional but also maintainable and easily understandable by your peers...
From REST to GraphQL: The Future of API DesignAuthor: neptune | 25th-Feb-2024
#JavaScript
Unlike traditional REST APIs, GraphQL provides a more flexible and intuitive approach to data querying and retrieval...
6 Brilliant JavaScript Frameworks for Every DeveloperAuthor: neptune | 16th-Feb-2024
#JavaScript
JavaScript's web development with frameworks like Synaptic.js for neural networks, OpenCV.js for multimedia processing, D3.js for dynamic data visualizations, Compromise.js for efficient NLP, ConvNet...
State in React: Component State and Controlling BehaviorAuthor: neptune | 21st-Feb-2024
#JavaScript #React.js
React, a popular JavaScript library for building user interfaces, introduces the concept of state and lifecycle methods to help developers manage the dynamic nature of components...
Decode Secret Language of React: Game-Changer for Web DevelopersAuthor: neptune | 25th-Feb-2024
#JavaScript #React.js
JSX is a syntax extension for JavaScript recommended by React for describing what the UI should look like...
View More