JavaScript: Negates a predicate function

JavaScript fundamental (ES6 Syntax): Exercise-89 with Solution

Negate Predicate Function

Write a JavaScript program to negates a predicate function.

Note: Take a predicate function and apply the not operator (!) to it with its arguments.

• Take a predicate function and apply the not operator (!) to it with its arguments.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2
// Define the function 'negate' to negate the result of a given function.
const negate = func => (...args) => !func(...args);

// Example usage:
console.log([1, 2, 3, 4, 5, 6].filter(negate(n => n % 2 === 0)));
// Outputs: [1, 3, 5] (filtering out the even numbers)

Output:

[1,3,5]

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-89-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that takes a predicate function and returns a new function that negates its result.
• Write a JavaScript function that accepts a callback and returns its logical inverse when applied to any argument.
• Write a JavaScript program that demonstrates function negation by applying the resulting function to a set of test cases.

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