Junior — Senior
Research on the behavior of main array and object methods in JavaScript
livecode
Task condition
Replace the question marks with appropriate arguments or functions and specify what each call will return:
[1, 2, 3].map(?) // ?
[1, 2, 3].filter(?) // ?
[1, 2, 3].some(?) // ?
[1, 2, 3].every(?) // ?
[1, 2, 3].includes(?) // ?
[1, 2, 3].unshift(?) // ?
[1, 2, 3].slice(?) // ?
[1, 2, 3].splice(?) // ?
Object.create(?) // ?
Object.assign(?) // ?
Object.prototype.hasOwnProperty(?) // ?