Javascript:Array Slice

 

slice do not alter original array,array's some part is copied to destination copying is shallow

let languages = ["java","javascript","Go",{node:"javascript"}]

let firstLanguage = languages.slice(3,4)

firstLanguage[0]["node"] = "python" //this value being object is shallow copied hence changes witll in parent also

console.log(languages)

console.log(firstLanguage)

Output:

[ 'java', 'javascript', 'Go', { node: 'python' } ]

[ { node: 'python' } ]

primitive types are copies by value