A quick look at javascript spread operator in ecma6

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Javascript spread operator which has been introduced in ecma6 allows us to expand an expression in place easily. If we want to expand two arrays inside a new array then we can first create that two arrays like so…

const a = [1, 2, 3]
const b = [4, 5, 6]

Next we can expand the elements of the above arrays in a new array like this…

const c = [...a,...b]

which will result in a new array like this

const c = [1,2,3,4,5,6]

This is very easy as compared to previously which we need to use various insert methods to create a new array which consists of two arrays above.


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