Javascript Practice 52: JS Hero - Set array elements

 

Question: 

Write a function setFirstElement that takes an array and an arbitrary variable. The variable should be inserted as the first element in the array. The array should be returned.

Example: setFirstElement([1, 2], 3) should return [3, 2].

Answer: 

function setFirstElement (array, v1) {

array[0] = v1; 

return array

}

> declare a function setFirstElement 

> it has 2 parameters array & v1

> we set the first element of the array to the v1 parameter

> like this: array[0] = v1

> we return the array

> we learnt how to get the element of an array in the last exercise

> and now we learnt how to set an element in this exercise