I am trying to get the first and last item in array and display them in an object.
What i did is that I use the first and last function and then assign the first ite
With ES6 and destructuring:
const myArray = ['Rodel', 'Mike', 'Ronnie', 'Betus'];
const { 0: first, length, [length -1]: last } = myArray //getting first and last el from array
const obj = { first, last }
console.log(obj) // { first: "Rodel", last: "Betus" }
ES6
var objOutput = { [myArray[0]]: [...myArray].pop() }
var myArray = ['Rodel', 'Mike', 'Ronnie', 'Betus'];
var objOutput = { [myArray[0]]: [...myArray].pop() }
console.log(objOutput);
I've modified your code :
var myArray = ['Rodel', 'Mike', 'Ronnie', 'Betus'];
function firstAndLast(array) {
var firstItem = myArray[0];
var lastItem = myArray[myArray.length-1];
var objOutput = {
first : firstItem,
last : lastItem
};
return objOutput;
}
var display = firstAndLast(myArray);
console.log(display);
UPDATE: New Modification
var myArray = ['Rodel', 'Mike', 'Ronnie', 'Betus'];
function firstAndLast(array) {
var firstItem = myArray[0];
var lastItem = myArray[myArray.length-1];
var objOutput = {};
objOutput[firstItem]=lastItem
return objOutput;
}
var display = firstAndLast(myArray);
console.log(display);
Do like this :-
var myArray = ['Rodel', 'Mike', 'Ronnie', 'Betus'];
function firstAndLast(myArr) {
var firstItem = myArr[0];
var lastItem = myArr[myArr.length - 1];
var objOutput = {};
objOutput[firstItem] = lastItem;
return objOutput;
}
var display = firstAndLast(myArray);
console.log(display);
well, I have another idea... for ex.:
const all = ['food', 'clean', 'cat', 'shower', 'work out']
console.log(`you have ${all.length} all!`)
console.log(`Todo: ${all[0]}`)
console.log(`Todo: ${all[all.length - 1]}`)
To make your first
and last
properties work as you want, define them as properties with "getters" on the array prototype.
(You also have an inconsistency between firstAndLastArray
and transformFirstAndLast
, which needed to be fixed.)
Returning {firstName: lastName}
will not do what you presumably want, since it will yield the key firstName
. To use the actual first name as the key, use computed property names ({[firstName]: lastName}
).
Object.defineProperties(Array.prototype, {
first: { get() { return this[0]; }},
last: { get() { return this[this.length - 1]; }}
});
var myArray = ['Rodel', 'Mike', 'Ronnie', 'Betus'];
function firstAndLast(array) {
var firstItem = myArray.first;
var lastItem = myArray.last;
return {[firstItem]: lastItem};
}
var display = firstAndLast(myArray);
console.log(display);
Or, much more simply, just
function firstAndLast(array) {
return {[array[0]]: array[array.length - 1]};
}
If you don't want to, or cannot, use computed property names, then
function firstAndLast(array) {
var result = {};
result[array[0]] = array[array.length - 1];
return result;
}