const z = [
[
"Almond",
54
],
[
"Oats",
75
],
[
"Raisins",
undefined
]
]
let temp=[];
z.map((item, index) => {
temp.push(item);
if (item[item.length - 1] === undefined) {
temp[index][1] = 'Not available'
}
});
console.log(temp)
console.log(z);
I'm changing the undefined entry to 'Not available' by creating another array.
I'm not able to understand my z array is changing along with temp.
A better approach would be to return a result array, mapping each entry in the item array to 'Not available' if it is undefined and then last entry in the item array.
This will leave the original z array untouched.
const z = [ [ "Almond", 54 ], [ "Oats", 75 ], [ "Raisins", undefined ] ]
let result = z.map((item, index) => {
return item.map((val, idx) => {
let notAvailable = (val === undefined) && (idx === item.length -1);
return notAvailable ? 'Not available': val;
})
})
console.log('z:', z);
console.log('Result:', result).as-console-wrapper { max-height: 100% !important; }