js make letter in array uppercase code example
Example 1: convert an array to uppercase or lowercase js
var fruits = ["Banana", "Orange", "Apple", "Mango"];
undefined
string = fruits.join(' ').toUpperCase();
// Output"BANANA ORANGE APPLE MANGO"
Example 2: how to convert array to uppercase in javascript
var a = ['this','is','test'];
a.map(f=>{ return f.toUpperCase(); });