As I continue to practice my coding skills, despite still being relatively new, I often come across this type of code in loops when searching for solutions to practice problems. I am intrigued by what exactly this particular line of code is accomplishing.
counter[string[i]] = (counter[string[i]] || 0) + 1;
Furthermore, here is the full code snippet that is utilized to determine the most frequently occurring character within a given string.
var string = "355385",
counter = {};
for (var i = 0, len = string.length; i < len; i += 1) {
counter[string[i]] = (counter[string[i]] || 0) + 1;
}
var biggest = -1, number;
for (var key in counter) {
if (counter[key] > biggest) {
biggest = counter[key];
number = key;
}
}
console.log(number);