Is there a built-in method in JavaScript to convert an array like:
const colorArray = ['red', 'green', 'green', 'blue', 'purple', 'red', 'red', 'black'];
into an object that counts the occurrences of each element, like this:
Object {
"red": 3,
"green": 2,
"blue": 1,
"purple": 1,
"black": 1
}
I attempted to create a custom solution with a function, but I am wondering if there is a native method available for this purpose. Any insights would be greatly appreciated!
Array.prototype.reduce() appears to be the solution you've been searching for:
const colors = ['red', 'green', 'green', 'blue', 'purple', 'red', 'red', 'black'],
results = colors.reduce((acc,color) => (acc[color]=(acc[color]||0)+1, acc), {})
console.log(results).as-console-wrapper{min-height:100%;}Utilize the .reduce method:
const colors = ['red', 'green', 'green', 'blue', 'purple', 'red', 'red', 'black'];
let colorFrequency = colors.reduce((acc, curr) => ({ ...acc, [curr]: acc[curr] + 1 || 1}), {} );
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