Finding the max value of an attribute in an array of objects

Question

I\'m looking for a really quick, clean and efficient way to get the max \"y\" value in the following JSON slice:

[
  {
    \"x\": \"8/11/2009\",
    \"y\": 0         


        

Answer 1

clean and simple ES6 (Babel)

const maxValueOfY = Math.max(...arrayToSearchIn.map(o => o.y), 0);

The second parameter should ensure a default value if arrayToSearchIn is empty.