Question

I have the following function:

function isBigEnough(element, index, array) {
  return (element >= 10);
}
var filtered = [12, 5, 8, 130, 44].filter(isBigEnough);
// filtered is [12, 130, 44] 

How can I return values that are larger than (or equal to) a number other than 10? For example, array.filter(isBigEnough(15)) would give me 44, 130

Answer 1

Functions are first-class citizens in JS, so you can create a function which returns another function:

function isBigEnough(value) {
  return function(element, index, array) {
    return (element >= value);
  }
}
var filtered = [12, 5, 8, 130, 44].filter(isBigEnough(10));