w3 filter javascript code example

Example 1: how the filter() function works javascript

const arr = [1, 2, 3, 4, 5, 6, 7, 8, 9];

const filter = arr.filter((number) => number > 5);
console.log(filter); // [6, 7, 8, 9]

Example 2: filter in js

const filterThisArray = ["a","b","c","d","e"] 
console.log(filterThisArray) // Array(5) [ "a","b","c","d","e" ]

const filteredThatArray = filterThisArray.filter((item) => item!=="e")
console.log(filteredThatArray) // Array(4) [ "a","b","c","d" ]

Example 3: filter javascript

function filter(array, filterfunc) {

  let filteredArray = [];
  for (let i = 0; i < array.length; i++) {
    let result = filterfunc(array[i], i, array);
    if (result) {
      filteredArray.push(array[i]);
    }
  }
  return filteredArray;
};