count an array code example

Example 1: get array length using php

// using count() we can get proper length of the array
$names = array("Ankur","Raj","Ram","Suresh");
// pass array into count() as parameter it will return array length
echo count($names);

// output : 4

Example 2: Count elements in an array

//#Source https://bit.ly/2neWfJ2 
const countOccurrences = (arr, val) => arr.reduce((a, v) => (v === val ? a + 1 : a), 0);
console.log(countOccurrences([1, 1, 2, 1, 2, 3], 1));
console.log(countOccurrences([1, 1, 2, 1, 2, 3], 2));
console.log(countOccurrences([1, 1, 2, 1, 2, 3], 3));