Answers for "how to count items in array javascript"

PHP
30

array count items

<?php
	$arr = ["one", "two", "three", "four"];
	echo count($arr);
  ?>
Posted by: Guest on December-29-2019
0

use .map to count length of each element in an array

var lengths = chars.map(function(word){
 return word.length
})
Posted by: Guest on July-10-2020
-2

typescript count array condition

let data = [ { "id": 1, "is_read": true, }, { "id": 2, "is_read": true, }, { "id": 3, "is_read": false, }, { "id": 4, "is_read": true, }, ],
length = data.filter(function(item){
  return item.is_read;
}).length;
console.log(length)
Posted by: Guest on October-23-2020

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