js count array code example
Example 1: array length javascript
var arr = [10,20,30,40,50];
var len= arr.length;
console.log(len);
console.log(arr.length);
Example 2: javascript size array
let array = [1, 2, 3];
console.log(array.length);
Example 3: array length in js'
var x = [];
console.log(x.size());
console.log(x.length);
console.log(x.size()==x.length);
x =[1,2,3];
console.log(x.size());
console.log(x.length);
console.log(x.size()==x.length);
Example 4: 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)