use .map to count length of each element in an array use .map to count length of each element in an array typescript count array condition
The solution for “use .map to count length of each element in an array use .map to count length of each element in an array typescript count array condition” can be found here. The following code will assist you in solving the problem.
var lengths = chars.map(function(word){
return word.length
}) var words = [‘Hello’, ‘world’];
var lengths = words.map(function(word) {
return word + ‘ = ‘ + word.length;
});
console.log(lengths);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)
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