filter return true or false

Question

I'm using filter to find id in data.it return object not true or false.

How can I return true or false if val.recoredId === valueId ?

var hasMatch = data.filter(function (val) {
  return (val.recordId === valueId);
});
        

Answer 1

Just check the length of filtered results.

var hasMatch = data.filter(function (val) {
  return (val.recordId === valueId);
}).length > 0;

Answer 2

使用查找

 hasMatch = data.find(function (value) {return value.recordId == valueId });

Answer 3

While calling filter with length appended does resolve this, I would point you to the some() method

hasMatch = data.some(function (value) {
   return value.recordId == valueId
});

This will return a boolean if the array contains any matching value.recordId == valueId entries

Answer 4

try this

var hasMatch = data.filter(function (val) {
    return !!(val.recordId === valueId);                               
});