Javascript json array filter with date

Question

JSON response from the server and I need to filter with the date(year) before to show client-side

example

person = [{ name: String, birth: Date }]



function fltr(name, year){
   return person.filter(res => ( res.name == name && res.birth.getFullYear() === year) )
}

fltr('jon', 1990 );

added getFullYear() in condition res.birth.getFullYear() to match with year but not working , Please correct me

Please

Please share the error you are getting as well as the input and expected output. — Hassan Imam
– Hassan Imam, Commented Jun 26, 2019 at 11:34
You say you get json from the server -- JSON cannot encode dates, so you have to manually iterate over your person array and change the date strings into javascript date objects. Have you done this already? — TKoL
– TKoL, Commented Jun 26, 2019 at 11:37
I doubt that a JSON response contains Date object? It could be a string! See if you are overlooking it — Prasanna
– Prasanna, Commented Jun 26, 2019 at 11:37

Rafael Herscovici · Accepted Answer · 2019-06-26 11:38:25Z

2

i would guess your date format is wrong, since the following works pretty well:

const people = [{ name: 'Kaiser Soze', birthDate: '1995/06/20' }];
const filterByNameAndBirthYear = (name, year) => {
  return people.filter(person => person.name === name && new Date(person.birthDate).getFullYear() === year);
}
let result = filterByNameAndBirthYear('Kaiser Soze', 1995);
console.log(result);

answered Jun 26, 2019 at 11:38

Rafael Herscovici

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7 Comments

str Over a year ago

You are using non-standard date formats. Please read What are valid Date Time Strings in JavaScript?. For example, new Date('1995/06/20') is not the same as new Date('1995-06-20').

Rafael Herscovici Over a year ago

@str developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…

ShibinRagh Over a year ago

What is the syntax for adding standard Date format in Mongoose Schema?

Rafael Herscovici Over a year ago

@ShibinRagh stackoverflow.com/questions/7443142/…

str Over a year ago

@Dementic What is your point? 1995/06/20 is not a valid date format according to the specification.

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