4 ms·

it is called setDate , i know, a bit confusing haha var today = new Date() // today is 19/09/2016 console.log(today.getDate()) // will print 19 today.setDate

by nicomfe 10y ago

it is called setDate , i know, a bit confusing haha var today = new Date() // today is 19/09/2016 console.log(today.getDate()) // will print 19 today.setDate(20) console.log(today.getDate()) // will print 20

saghm 10y ago
But `getDate` is separate from `getDay`, so why isn't there a `setDay` as well as a `setDate`?
- nicomfe 10y ago
  getDay returns the index of the week day your date is getDate returns the day number within the month so for 19/09/2016 getDay returns 1 (Sunday=0, Monday=1, ....) getDate returns 19
  - saghm 10y ago
    So why not have a method that sets the day of the week as well? It just seems odd to me that they would implement setters for all of the other time units but not this one
    - CyberFonic 10y ago
      See my comment above. What interpretation would you prefer? setDay changes the date into the future or past by changing the date, the month or the year. At a minimum there are 6 possible values. To me none of them are an obvious choice.
      - saghm 10y ago
        Given that `setMinute` sets the minute in the same hour and `setHour` sets the hour in the same day, I'd think `setDay` setting to the day in the same week would be rather logical
    - nicomfe 10y ago
      cause if you have the date 19/09/2016 whats the point of setting the day of the week? so do you wanna set the date to be Thursday but still keep the 19/09/2016 that wouldnt make any sense, cause 19/09/2016 is Monday, and in all cases must be Monday.
      - saghm 10y ago
        What if I wanted to get the day at the beginning of the week that a date occurred in? For instance, if you had a payroll system where you paid hourly workers weekly, it would be useful to be able to bucket the hours worked on the day that the paycheck is sent
CyberFonic 10y ago
console.log(today.getDay()) // prints 1 assuming there was a setDay, and you invoke: today.setDay(3) should today now be: 21/9/2016 or 14/9/2016 or 19/10/2016 or 19/9/2040 or ... ? I think you can see that unlike the other setters, setDay would not have an "obvious" implementation.

by nicomfe 10y ago

saghm 10y ago

But `getDate` is separate from `getDay`, so why isn't there a `setDay` as well as a `setDate`?

nicomfe 10y ago
getDay returns the index of the week day your date is getDate returns the day number within the month so for 19/09/2016 getDay returns 1 (Sunday=0, Monday=1, ....) getDate returns 19
- saghm 10y ago
  So why not have a method that sets the day of the week as well? It just seems odd to me that they would implement setters for all of the other time units but not this one
  - CyberFonic 10y ago
    See my comment above. What interpretation would you prefer? setDay changes the date into the future or past by changing the date, the month or the year. At a minimum there are 6 possible values. To me none of them are an obvious choice.
    - saghm 10y ago
      Given that `setMinute` sets the minute in the same hour and `setHour` sets the hour in the same day, I'd think `setDay` setting to the day in the same week would be rather logical
  - nicomfe 10y ago
    cause if you have the date 19/09/2016 whats the point of setting the day of the week? so do you wanna set the date to be Thursday but still keep the 19/09/2016 that wouldnt make any sense, cause 19/09/2016 is Monday, and in all cases must be Monday.
    - saghm 10y ago
      What if I wanted to get the day at the beginning of the week that a date occurred in? For instance, if you had a payroll system where you paid hourly workers weekly, it would be useful to be able to bucket the hours worked on the day that the paycheck is sent

CyberFonic 10y ago

console.log(today.getDay()) // prints 1 assuming there was a setDay, and you invoke: today.setDay(3) should today now be: 21/9/2016 or 14/9/2016 or 19/10/2016 or 19/9/2040 or ... ? I think you can see that unlike the other setters, setDay would not have an "obvious" implementation.