I have 2 date pickers. One is for selecting a start date and the other is for selecting an expiry date. When a selection has been made I convert the date to string format and store the results in a two text fields.
This is how I save to the database:
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MMMM d" // e.g. September 15
let sDate = dateFormatter.dateFromString(startDateField.text) as NSDate!
let eDate = dateFormatter.dateFromString(expiryDateField.text) as NSDate!
activity["startDate"] = sDate
activity["expiryDate"] = eDate
activity.saveInBackgroundWithBlock({ (success: Bool, error: NSError!) -> Void in
What I intend to do is have a table view display 2 sections: one showing activities that are active, and the other showing activities that are expired/not in date range.
I figured I could do this by taking the current date and checking it was within the start date and expiry date range.
My saved date from above is showing up in parse like this:
The thing is, I don't want to take the year or time into account. The only thing that matters is the month and day. So for example an activity could run once a year between September 15th and December 20th.
I need a way to check that the current date is within those two dates taking the day (e.g. 15th) of the month into account. So today's date is October 19 and an activity would be in range if its start date was September 15 and its expiry date December 20, but would be out of range/operation if the expiry date was October 18 or start date was October 25.
So to summarise:
I will be displaying two sections in a table view. One with active activities and another with non-active out of operation activities.
How do take my stored start date and expiry date and easily check the current date is within their range?
For the occasions when users pick either a start date or expiry date I need to check if the current date is greater/less than the start date (to be able to decide if the activity should show up or not) or if the current date is greater/less than the expiry date (to be able to decide if the activity has passed or not passed its expiry date.
It would be nice if I could roll 1 and 2 into one function and use it in the table view.
Would be interested to learn how the more experienced programmer would achieve this.
Instead of the date format "MMMM d" (e.g. "September 15"), you can convert the dates
to a string with the date format "MMdd" (e.g. "0915"). Then you can do a simple
string comparison between the current date, the start date and the expiry date.
For example,
"0915" < "1019" < "1220"
so October 19 is in the range from September 15 to December 20.
Related
I am using DatePicker and I want to set a calendar date based on other calendar field, if the date of first calendar falls in current month then the date of second calendar should be valid from the date of first calendar (for eg: 1st calendar date is set to 20-06-2021 which is of current month then the second calendar date should allow to add date from 20-06-2021), if the date of first calendar falls in last month then the date of second calendar should be valid from the start date of this month (for eg: 1st calendar is set to 20-05-2021 which is of last month then the second calendar date should allow to add date from 01-06-2021), please give me a solution on how I can resolve this issue.
You can do it by using state suppose you have started your first date picker from 2021-06-20
this.state = {date:"2021-06-20"}
and then when the user changes the date you update your state by
onDateChange={(date) => {this.setState({date: date})}}
now by using this updated state you can start your second date picker by using the current state.
And by assigning it to a variable you can apply any conditional statements that you want.
So I have an object (Activity) where I allow users to select start date and an expiry date for an activity.
The user is basically a center/centre that provides activities for the public.
They have the option of making these activities seasonal. So for example an activity could run from Feb 01 to June 22. I use the current date along with a bunch of code to determine if the activity is in season or not.
So for example I check if the current date 271014 is greater than the start date 020114 and less than the expiry date 062214. If it is then it means the date is in range.
The issue:
I've had to make changes, so now the user must select a month and day only. This is fine until they select something like Nov 01 to Feb 28.
These dates would be in the format 1101 and 2802.
Without the year this obviously gives me different results. With the year I would have been able to determine that the expiry date Feb 28 was the year after the start date and not the same year. Then when working out if the current date was within the start date and expiry date I'd get expected results. Without the year the expiry date is now actually not greater than the start date even though it should be.
What I'm currently doing
How do I solve this issue? All I really need is to allow a user to set a start date and an expiry. The activity will show up in a table view only when the current date is in range.
If only an expiry date is selected then the activity will remain active until that expiry date has been reached. Even if I set and expiry date for Feb 28 and we're in November. The same need applies to the start date too.
Would appreciate some insight here.
Thanks for your time.
Here my suggestion (in pseudo-code): Convert all dates to strings in the format "MMdd", in
your example
startDate = "1101" // November 1
expiryDate = "0228" // February 28
currentDate = "1027" // October 27
If startDate <= expiryDate then the range is within the same year and you can check
the current date with
if (startDate <= currentDate && currentDate <= expiryDate) ...
Otherwise the range starts in one year and ends in the next year, and you check with
if (currentDate >= startDate || currentDate <= expiryDate) ...
I have a yearly chart that it broken down into the 12 months Jan - Dec. The report contains various parameters including a yearly dropdown that changes the chart and report.
This all works fine within the first report.
The problem is that I have set up an action on the chart to go to a second report with a monthly breakdown, so my question is how can I pass the monthly value from the first report to the second?
The monthly report has an additional date from and date to parameter, so for the month of January it would need the values: Date From: 01/01/2010 and Date To: 31/01/2010 for example.
Thanks in advance.
Since you have the year and month integer values, you can construct the start and end dates to pass to your other report using expressions.
The start of the month will be:
=DateSerial(Fields!Year.Value, Fields!Month.Value, 1)
Where Year and Month are the integer values from the Chart/Dataset.
The end date is a bit more complicated; since the day part can be 30/31, etc, but we can just add one month to the above expression to get the first of the next month, then go back a day:
=DateAdd(DateInterval.Day
, -1
, DateAdd(DateInterval.Month, 1, DateSerial(Fields!Year.Value, Fields!Month.Value, 1)))
This way your drillthrough report can get its date based parameters and you don't need any changes to your dataset/parent report.
I just don't know how to go about this.
I designed a program that uses MS Access as its database. I have a field for month and year (the field data type is text) where user can register details. The program will register the month and year the user have chosen e.g month= September, year=2011.
My problem now is how to chose a range of data to view by the user using the month and year as a criteria e.g the User may want to view data range from (September 2011 to July 2013).
I couldn't figure out even how to try. Help will be highly appreciated.
Perhaps you could change your application logic to store the month and year as their respective numbers rather than text and change the field data types to numeric.
You could then construct a DateTime object from them, for example September would be 9 and you could use code like the following:
var startDate = new DateTime(year, month, 1); // get year and month as integers from database, uses the first as the date
var endDate = new DateTime(year, month, 10); // change the date but keeps the month and year the same
var endDate2 = startDate.AddMonths(1); // adds 1 month to the date
Alternatively, you could try using a calendar control to allow the user to select two dates instead of building it from a number of fields. Depending on what you are using this could be achieved a number of ways, for example in ASP.Net or WPF you could use two calendar controls and just use their SelectedDate properties as your range.
A range is from a startpoint until an end point. For the startpoint you can add automatically the first of Month. For the endpoint is it more complicated because there is no fix endpoint. What you can do is following:
Write an array that contains for each month the days (e.g. 30 or 31). Except for Febrauary there is a fix pattern.
for Febrauary use the selected year to check is the year a leap year or not. If not add 28, else add 29.
After that create the date string for your SQL:
Startdate 1.9.2011. Do for the entdate the same.
After that, I think you can use the keyword between in your SQL query.
You can assume that everything is entered on the first day of each month. I would pull the information using a query to the database.
select * from [tablename] where DateSerial([colYear], [colMonth], 1) between DateSerial([fromYear], [fromMonth], 1) and DateSerial([toYear], [toMonth], 1)
In this question are some ways to do this:
First. Filter the dates in a range assuming that you use a date like '07-12-2012'
i.e. September 2011 to July 2013
Where DateColumn > '09-01-2011' and DateColumn < '07-31-2013'
OR
Specify a Date and a Year
Where month(DateColumn)='1' and year(DateColumn)='2016'
Note:
There are many ways to do this.
You can Manipulate your statement depending on your desired output.
I need to run a report grouped by week. This could be done by using group by week(date) but the client wants to set the day of the week that marks the end of week. So it can be Tuesday, Wednesday etc. How can I work this into a group by query?
The datetime column type is unix timestamp.
The WEEK() function takes an optional second parameter to specify the start of the week:
This function returns the week number for date. The two-argument form of WEEK() enables you to specify whether the week starts on Sunday or Monday and whether the return value should be in the range from 0 to 53 or from 1 to 53.
However, it can only be set to Sunday or Monday.
UPDATE: Further to the comments below, you may want to consider adding a new column to your table to act as a grouping field, based on WEEK(DATE_ADD(date INTERVAL x DAY)), as suggested in the comments. You may want to create triggers to automatically generate this values whenever the date field is updated, and when new rows are inserted. You would then be able to create a usable index on this new field as required.