What I expect: the 'for loop' brings the number of columns that will be displayed in the table, the start date, and the end date are taken by an object. the transaction date is taken by a different object. The start date variable gets the exception and the transaction date gets the value without a problem.
Code:
if(date >0){//no of dates for the selected week
for (i in 0 until date) {
val dateFormat = SimpleDateFormat("yyyy-MM-dd")
val tv_Date = TextView(this)
val transDate = SortedDateHashMap[i].transactionDate
val start = SortedExpenseDateHashMap[i]!!.weekStart
val end = SortedExpenseDateHashMap[i]!!.weekEnd
val startDate = dateFormat.parse(start)
val endDate = dateFormat.parse(end)
var transactionDat = dateFormat.parse(transDate)
if(transactionDat.before(endDate) && transactionDat.after(startDate)){
setColor(tv_Date)
tv_Date.setPadding(10, 15, 10, 10)
tv_Date.gravity = Gravity.CENTER
tv_Date.layoutParams = params3
tv_Date.text = SortedDateHashMap[i].transactionDate
}
}
}
Used null safe and wrote the code in the try..catch exception. Worked
I have a Date Range Picker(Material Design) and I want to disable previous dates(so minimum date will be current day), and maximum date will be 6 months later. I tried something like this:
val calendar = Calendar.getInstance()
val constraintsBuilderRange = CalendarConstraints.Builder()
val dateValidatorMin: CalendarConstraints.DateValidator = DateValidatorPointForward.from(calendar.timeInMillis)
val dateValidatorMax: CalendarConstraints.DateValidator = DateValidatorPointBackward.before(calendar.timeInMillis+100000000)
val listValidators = ArrayList<CalendarConstraints.DateValidator>()
listValidators.add(dateValidatorMin)
listValidators.add(dateValidatorMax)
val validators = CompositeDateValidator.allOf(listValidators)
constraintsBuilderRange.setValidator(validators)
val datePicker = MaterialDatePicker.Builder.dateRangePicker()
.setTitleText("Select range")
.setCalendarConstraints(constraintsBuilderRange.build())
.build()
datePicker.show(
this.requireFragmentManager(),"date_range_picker"
)
This worked but I randomly give 100000000 to dateValidatorMax. So how can I achieve 6 months later in milliseconds? And how can I get 1 day before currentDate in dateValidatorMin?
So I solved this problem thanks to Kotlin, there is a really easy method:
val dateValidatorMin: CalendarConstraints.DateValidator = DateValidatorPointForward.from(calendar.timeInMillis - 1.days.toLong(
DurationUnit.MILLISECONDS))
val dateValidatorMax: CalendarConstraints.DateValidator = DateValidatorPointBackward.before(calendar.timeInMillis+ 180.days.toLong(
DurationUnit.MILLISECONDS))
I had a similar problem where I needed only dates in the range from the previous day to 45 days behind the current date to be enabled. That is, today, January 18th, the calendar would only be enabled from 12-05-2022 to 01-17-2023.
I did it like this:
val dateValidatorMin: DateValidator =
DateValidatorPointForward.from(
Calendar.getInstance().timeInMillis - 45.days.toLong(DurationUnit.MILLISECONDS))
val dateValidatorMax: DateValidator =
DateValidatorPointBackward.before(
Calendar.getInstance().timeInMillis - 1.days.toLong(DurationUnit.MILLISECONDS))
val dateValidator: DateValidator = CompositeDateValidator.allOf(listOf(dateValidatorMin, dateValidatorMax))
val constraints: CalendarConstraints =
CalendarConstraints.Builder()
.setValidator(dateValidator)
.build()
val builder = MaterialDatePicker.Builder.dateRangePicker()
.setCalendarConstraints(constraints)
.setTitleText(getString(R.string.label_select_date_range))
val picker = builder.build()
And the result was like this:
Hope this helps.
I have a data class as below in Kotlin.
data class ProductData(
val code: String,
var value: Double)
There are two list for the above data class as
lstToday: List<ProductData> contains such as
("P1", 110)
("P2", 109)
("P3", 102)
("P4", 110)
..... 100+ records
and
lstYesterday: List<ProductData> contains such as
("P1", 112)
("P2", 109)
("P3", 110)
("P4", 90)
..... 100+ records
Both has the identical and exact number of records.
The output I am looking for is as below.
Output 1: Difference between yesterday and today
lstDifference: List<ProductData> contains such as
("P1", -2)
("P2", 0)
("P3", 8)
("P4", -20)
..... 100+ records
Output 2: Today Price and Difference between yesterday and today
using the data class below.
data class ProductDisplayData(
val code: String,
var value: Double,
var diff: Double
)
With list as below
lstDifference: List<ProductData> contains such as
("P1", 112, -2)
("P2", 109, 0)
("P3", 110, 8)
("P4", 90, -20)
..... 100+ records
Can this be achieved using any functions Kotlin, or is it we have loop each element and get the result.
Thanks
I would say this is not the most efficient solution. We're talking 0n ish. This could definitely be optimized. To note, this is fault tolerant of the code itself not being included in both days, and assumes 0 for a non-existent value between days.
Trying to guarantee that both data sets will always be the same, is going to be more maintenance than writing code that will tolerate that mistake.
data class ProductData(
val code: String,
var value: Double
)
val dayOne = listOf(
ProductData("P1", 110.0),
ProductData("P2", 109.0),
ProductData("P3", 102.0),
ProductData("P4", 110.0),
ProductData("P5", 105.0),
ProductData("P6", 104.0),
ProductData("P8", 32.0) // Not in set 2
)
val dayTwo = listOf(
ProductData("P1", 110.0),
ProductData("P2", 109.0),
ProductData("P3", 102.0),
ProductData("P4", 90.0),
ProductData("P5", 49.0),
ProductData("P6", 123.0),
ProductData("P7", 239.0) // Not in set 1
)
fun periodDataDifference(dayOne: List<ProductData>, dayTwo: List<ProductData>): List<ProductData> {
val mapOne = dayOne.associate { it.code to it.value }
val mapTwo = dayTwo.associate { it.code to it.value }
val keys = mapOne.keys + mapTwo.keys
return keys.map { key ->
val first = mapOne[key] ?: 0.0
val second = mapTwo[key] ?: 0.0
ProductData(key, second - first)
}
}
val out = periodDataDifference(dayOne, dayTwo)
println(out)
/*
[ProductData(code=P1, value=0.0),
ProductData(code=P2, value=0.0),
ProductData(code=P3, value=0.0),
ProductData(code=P4, value=-20.0),
ProductData(code=P5, value=-56.0),
ProductData(code=P6, value=19.0),
ProductData(code=P8, value=-32.0), // Set 1 only
ProductData(code=P7, value=239.0)] // Set 2 only
*/
If today and yesterday lists are gonna be same size this is the quickest solution I have
val lstYesterday: List<ProductData> = listOf(
ProductData("P1", 112.0),
ProductData("P2", 109.0),
ProductData("P3", 110.0)
)
val lstToday: List<ProductData> = listOf(
ProductData("P1", 110.0),
ProductData("P2", 109.0),
ProductData("P3", 102.0)
)
val lstDifference: MutableList<ProductData> = mutableListOf()
for ((index,j) in lstToday.withIndex()){
val code = lstToday[index].code
val value = lstToday[index].value-lstYesterday[index].value
lstDifference.add(ProductData(code,value))
}
I need to convert LocalDateTime to Date object in angular 5
How can I do that?
The date is in this format [2018,1,25,0,0]
If the date you are being provided is [ 2016, 1, 5, 0, 0 ] this is an array, so we can pull each item out and place it into the new Date() method.
See example below:-
d = [ 2016, 1, 5, 0, 0 ];
endDate = new Date(d[0], d[1] - 1, d[2])
console.log(endDate);
I am also guessing that the 1 is January, if not, please remove the - 1 inside the new Date() method.
So your code will look like:-
let data = {
endDate: [2016, 1, 5, 0, 0]
}
data['endDate'] = new Date(data['endDate'][0], data['endDate'][1] - 1, data['endDate'][2])
console.log(data)
new Date(LocalDateTime)
where LocalDateTime is your local date time
How can I get the time from a json where I have values like:
"time": ["1507457400000", "1507458600000"] //Strings
In Javascript I could do something like
new Date(1507457400000) // return Sun Oct 08 2017 12:10:00 GMT+0200
new Date(1507457400000).getHours() // return 12
new Date(1507457400000).getMinutes() // return 10
But I have no idea how to get the time using kotlin. Any idea what is the best way to get the time from the data I have?
val date = SimpleDateFormat("HH:mm").format(Date((1507457400000 / 1000)))
Use this:
val calendar = Calendar.getInstance()
calendar.timeInMillis = 1507457400000
val date = calendar.time
if you have the millisecond in a string like str:
val calendar = Calendar.getInstance()
calendar.timeInMillis = str.toLong()
val date = calendar.time
for hour and min:
val h = calendar.get(Calendar.HOUR_OF_DAY)
val m = calendar.get(Calendar.MINUTE)
val result = h.toString() + ":" + m.toString()