Android Question FindNextTime with dynamic list values

andyr00d · Jul 3, 2019

Hello,

I am wanting to use the FindNextTime sub mentioned here to pass in values from a list as the parameter (rather than hardcoded values). I tried to give it a string but it won't accept it, how should I do it?

B4X:

Dim strTimes As String
strTimes = 12+01/60
Dim strTimes2 As String
strTimes2 = 17+12/60
Dim strFinal As String = strTimes & "," & strTimes2
Dim t As Long = FindNextTime(strFinal)

And I'm getting:
java.lang.NumberFormatException: For input string: "12.016666666666667,17.2"

emexes · Jul 3, 2019

Well, for a start you need to pass the times as a list/array, rather combined together into one string.

Using the example at the top of the post you referred to:

B4X:

Dim t As Long = FindNextTime(Array As Double(5, 6.5, 20))

you should try using:

B4X:

Dim t As Long = FindNextTime(Array As Double(strTimes, strTimes2))

as your last line, where the items strTimes and strTimes2 will be automatically cast from Strings to Doubles.

DonManfred · Jul 3, 2019

andyr00d said:
strTimes = 12+01/60

Looks like an mistake. Instead of setting a string you are doing some math here

andyr00d · Jul 3, 2019

emexes said:
Well, for a start you need to pass the times as a list/array, rather combined together into one string.

Using the example at the top of the post you referred to:

B4X:

Dim t As Long = FindNextTime(Array As Double(5, 6.5, 20))

you should try using:

B4X:

Dim t As Long = FindNextTime(Array As Double(strTimes, strTimes2))

as your last line, where the items strTimes and strTimes2 will be automatically cast from Strings to Doubles.

Thanks, but what about a case where the number of parameters (strTimesX) is unknown? I can't see a way to do a loop and build up a variable to pass through?

emexes · Jul 3, 2019

andyr00d said:
I am wanting to use the FindNextTime sub mentioned here to pass in values from a list as the parameter

Today is your lucky day, because a list of time values is precisely what:

B4X:

Sub FindNextTime(Times As List) As Long

is expecting! You can either construct a variable (list/array) to pass to it, or you can construct it inline with Array().

emexes · Jul 3, 2019

andyr00d said:
build up a variable to pass through?

Bear in mind that you can pass either a list or an array to the function.

An array cannot be extended once Dimmed, so here you'd be better using a list.

B4X:

Dim TimeList As List
TimeList.Initialize

Dim ClassStartTime as Double
For ClassStartTime = 9 to 15+21/60 Step 55/60    'test data = school class start times every 55 minutes from 9am to 3:21pm
    TimeList.Add(ClassStartTime)
Next

Log(TimeList)    'so we can see what's going on

Dim t As Long = FindNextTime(TimeList)

andyr00d · Jul 3, 2019

emexes said:
Bear in mind that you can pass either a list or an array to the function.

An array cannot be extended once Dimmed, so here you'd be better using a list.

B4X:

Dim TimeList As List TimeList.Initialize Dim ClassStartTime as Double For ClassStartTime = 9 to 15+21/60 Step 55/60 'test data = school class start times every 55 minutes from 9am to 3:21pm TimeList.Add(ClassStartTime) Next Log(TimeList) 'so we can see what's going on Dim t As Long = FindNextTime(TimeList)

That is great! Appreciate your help

Android Question FindNextTime with dynamic list values

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