Lamba Expression To Select All Values Between Lower And Upper
Nov 19, 2010
lambda - vb.net lamba expression to select all values between lower and upper values plus the next lower and upper value. I need some help with a lamda expression to get a subset of range of values. I have a lower and upper value, and getting everything between them seems easy enough, but I also need the next lower and higher value to be included. I can do each of these separately, but would like to do it in one shot if possible.
The range I need the subset from has 150 values. A small example would look like:
{8.206,8.206,8.201,8.196,8.193,8.192,8.189,8.174,8.171,8.171,8.166,8.163,8.157,8.154,8.153,8.14,8.131}
My lower value is: 8.16
My upper value is: 8.17
I need to get back: {8.171,8.171,8.166,8.163,8.157}
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Oct 28, 2009
i have a program using a select case to convert letters to special charaters. My question is how can I get the code to read upper and lower case letters without having to put the upper case letters in my select case statement. Example: Part of my code is
[Code]...
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Feb 7, 2011
Can someone explain what lambda expressions are?
[Code]...
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Dec 23, 2011
The following code produces the compiler error "Expression expected" (Sub is underlined).
Dim lambda As Action(Of Integer) = Sub(x) Console.WriteLine(x)
Why does this not work?
Note: The corresponding C# code works:
Action<int> lambda = x => Console.WriteLine(x);
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Apr 22, 2012
Here is what ive got:
a1 = inputbox("YES or NO")
If a1 = "YES" Or a1 = "yes" Then
That's all we need to know. There are a variety of choices people could put in the input box:
YES
YEs
YeS
yES
yes
Yes
yEs
yeS
I don't want to do if a1 = "YES" or a1 = "YEs" or ... etc
Is there some way I can do:
if a1 = allcase."YES" then
Or something along the lines of that?
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Mar 8, 2012
I'm currently using this bit of code to let only Y, N, and Backspace be typed in my textbox: [code] My problem is that when I debug, the "n" has to be capitalized in order for it to show up in my textbox and the "y" has to be lower cased. Is there anyway that I can bypass this to where it doesn't matter wether or not it is upper or lower case?
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Mar 15, 2012
[Code]....
How can i list like that all probability ?
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May 22, 2011
I am trying to change a user inputed sentence in a console application to the following specs. only the first letter caplized and put a peroid at the end.So have I have the user enter a sentence as a string changed the string to all lower case and displayed the string with a peroid at the end I just can't figure out how to change the first letter of the string to upper case
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Mar 27, 2012
incorportaing i00 Spell check to be forced to check both upper and lower case words?
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Jun 4, 2012
For Each row In ds.Tables(0).Rows
[Code]...
I want to check if this way is correct in finding the Upper and Lower Control limits for a set of data in a data set. I make a 3 demminsional array then find the averages for each hour of each day for a 365 days. Does this work or do I somethign wrong?
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Apr 14, 2009
I have a code to search for specified text in all listbox items. Here it is:
ListBox2.Items.Clear()
For Each item In ListBox1.Items
If item.ToString.Contains(TextBoxDropDown1.Text) Then
[code]....
This works fine. But if I have search for this:
"My Search"
I wont find this:
My sEarCh"
Is there any way to search for text of any casing, and if so how can I adapt my code to do this.
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Oct 15, 2011
Formatting the input text to upper and lower cases e.g Start with a capital.
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Aug 12, 2011
I'm new to VB and I'm trying to get this app to recognize that a "C" is the same as "c" but for some reason its not recognizing it. Its seeing the lower case letters as 10%.
Here is the code I currently have...
Private Sub btnCalculate_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles btnCalculate.Click
Dim subtotal As Decimal = CDec(txtSubtotal.Text)
Dim discountPercent As Decimal
[Code] .....
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Jun 25, 2010
(Not really sure if I phrased the question correctly...) I want to create a lambda expression that would take an Object, attempt to convert it to a passed-in Type, and print to the console whether it was successful or not. At a glance, the lambda expression may seem a pretty silly way to accomplish this task, but I'd really like to know what I'm doing wrong, so I can better grow my skill set.
VS gives me a designer error about the second "T" in the expression below, telling me it isn't defined) This is where I left off:
[Code]...
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Mar 2, 2011
This question may be off-topic. If it should be posted in another place (even on another board) For some given curves (see sample below) I have to quantify whether the red dots in some regions of the curve are more dense at the upper or lower edge of the curve. Which algorithm might be adequate to perform this task? The curves are constructed from measurements. (No mathematical formula behind it.) Every data point has two dimensions: A value in the range 4000-7000 and a second value 0-255.
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Jun 24, 2010
i wanted to create a random number generator that iterates through a series of number between an upper and lower bound. say between 1 and 100. Basically I want the number generator to pick the numbers randomly and then display them until all 100 numbers are picked without any duplicates. so thats easy I can code that. But what I don't know is how to show those numbers in the order they are generated on a windows form. So i have basically a variable that I will let be changed 100 times (or however many times I want, I don't want their to be a size constraint just using 100 as an example) and each time the number is generated I want it displayed on screen (in a list or something not sure what. Hopefully some type of scrollable list) and each successive number also to be displayed in same format beneath it so that I can see the list in its entirety. What type of form control do i use for that? I could do messagebox.show for each iteration but then user is required to hit ok after each iteration and that would obviously be a bad idea if user selected a large number to work through. Anyways, code isn't exactly necessary just point me in the right direction, i.e.what control (if any) to use.how to format the change in data?
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Sep 20, 2010
Is there anyone who can tell me the code for the below? Receive a lower bound and an upper bound of a range. Also receive a number of random numbers to generate. You must validate
1) the numbers are integers
2) the lower bound is less than or equal to the upper bound
3) the number to generate is positive (i.e., > 0).
Generate this many numbers in the specified range and keep track of how many of each are generated in an array of counters. Once all the numbers have been generated, display in a List Box the number, the raw count data, and the percentage of how many times the number was generated displayed with two decimal places of precision.
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Dec 15, 2011
i want to the textbox that when I start to type in names it should be like this Camille Aisha Cordova, How do I do this?
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Oct 27, 2010
Im using a Random Pool number generator and was wondering how i can make it use upper-case and lower-case letters as well as numbers here is a pic
[Code]...
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Jan 19, 2012
I am updating an application I've written used by my employer, a University, to allow students to register for their desired residence hall. I'm working on a new feature that will allow students to "partner" with another student - so that when one or the other registers for a room, the other student will be registered as well.
[Code]...
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May 14, 2011
I made an IP Logging application for my friends web site, and he wanted a program to grab the IPs instead of displaying every bit of information in .net, but still have the entire log intact[code]...
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Aug 15, 2011
I was wondering how i could pass the following SLQ function to my datatable:
Select sum(Quantity) from Purchases where transaction_mode=1
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Jan 17, 2012
Anyone here know how to use DataTable.Select expression but with with a Accent Insensitive way?[code]...
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Jan 15, 2010
I'm using Microsoft Visual Basic 2010 Express...i have a form that has multiple checkedlistbox controls with multiple checkboxes inside. I'm trying to simplify unchecking everyhing. There may be an easier way to do it but here is the code that I'm trying to use.
Private Sub btnUncheck_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUncheck.Click
Private Sub btnUncheck_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUncheck.Click
Dim i As Integer
Dim num As Integer
[code]....
how do I pass the values of my array into my expression that sets the state of the check box (me.ckarray.setitemcheckstate(i,false)?I can see that the values are correct when I uncomment the MsgBox(ckArray(num)). It cycles through all the array values then exits.
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Dec 12, 2010
I am using select command for one of my button
Dim edit1 As OleDbCommand = New OleDbCommand("select * from [exporter] where exp_id='" & t1.Text & "'", con1)
now:-
t1 is a textbox
and in my table exp_id is "Number" now when i run this i get an error at the time executing reader (Data type mismatch in criteria expression.) but when i change exp_id properties to "Text" it run's properly
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May 23, 2012
The following LINQ query resp. call of the extension method Select in Visual Basic 2010 is working fine:
Dim qAvSalary = qJobData.Select(Function(e) e.AvSalary) But doing so I am not able to specify the name of property I want the query (e.g. AvSalary) using a string variable. This should be possible if I use a LINQ expression tree. Searching and trying a long time on how to translate the query to a corresponding expression tree was not successful. My final approach is:
[Code]...
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Mar 23, 2009
Dim re As New Regex("((?<field>[^"",
]+)|""(?<field>([^""]|"""")+)"")((?<rowbreak>,
|
|
|$)|,)")
[Code] .....
Now it puts all the data in the correct columns but there's just a comma in the empty columns.
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Jun 11, 2012
I am trying to build a filter string for my DataView, but I have run into a problem. My underlying DataTable contains values that are formatted when displayed in my DataGridView.For example, if the DataColumn contains 1.52 and the DataGridViewColumn.DefaultCellStyle.Format = "n0" then 2 is displayed.So the user sees 2, then sets the DataView.RowFilter = "DataColumn = 2", and no DataRows are returned. Is there a way to format the DataColumn in the RowFilter string? For example, DataView.RowFilter = "FORMAT(DataColumn, "n0") IN (2, 4)". This filter string should return 3 rows. If not, can LINQ do this?
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Jan 13, 2011
I have a DataTable with two DateTime columns: "start_time" and "end_time".Now, I want to add a third column that calculates the difference between the two DateTimes. But I can't seem to figure out how. I've tried to set the .Expression-value to "start_time - end_time", but it says that "-"-operator is not allowed on DateTime.
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Jun 9, 2010
Does anyone have a regurlar expression available which only accepts dates in the format dd/mm/yy but also has strict checking to make sure that the date is valid, including leap year support?
I am coding in vb.net and am struggling to work this one out.
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