numeric

Is there a way to only allow a user to input a maximum number of characters into a text box? I want the user to input a mark/grade and only be able to input 0 - 100. Below I have code that monitors the keystroke and only allows for numbers to be input, but I want to find a way to only allow the user to input a number with a minimum value of 0 and a maximum of 100. private void TxtMark4_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar < '0' || e.KeyChar > '9' || e.KeyChar == ' ') { e.Handled = true; } else { e.Handled = false; } } or I could use the following: if (e.KeyChar >= 48 &&

I try to implement some number type and I hit the issue that mynum * 1 works, but not 1 * mynum I tried to define an implicit conversion like this case class Num(v: Int) { def * (o: Int) = new Num(v*o) } implicit def int2Num(v: Int) = Num(v) but it doesn't seem work, because I always get the following error: scala> 1 * new Num(2) <console>:14: error: overloaded method value * with alternatives: (x: Double)Double <and> (x: Float)Float <and> (x: Long)Long <and> (x: Int)Int <and> (x: Char)Int <and> (x: Short)Int <and> (x: Byte)Int cannot be applied to (Num) 1 * new Num(2) ^ On the other hand 1 *

I have a problem with my numeric vector and dim() in R. I want to know the dimensions of my vector X with: dim(X) However, that function returns NULL. If I type: X I can see that the X is not empty. Why does dim or nrow report it as "NULL"? Part of X: [93486] 6.343e-01 6.343e-01 6.343e-01 6.343e-01 6.343e-01 6.343e-01 6.346e-01 [93493] 6.346e-01 6.347e-01 6.347e-01 6.347e-01 6.347e-01 6.347e-01 6.347e-01 [93500] 6.347e-01 6.347e-01 6.347e-01 6.347e-01 6.347e-01 6.347e-01 6.347e-01 [93507] 6.347e-01 6.347e-01 6.347e-01 6.347e-01 6.347e-01 6.347e-01 6.347e-01 [93514] 6.347e-01 6.347e-01 6.347e

I am currently working on a WPF application where I would like to have a TextBox that can only have numeric entries in it. I know that I can validate the content of it when I lost the focus and block the content from being numeric, but in other Windows Form application, we use to totally block any input except numerical from being written down. Plus, we use to put that code in a separate dll to reference it in many places. Here is the code in 2008 not using WPF: Public Shared Sub BloquerInt(ByRef e As System.Windows.Forms.KeyPressEventArgs, ByRef oTxt As Windows.Forms.TextBox, ByVal

I have a csv file and when i use this command SOLK<-read.table('Book1.csv',header=TRUE,sep=';') I get this output > SOLK Time Close Volume 1 10:27:03,6 0,99 1000 2 10:32:58,4 0,98 100 3 10:34:16,9 0,98 600 4 10:35:46,0 0,97 500 5 10:35:50,6 0,96 50 6 10:35:50,6 0,96 1000 7 10:36:10,3 0,95 40 8 10:36:10,3 0,95 100 9 10:36:10,4 0,95 500 10 10:36:10,4 0,95 100 . . . . . . . . . . . . 285 17:09:44,0 0,96 404 the str(SOLK) outcomes this 'data.frame': 285 obs. of 3 variables: $ Time : Factor w/ 174 levels "10:27:03,6","10:32:58,4",..: 1 2 3 4 5 5 6 6 7 7 ... $ Close : Factor w/ 8 levels "0,92","0,93

I have an error being thrown by SQL Server Management Studio when running this code: declare @percentage numeric(3,2) set @percentage = cast(15 as numeric(3,2)) but when I change numeric declaration to declare @percentage numeric(4,2) set @percentage = cast(15 as numeric(4,2)) everything goes fine. Is there a limitation for numeric data type? Numeric defines the TOTAL number of digits, and then the number after the decimal. A numeric(3,2) can only hold up to 9.99. Lets see, numeric (3,2). That means you have 3 places for data and two of them are to the right of the decimal leaving only one to

What's the difference between the SQL datatype NUMERIC and DECIMAL ? If databases treat these differently, I'd like to know how for at least: SQL Server Oracle Db/2 MySQL PostgreSQL Furthermore, are there any differences in how database drivers interpret these types? David They are the same for almost all purposes. At one time different vendors used different names (Numeric/Decimal) for almost the same thing. SQL-92 made them the same with one minor difference which can be vendor specific: NUMERIC must be exactly as precise as it is defined — so if you define 4 decimal places, the DB must