numeric

问题 When use numeric type, for example like this numeric(4,2) and if store in him number 1.2 , at end of number are adding zeros for filling scale part right? that is result is 1.20 There is possible to save "short" scale as "short"? that is without adding zeros at end ? 回答1: You shouldn't worry about extra space used for scale part. According to documentation values of numeric type saved without trailing zeroes: Numeric values are physically stored without any extra leading or trailing zeroes.

问题 I've imported a dataset into R where in a column which should be supposed to contain numeric values are present NULL . This make R set the column class to character or factor depending on if you are using or not the stringAsFactors argument. To give you and idea this is the structure of the dataset. > str(data) 'data.frame': 1016 obs. of 10 variables: $ Date : Date, format: "2014-01-01" "2014-01-01" "2014-01-01" "2014-01-01" ... $ Name : chr "Chi" "Chi" "Chi" "Chi" ... $ Impressions: chr

问题 What is the equivalent expression in SSRS of the following conversion of a date (@Date) in T-SQL? CONVERT(INT,CONVERT(CHAR,@Date,112)) I need the date parameter value to be converted to an integer in YYYYMMDD format. 回答1: Assuming you have a date parameter called YourDate . You could use the following expression: =Cint(Format(Parameters!YourDate.Value, "yyyyMMdd")) Explanation: Step 1: Format the date to the yyyyMMdd format: Format(Parameters!YourDate.Value, "yyyyMMdd") Step 2: Cast the

问题 What is the equivalent expression in SSRS of the following conversion of a date (@Date) in T-SQL? CONVERT(INT,CONVERT(CHAR,@Date,112)) I need the date parameter value to be converted to an integer in YYYYMMDD format. 回答1: Assuming you have a date parameter called YourDate . You could use the following expression: =Cint(Format(Parameters!YourDate.Value, "yyyyMMdd")) Explanation: Step 1: Format the date to the yyyyMMdd format: Format(Parameters!YourDate.Value, "yyyyMMdd") Step 2: Cast the

问题 I tried to use qi::uint_parser<int>() . But it is the same like qi::uint_ . They all match integers range from 0 to std::numeric_limits<unsigned int>::max() . Is qi::uint_parser<int>() designed to be like this? What parser shall I use to match an integer range from 0 to std::numeric_limits<int>::max() ? Thanks. 回答1: Simplest demo, attaching a semantic action to do the range check: uint_ [ _pass = (_1>=0 && _1<=std::numeric_limits<int>::max()) ]; Live On Coliru #include <boost/spirit/include

问题 I tried to use qi::uint_parser<int>() . But it is the same like qi::uint_ . They all match integers range from 0 to std::numeric_limits<unsigned int>::max() . Is qi::uint_parser<int>() designed to be like this? What parser shall I use to match an integer range from 0 to std::numeric_limits<int>::max() ? Thanks. 回答1: Simplest demo, attaching a semantic action to do the range check: uint_ [ _pass = (_1>=0 && _1<=std::numeric_limits<int>::max()) ]; Live On Coliru #include <boost/spirit/include

问题 According to comment in this question I made a custom SwifUI View based on a TextField . It use numeric keypad, you can't input there nothing but numbers and point, there can be only one point (dot), and you can pass a Bindable Double @State value through the View for input. But there is a bug: when you deleting a last zero in "xxx.0" - zero still comes out. When you deleting a dot - zero becomes a part of integer, so it goes to "xxx0" Any idea how to fix it? I tried to make value an integer

问题 The example of the dataset I have is given below, note that I have more than two columns in the total dataset. ID X 1 MJF34 2 GA249D 3 DEW235R 4 4SDFR3 5 DAS3 I want to test whether the first three characters in X are letters, if they are then I want to replace that value to show only the first three letters. If the first three characters aren't letters then I want to replace those values with "FR". Hence the result would be as follows. ID X 1 MJF 2 FR 3 DEW 4 FR 5 DAS Currently X is a

问题 I have got a qestion regarding Excel VBA. I have to perform this task automatically. Is there any possibility to check whether an entire column's contents (not talking about a cell format) is numerical (containing only numbers)? Of course, I know that an alternative way is avaible, i.e. going down cell by cell. I know that a set filter can identify whether the column is numerical. How to get this information via VBA? 回答1: COUNT counts numbers; COUNTA counts numbers and text. =Count(A:A)

问题 I have got a qestion regarding Excel VBA. I have to perform this task automatically. Is there any possibility to check whether an entire column's contents (not talking about a cell format) is numerical (containing only numbers)? Of course, I know that an alternative way is avaible, i.e. going down cell by cell. I know that a set filter can identify whether the column is numerical. How to get this information via VBA? 回答1: COUNT counts numbers; COUNTA counts numbers and text. =Count(A:A)