expression

问题 In the following code, why does the definition of the global variable "x" show the warning "data definition has no type or storage class" but the same thing works fine for the local variable "y"?All I am doing for each variable is first declare them in one statement and then define them in another statement.What is the difference that it works fine for one but shows warning for the other? #include<stdio.h> int x; x=303; int main(void) { int y; y=776 ; printf("The value of x is %d,and of y is

问题 I am trying to create a text layer in an R plot containing normal and superscript text that derives from variables. So far I have this: first = c("one", "two", "three") second = c(1, 2, 3) plot(1:3, 3:1) text(1:3, 3:1, labels=first) The way it works now, it shows one, two, etc on the plot. I want it to show one 1 , two 2 , etc. I guess it should be some combination of expression , paste , bquote and maybe another function. I just can't get it to get it to read the data as vectors and make the

问题 I am trying to understand the use of a shared_ptr p when it is used in the construction of an unnamed shared_ptr and the effects this has on p . I was toying with my own examples and wrote the following piece of code: shared_ptr<int> p(new int(42)); cout << p.use_count() << '\n'; { cout << p.use_count() << '\n'; shared_ptr<int>(p); cout << p.use_count() << '\n'; } cout << p.use_count() << '\n'; Output: 1 1 0 1 Is it correct that line 5, uses p to create a temp. shared_ptr (i.e an unnamed

问题 Hope your well. I am working on a report and seem to get a #error. Seems like it is a divide by zero error but I can not work out a solution. The expression: =( Sum(Fields!Line_Sell.Value) - Sum(Fields!Line_Cost.Value) ) / Sum(Fields!Line_Sell.Value) I am relatively new to RS but have tried ISNULL( ) but with no success. Any help, I would be greatful. Thanks 回答1: Let's say you have an expression set to x / y, where y has the potential to be zero. As you experienced, SSRS will change this

问题 I have a problem in Expression I have an Entity public class User{ public string Username{get;set;} public int PhoneNumber{get;set;} public string FIrstName{get;set;} public string LastName{get;set;} } and I have a DTO public class DTOUser{ public string Username{get;set;} public int PhoneNumber{get;set;} public string FIrstName{get;set;} public string LastName{get;set;} } Then I have a snippet code generic public IList<DTOUser> SelectAll(Expression<Func<DTOUser, bool>> predicate) { using

问题 I am using a regular expression to match where conditions in a SQL query. I want WHERE <ANY CONDITION> , but with the exception of WHERE ROWNUM <WHATEVER> . So I do not want ROWNUM to appear after the WHERE keyword. I did use Lookaheads to achieve that. My regex is WHERE (.*(?! ROWNUM )+) . The problem is, it still matches WHERE ROWNUM < 1000 . If I delete the space before ROWNUM in the regex, then any column with a name ending with ROWNUM won't match. If I delete the space after WHERE then

问题 I am working with Canada (fr-CA) locale and trying to do following: var str = "<dataset >{1}</dataset>"; var temp = "<set Cost x = '1,8M $' />"; str = str.replace(/\{1\}/g, temp); OUTPUT: "<dataset ><set Cost x = '1,8M </dataset>" /></dataset>" DESIRED OUTPUT: "<dataset ><set Cost x = '1,8M $'" /></dataset>" replace function is misunderstanding $ ' from '1,8M $' as an expression and hence repeating in the output. Any ideas/workaround? Thank you for your time. 回答1: $' has a special meaning in

问题 I have a field in my SSRS report, that contains a string of numbers delimited with commas (from a coalesce select in SQL). It looks like 12, 91, 160, 171, 223. I would like to change the text color of only ONE specific value (160 for example) in the field, IF the value is also in another field of the report. I already have this for an expression for the Font of the field properties. =iif(Fields!Store_Number.Value.ToString().Contains (Fields!DMHomeStore.Value)= True,"Red","Black") This changes

问题 I will open this up by stating that the expressions do work within the report. The problem is they aren't working together. I currently have a column header formatted based on the values of two columns. Italics and underlined based on the value of Column1. Bold and a specific color based on the value of Column2. I am doing this by using Switch expressions in the text properties. Here is what I have for each: =Switch(Fields!Column1.Value <> "Specific Value","Italic",Fields!Column1.Value =

问题 The format I would like to allow in my text boxes are comma delimited lists followed by a line break in between the comma delimited lists. Here is an example of what I want from the user: 1,2,3 1,2,4 1,2,5 1,2,6 So far I have limited the user using this ValidationExpression: ^([1-9][0-9]*[]*[ ]*,[ ]*)*[1-9][0-9]*$ However with that expression, the user is only able to enter one row of comma delimited numbers. How can proceed to accept multiple rows by accepting line breaks? 回答1: It is