concatenation

问题 I have started developing an Access Database for my agency to utilize, starting with incident management. I have been attempting to develop a form that acts as a master index for all of our incidents, as well as a hub to open the investigation's associated form to be used by the investigator. I developed three regular tables and a junction table: Investigations - General Information Target(s) Victim(s) Target/Victim Joiner The General Info Table has a one to many relationship to Targets, and

问题 i have a list of list of strings as below lst = [['a','b','c'],['@','$','#'],['1','2','3']] I want to concatenate each string inside the lists element wise, expected output as below: ['a@1','b$2','c#3'] The size of lst can vary. is there any way to accomplish this without going through for loops. I tried to use map, but its not working. map(str.__add__,(x for x in list)) please help. 回答1: Here's one way zipping the sublists and mapping with ''.join the resulting tuples: list(map(''.join, zip(

问题 I am working with PowerShell to create a renaming script for a number of files in a directory. Two questions here: I have a string variable $strPrefix = "ACV-100-" and an integer counter $intInc = 000001 and I wish to increment the counter $intInc 1 -> 2 and then concatenate the two and store it in a variable $strCPrefix in the following format: ACV-100-000002 . I believe the $intInc will need to be cast in order to convert it once incrementing is complete but I am unsure how to do this.

问题 I am working with PowerShell to create a renaming script for a number of files in a directory. Two questions here: I have a string variable $strPrefix = "ACV-100-" and an integer counter $intInc = 000001 and I wish to increment the counter $intInc 1 -> 2 and then concatenate the two and store it in a variable $strCPrefix in the following format: ACV-100-000002 . I believe the $intInc will need to be cast in order to convert it once incrementing is complete but I am unsure how to do this.

问题 Is it possible to write a method that takes a stringstream and have it look something like this, void method(string str) void printStringStream( StringStream& ss) { method(ss.str()); } And can be called like this stringstream var; printStringStream( var << "Text" << intVar << "More text"<<floatvar); I looked up the << operator and it looks like it returns a ostream& object but I'm probably reading this wrong or just not implementing it right. Really all I want is a clean way to concatenate

问题 I am creating several byte arrays that need to be joined together to create one large byte array - i'd prefer not to use byte[]'s at all but have no choice here... I am adding each one to a List as I create them, so I only have to do the concatenation once I have all the byte[]'s, but my question is, what is the best way of actually doing this? When I have a list with an unknown number of byte[]'s and I want to concat them all together. Thanks. 回答1: listOfByteArrs.SelectMany(byteArr=>byteArr)

问题 I have two string columns a and b in a table foo . select a, b from foo returns values a and b . However, concatenation of a and b does not work. I tried : select a || b from foo and select a||', '||b from foo Update from comments: both columns are type character(2) . 回答1: With string type columns like character(2) (as you mentioned later), the displayed concatenation just works because, quoting the manual: [...] the string concatenation operator ( || ) accepts non-string input, so long as at

问题 apologize if this is a common post, but couldn't find something that fully applies to me. It's a very similar post to (except that instead of just merging the 2 cells, i am looking to merge and concatenate): Macro to merge cells in Excel for rows in which information in other columns matches Referencing the image in the post above, what i am looking for are cells P2 and P3 to be merged and the data to be concatenated. For eg: if P2 had abc, and P3 had xyz, i am looking for end product to be

问题 Problem In Excel I have three columns with names for old governmental areas. These have been standardised to show the main name for the area and the old name in separate columns. Now I would like to display their full name automatically in a separate column using concatenate or any other suitable function. The layout is as such: List item Col. E: Official name of area Col. F: Old name for area Col. G: Full name for area, as printed on original document. This contains what I desire for the

问题 In Dashcode, if I have a dataSource that has, for example, 2 fields called 'FirstName' and 'Last Name', how do I concatenate the 2 fields into one text field in a list view? I'm fairly sure it must be to use a value transformer, so say that I assign the 'FirstName' field to the textfield, and add a value transformer... how do I then add the 'LastName' value to the 'value' variable in the transformer. I'm sure it's to do with dashcode.getDataSource and valueForKeyPath and I think I'm close to