concatenation

问题 This question already has answers here : Flattening a shallow list in Python [duplicate] (23 answers) Flatten an irregular list of lists (44 answers) Closed 6 years ago . I feel like I'm missing something obvious, but there it is... I would like to go from: lst = [[0, 1, 3, 7, 8, 11, 12], [8, 0, 1, 2, 3, 14], 2] to: output = [0, 1, 3, 7, 8, 11, 12, 8, 0, 1, 2, 3, 14, 2] I can do this with a for loop such as: output = [] for l in lst: if hasattr(l, '__iter__'): output.extend(l) else: output

问题 I am using a bash script to execute a program. The program must take the following argument. (The program is gnuplot.) gnuplot -e "filename='output_0.csv'" 'plot.p' I need to be able to assemble the following string: "filename='output_0.csv'" My plan is to assemble the string STRING= filename='output_0.csv' and then do the following: gnuplot -r "$STRING" 'plot.p' . Note I left the words STRING without stackoverflow syntax style highlighting to emphasise the string I want to produce. I'm not

问题 Im looking for a 6 digit random number on the end of foo-, I have been trying for a few hours now with no success. only error messages note: expected 'char *' but argument is of type 'int' Ive tried to convert the int to char but it just doesn't like it, My code is below, #include <stdio.h> #include <stdlib.h> #include <string.h> #include <time.h> char* concat(char *s1, char *s2) { char *result = malloc(strlen(s1)+strlen(s2)+1);//+1 for the zero-terminator //in real code you would check for

问题 I have concatenation problem for multiple string tags in Sax Parser. My Xml Data look(huge list) like.. <Table diffgr:id="Table1" msdata:rowOrder="0"> <ID>213</ID> <LastName>Sirk</LastName> <FirstName>Thomas</FirstName> <Height>6 ft 4 inches</Height> <HomeTown>Glen St. Mary's</HomeTown> <TeamName>Blue Devils</TeamName> <Age>19</Age> <FullName>1 Thomas Sirk</FullName> </Table> <Table diffgr:id="Table2" msdata:rowOrder="1"> <ID>17</ID> <LastName>Vernon</LastName> <FirstName>Conner</FirstName>

问题 I want to combine a list with multiple elements wih an element from a 2nd list. In doing so, however, I want to maintain a sensible string of element names. I've tried the approaches from How to combine two lists in R, but they don't work. Example: l1 <- list(foo = 1:5, bar = 1:5) l2 <- list(abc = 1:5, xyz = 1:5) l3 <- list(cat = 1:5, dog = 1:5) What I want: $foo [1] 1 2 3 4 5 $bar [1] 1 2 3 4 5 $abc [1] 1 2 3 4 5 $cat [1] 1 2 3 4 5 $dog [1] 1 2 3 4 5 Attempts: c(l1,l2,l3) #works fine if I

问题 I am trying to read a tag from XML and then want to concatenate a number to it. Firstly, I am saving the value of the string to a variable and trying to concatenate it with the variable in the for loop. But it throws an error. for i = 0:tag.getLength-1 node = tag.item(i); disp([node.getTextContent]); str=node.getTextContent; str= strcat(str, num2str(i)) new_loads = cat(2,loads,[node.getTextContent]); end Error thrown is Operands to the || and && operators must be convertible to logical scalar

问题 I need help with macros, please! Suppose I’ve got the following constants defined #define foo_tacos_tuesday 1 #define foo_tacos 1 #define foo_nachos_wednesday 2 #define foo_nachos 3 I’d like to write a macro that does the following #define MyFancyMacro( arg1, arg2 ) \ #if ( foo_ ## arg1 ## _ ## arg2 != foo_ ## arg1 ) \ foo_ ## arg1 ## _ ## arg2, foo_ ## arg1, So I can set up a mapping table that only maps the mismatching values: static const int mappingTable[] = { MyFancyMacro(tacos, tuesday)

问题 I am writing a long script for two weeks ago and now due to the way whose it's written, I need to define a variable name by concatenation of two existing variable names. I don't want to concatenate their values but the variables themselves in order to make a new variable. That may sound ridicule, but given the situation, I have no other choice. Is it possible? Thank you for your understanding. 回答1: VBScript doesn't support introspection, so you can't dynamically resolve variable names from

问题 In this Code here i am sending Code number and phone number seperatly, i have two textFiedls phone code number field, and phone number field, but i want to concatenate code number and phone number field and send it as full mobile number... Please help me how to concatenate codenumber and phone number. self.operatorLbl.text = self.operatorStr; self.codeLbl.text = self.codeStr; self.phoneNumLbl.text = self.phoneNumStr; self.balanceLbl.text = self.balanceStr; [post orderConfirm: self.operatorLbl

问题 in an sql table there's an id, first name and last name field. i'd like to concatenate the first and the last name fields and display it as one in a dropdown control. this is the vb.net code: con() sqry = "[SELECT QUERY]" sqcom = New SqlCommand(sqry, sqcon) da.SelectCommand = sqcom ds.Clear() da.Fill(ds) ddl_adv.DataSource = ds ddl_adv.DataTextField = "emp_fname" ddl_adv.DataValueField = "emp_no" ddl_adv.DataBind() sqcon.Close() ^this code displays only the first name. how do i go about