string-concatenation

问题 I have a table a_x with the columns A and B, column A is in CLOB format, column B number(10): A | B -----------------------------|------- atveroeosipsumloremipsumdolor| 1 stetclitakasdtest | 2 noseatakimataatveroeosipsum | 3 loremipsumdolor | 4 consetetursadipscingelitr | 5 I would like to produce this table, in order to find out, which ID goes with certain substrings: A | IDs -----------------------------|------- atveroeosipsum | 1,3 test | 2 stetclitakasd | 2 noseatakimata | 3

问题 I have a vector of functions and I am trying to obtain subsets from it. I transform the functions in the vector into a cell array so that I can index into it. Here is the script coeff1 = 1; coeff2 = 2; coeff3 = 3; F = @(x) [... coeff1*x(1)*x(4); ... 0; ... coeff2*x(3); ... coeff3*x(7)*x(3) ... ]; G = regexp(func2str(F), ';|\[|\]', 'split'); H = cellfun(@str2func, strcat(G{1}, G(2:end-1)), 'uni', 0); F2 = @(y)cellfun(@(x)x(y),H(2:4)); F2(rand(1,4)); But I get an error when testing the function

问题 Is is okay to use a variable to concatenate a value from several rows ( as an implicit aggregate function )? It seems to work fine on my machine, but I haven't seen it recommended. declare @v_str varchar(4000) = '' select top 5 @v_str = @v_str + ',' + city_name from city_table order by city_name print @v_str 回答1: From nvarchar concatenation / index / nvarchar(max) inexplicable behavior "The correct behavior for an aggregate concatenation query is undefined." 来源： https://stackoverflow.com

问题 For an assesment in C i have to take two files with strings within them, and a string to concatenate them together e.g: If file1 contains Now is the time for all good men to come to the aid of the party. and file2 contains: alpha beta gamma then the output from scat XX file1 file2 (scat being the program name) should be Now is theXXalpha time for allXXbeta good men toXXgamma come to the aid ofXX the party.XX and the output from scat XX file2 file1 should be alphaXXNow is the betaXXtime for

问题 I have an Excel workbook with the following format: | A | B | C | D | E | |----|-------|-------|-------|-------| 1| | po#1 | po#2 | po#3 | po#1 | 2| | date1 | date2 | date3 | date4 | 3|sku1| qty1 | qty4 | qty7 | qty10 | 4|sku2| qty2 | qty5 | qty8 | qty11 | 5|sku3| qty3 | qty6 | qty9 | qty12 | that I need to convert to the following format: | A | B | C | D | |--------|-------|-------|-------| 1| po#1 | date1 | sku1 | qty1 | 2| po#1 | date1 | sku2 | qty2 | 3| po#1 | date1 | sku3 | qty3 | 4| po

问题 how can I concatenate the Values in Cells B1:K1 to receive the string in A1 . Empty cells should be omitted. Is this possible using Excel commands or only with vba? 回答1: If you have Office 365 Excel then you can use an Array form of TEXTJOIN: =TEXTJOIN(", ",TRUE,INDEX(1:1,,N(IF({1},MODE.MULT(IF((IFERROR(MATCH(B1:K1,B1:K1,0)=COLUMN(B1:K1)-MIN(COLUMN(B1:K1))+1,0))*(B1:K1<>""),COLUMN(B1:K1)*{1;1})))))) Being an array it needs to be confirmed with Ctrl-Shift-Enter instead of Enter when exiting

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 6 years ago . In PHP, which is a better way to concatenate strings (with a single-quote) in terms of resources? "Sal's mall is $emo." Or: "Sal's mall is ".$emo.'.' Or: 'Sal\'s mall is '.$emo.'.' 回答1: 'Sal\'s mall is '.$emo.'.' The third way is more efficient (slightly). You can test it by

问题 I am new to Google Apps Script and am trying to combine a series of strings. I have two strings that need to go before and after an inputted cell. if B4 = "string2" the result of the following line should be "string1 string2 string3" . "string1 " + "B4" + " string3" String1 and string3 will always be the same so I can set them each to a variable, but I don't know how to concatenate them together. They need to be combined and outputted to a cell in Sheets. Any help would be greatly appreciated

问题 I have an application in which I need to combine strings within a variable like so: int int_arr[4]; int_arr[1] = 123; int_arr[2] = 456; int_arr[3] = 789; int_arr[4] = 10; std::string _string = "Text " + int_arr[1] + " Text " + int_arr[2] + " Text " + int_arr[3] + " Text " + int_arr[4]; It gives me the compile error Error C2210: '+' Operator cannot add pointers" on the second string of the expression. As far as I can tell I am combining string literals and integers, not pointers. Is there

问题 I have a text input as follows: <input class="input-large" form="form" type="text" name="product_data[product]" id="product_description_product" value="{$product_data.product}" /> Unfortunately I want the information entered into this field to be very specific. The best solution I can think for this, is to provide 3 drop down menus with a range of options. I can edit the HTML and add JavaScript as necessary, but can't edit the form processing script or the database, so the value I need to get