concatenation

问题 For example, in an array ["1", "2", "3", "4", "5", "6", "7"] I want the code to produce an output of ["1 2", "3 4", "5 6", "7"] What I have so far: public static void combine(ArrayList<String> list) { for (int i = 0; i < list.size(); i++) { String a0 = list.get(i); String a1 = list.get(i + 1); String a2 = a0 + a1; if (list.get(i + 1) == null) { a2 = a1; } list.remove(i); list.remove(i + 1); list.add(i, a2); } } 回答1: Your current code will throw an OutOfBoundsException because it is not

问题 Hello again beloved overflowers, I hope we have some brains available for the picking; as always it's greatly appreciated! :) I have an Events table, which can be assigned multiple categories (used as tags): I then have the Categories (stores each tag) and Events_Categories (linking table) **Events** | id | event_name | +------------+ + 1 | Basketball + 2 | Children Charity Ball + 3 | Bowling Charity Event **Event_Categories** (Stores Tags / Categories) | id | name | +------------+ + 1 |

问题 I need to concatenate a column of cells based on a variable in a previous cell. This will continue on until the specified variable changes. For example: A B C D E 1 x @1 @1+@2+@3 2 x @2 3 x @3 4 y %1 %1+%2+%3 5 y %2 6 y %3 etc. I need the macro to look at A1 and if it's x then begin a concatenated string in E1. Then move to A2, if it's x add D2 to the concatenated value in E1, then move to A3, if it's x add the value in D3 to the concatenated value in E1, etc. Once it hits a new variable in

问题 I'm trying the Morgan and a String challenge in hackerrank (https://www.hackerrank.com/challenges/morgan-and-a-string/) My attempt is the following: public static void main(String[] args) { /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */ Scanner in = new Scanner(System.in); int testCases = in.nextInt(); for(int i=0; i<testCases; i++){ StringBuilder a = new StringBuilder(in.next()); StringBuilder b = new StringBuilder(in.next());

问题 I have two tables, Table1 contains a column with what constitutes a partial value of a column in Table2, for example: Table1.XName = "123456" Table2.ZName = "ABC-123456" I need to create a JOIN that matches these up, but with MS-SQL 2008 I'm having trouble making this work. Here's a sample of my attempt: SELECT * FROM Table1 LEFT OUTER JOIN Table2 ON ('ABC-'+Table1.XName)=Table2.ZName It doesn't matter what type of JOIN I use, or in which direction either, it fails. I know I'm doing something

问题 I have a question about relationships between two tables. Let's say we have a table users, and links. users +++++++++ id name 1 name1 2 name2 3 name3 +++++++++ links +++++++++ id link 1 link1 2 link1 3 link1 +++++++++ Now the normal way to link these two is with a name_links table. For example: name_links ++++++++++++ uid lid 1 1 1 3 2 3 2 1 2 2 3 2 ++++++++++++ Now i was wondering if it is a good idea to make a table like this name_links ++++++++++++ uid lid 1 1,3 2 1,2,3 3 2 ++++++++++++

问题 I need to do 301 redirects on 100+ urls so was wondering if it's possible to use concatenation on the urls so that i don't have to type in every single one. Sample urls would be similar to the following: www.mysite.co.uk/ThisCategory/ThisSubCategory/reviews www.mysite.co.uk/AnotherCategory/AnotherSubCategory/reviews www.mysite.co.uk/YetAnotherCategory/YetAnotherSubCategory/reviews I'm sure there is a way to just take any url beginning with www.mysite.co.uk/ and ending in /reviews but i can't

问题 I think I'm missing something very simple. I have a byte array holding deflated data written into it using a Deflater: deflate(outData, 0, BLOCK_SIZE, SYNC_FLUSH) The reason I didn't just use GZIPOutputStream was because there were 4 threads (variable) that each were given a block of data and each thread compressed it's own block before storing that compressed data into a global byte array. If I used GZIPOutputStream it messes up the format because each little block has a header and trailer

问题 I am trying to concatenate in vb6. The operator += is not supported, and I want to do something like the code below. I want to add more strings to a textbox as the program works down this code. Can anyone advise what to change += to? I know & can be used when adding one string to another, but it the example I am working on here, that doesn't seem suitable. Thanks. If (strHomeNo <> "") Then txtPhoneNums = "Home: " + strHomeNo End If If (strMobileNo <> "") Then txtPhoneNums += "Mobile: " +

问题 I just tried to concatenate arrays in Perl with the + operator and got strange results: perl -wE 'say([1, 2, 3] + [4, 5, 6])' 73464360 Doing the same with hashes seems to be a syntax error: perl -wE 'say({} + {})' syntax error at -e line 1, near "} +" Execution of -e aborted due to compilation errors. What is the result of the 1st expression? Is it documented anywhere? 回答1: It is from the numification of references, which produces the memory address of the reference. perl -E 'say \@a; say 0+\