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问题 Assuming this table with nearly 5 000 000 rows CREATE TABLE `author2book` ( `author_id` int(11) NOT NULL, `book_id` int(11) NOT NULL, KEY `author_id_INDEX` (`author_id`), KEY `paper_id_INDEX` (`book_id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci is it possible to add a primary index column id with autoincrement as first place? I expect something like this: CREATE TABLE `author2book` ( `id` int(11) NOT NULL AUTO_INCREMENT, <<<< This is what I try to achieve! `author_id` int

问题 In my table I have DateTime , Hour column. example : 2012-05-14 00:00:00.000 and 1230 How can I add this hour column into my Datetime column, so I can have 2012-05-14 12:30:00.000 I tried with this: SELECT DATE_DEBUT, HEURE_DEBUT, DATEADD(hour, CONVERT(int, SUBSTRING(HEURE_DEBUT, 0, 2)), DATE_DEBUT) AS DateTemp, DATEADD(hour, CONVERT(int, SUBSTRING(HEURE_DEBUT, 2, 2)), DateTemp) AS DateComplete FROM ESPTEMPS_PROGRAMMATION but it does not work. thanks you in advance, Stev 回答1: From what I

问题 I am using jsPDF to generate PDF's out of dynamic HTML content of my web-application. Right now I am trying to give those PDF's a unique layout. I want to add a "header" & "footer" for each page of my PDF. jsPDF generates page breaks automaticly and there is no command to act on those. Is there any known work-a-round to implement a fixed header/footer for each page without depending on doc.addPage(); Looking forward for any help or ideas. 回答1: See https://github.com/MrRio/jsPDF/pull/260 You

问题 When I add a plugin to a 3.0.0 phonegap project with an android platform, I have an error eventhough a bunch of files for the plugin are added. In addition to that error when I add it, the Android manifest never gets updated with the right authorizations. $ cordova plugin ls No plugins added. 'Use cordova plugin add <plugin>'. $ sudo cordova plugin add "http://git-wip-us.apache.org/repos/asf/cordova-plugin-media-capture.git" { [Error: ENOENT, no such file or directory '/tmp/plugman

问题 This question already has answers here : How can I quickly sum all numbers in a file? (27 answers) Closed 3 years ago . How do I add numbers together inside the shell using a while or for loop? I just want a really simple program that works with standard input and files. Example: $ echo 1 2 | sh myprogram 3 And if a file myfile contains a list of numbers, I want to be able to do this: sh myprogram myfile and get the sum of the numbers as output. 回答1: While this question is at its core a

问题 I can add, edit, delete database using listbox. But I want to do it using DatagridView I already bind it to my database. How do I add,edit,delete update my database in datagridview using codes? These are my codes: namespace Icabales.Homer { public partial class Form1 : Form { SqlConnection cn = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=c:\users\homer\documents\visual studio 2010\Projects\Icabales.Homer\Icabales.Homer\Database1.mdf;Integrated Security=True;User Instance

问题 I'm tryin to add a text comment (not a note) to a pdf file. I create a date.ps file with contains the text comment : %! /Arial findfont 30 scalefont setfont newpath 10 720 moveto (PAID on 5.1.2013) show showpage and I launch the shell command with $i=name of the pdf file to tag: gs -q -dNOPAUSE -dSAFER -dBATCH -sOutputFile=$RFP/$DOMAINE/$NEWNAME -sDEVICE=pdfwrite -sPAPERSIZE=a4 date.ps $i This works, but it create a new 1st page empty with the text "PAID on 5.1.2013" alone. I do not find the

问题 I want to convert a sorted integer array into a binary search tree. I believe I understand how to do this. I have posted my pseudo-code below. What I cannot picture is how the recursion actually works. So if my array is 1, 2, 3, 4, 5... I first make 3 the root of my BST. Then I make 2 the left-child node of 3. Then do I make 1 the left-child node of 2, and come back to 2? I don't get how the recursion steps through the whole process... Thanks in advance, and apologies if this question is

问题 I came a cross a problem which I tried pretty much everything without a solution. $('a.hovered').hover(function () { $(this).after(' <img src="images/icons/famfamfam/silk/user_go.png" />'); },function () { $(this).remove(' <img src="images/icons/famfamfam/silk/user_go.png" />'); }); Of course I tried many versions of this remove() without any success. I will be glad if anyone could help me out with this problem. Additionally I would like to add effect of fadeIn() and fadeOut() but of course

问题 I want to add a "custom" uiview onto a uiviewcontroller, this custom view i created with xib and its a seperate from the view controller, does anyone know how to add a uiview with a xib into a uiviewcontroller? Many thanks in advance 回答1: You mean an additional view, not the main controller view? In that case you can declare a property for the view and load the NIB by hand: @interface Controller {} @property(retain) IBOutlet UIView *extraView; @end … - (void) viewDidLoad // or anywhere else {