offset

问题 Hello i have an Undefined Offset 0 . inside this code. $q = mysql_query("SELECT * FROM category"); if (false === $q) { echo mysql_error(); } while ($r = mysql_fetch_row($q)) { $names[$r[0]] = $r[2]; $children[$r[0]][] = $r[1]; } function render_select($root=0, $level=-1) { global $names, $children; if ($root != 0) echo '<option>' . strrep(' ', $level) . $names[$root] . '</option>'; foreach ($children[$root] as $child) render_select($child, $level+1); } echo '<select>'; render_select(); echo '

问题 FQL is hard. Making sure it returns all possible results is one of the most mystifying exercises I can think of. Consider these queries, that only differ by limit and offset, and their returned results: SELECT caption FROM photo WHERE aid IN (SELECT aid FROM album WHERE owner = me()) AND 0 < created AND created < 1299952078 LIMIT 400 OFFSET 0 Returns 400 results. Okay, cool. SELECT caption FROM photo WHERE aid IN (SELECT aid FROM album WHERE owner = me()) AND 0 < created AND created <

问题 I'm looking for a quick way to find a String in a JTextPane and change the style there, so it gets highlighted. What I currently have is something like this (tpOutput is the JTextPane in question, strSearch the String to be searched.. duh): int index = tpOutput.getText().indexOf(strSearch); StyledDocument doc = tpOutput.getStyledDocument(); doc.setCharacterAttributes(i, strSearch.length(), doc.getStyle("exampleStyle") , false); However, as beautiful as that would be if it worked, it counts

问题 I read in twitter bootstrap-3 docs that it doesn't support col-xs-offset-* classes. This doesn't seem in line with mobile first. Is there a good reason for it? I thought they could be useful. I read this issue report on github but couldn't find any sutitable justification. 回答1: 3.0.1 (released 10/29 http://blog.getbootstrap.com/2013/10/29/bootstrap-3-0-1-released/) does have the col-xs-offset-* classes.. https://github.com/twbs/bootstrap/issues/9689 来源： https://stackoverflow.com/questions

问题 I am writing a simple VM and I have a question on implementing object and structure member access. Since the begin address of a program is arbitrary on each run, and subsequently the address of each and every of its objects is arbitrary too. Thus the only way I can think of to access an object or its member object is by accessing an offset from the "base" pointer, which means there is an arithmetic operation needed to access anything in a program structure. My question is whether this is the

问题 Can I use MySQL functions in the LIMIT offset? Like: SELECT * FROM sites WHERE ... LIMIT FLOOR(1 + RAND() * (SELECT COUNT(*) FROM sites)) , 1 回答1: No, you can't do that directly . LIMIT and OFFSET values must be constants. Citation from the MySQL docs: The LIMIT clause can be used to constrain the number of rows returned by the SELECT statement. LIMIT takes one or two numeric arguments, which must both be nonnegative integer constants (except when using prepared statements). You can use

问题 In PHP, date('I') will tell me if Daylight Savings Time is in effect. Does this tell me if DST is in effect specifically for my server's configured timezone, or whether or not it's in effect period? I'm in Arizona where we don't observe DST. So I need my server to recognize that, say, New York is 2 hours ahead of me right now, but when DST kicks in March next year that it's 3 hours ahead of me. Update: Given the comment that it's for my server's configured time zone, how would I go about

问题 I have some MySQL databases that have several tables that contain (amongst others) some DATETIME columns. I am searching for a way to add some amount of time (say one year) to all DATETIME columns in the whole database. This can be useful if the system-time was wrong when the data was originally written to the database. OR, as in my case to create recent DEMO-data for an application out of historical data. Is there a way to shift all DATETIME fields in a Database at once? If not, How can the

问题 Got some serious issue here, I'am working on an iOS App which has to display an html page in a UIWebView over several columns using CSS multicolum module. I'm adding the following CSS rule to the page to accomplish the multicolumn padding: 0px; height: 850.000000px; -webkit-column-gap: 0px; -webkit-column-width: 620.000000px; Then I need to find the absolute position on screen for some text in the page. The problem is that any call of the offset() method from jQuery works fine EXCEPT the one

问题 In my current PHP script this error comes up: Undefined offset: 1 My code is here: $query = "SELECT item_id, username, item_content FROM updates ORDER BY update_time DESC LIMIT " . $start . ", " . $number_of_posts; $result = mysql_query($query) or die(mysql_error()); while($row = mysql_fetch_assoc($result)) { preg_match("/<p>(.*)<\/p>/",$row['item_content'],$matches); $row['item_content'] = strip_tags($matches[1]); $posts[] = $row; } If you see whats causing this, posting below would really