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Detect when an image fails to load in Javascript
...y wouldn't try and load an image that isn't there.
– PHP Guru
Feb 12 at 19:29
1
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Extracting text OpenCV
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Here is an alternative approach that I used to detect the text blocks:
Converted the image to grayscale
Applied threshold (simple binary threshold, with a handpicked value of 150 as the threshold value)
Applied dilation to thicken lines in image, leading to more compact objects and less...
ALTER TABLE without locking the table?
...f the statement. If it's a big table, INSERT or UPDATE statements could be blocked for a looooong time. Is there a way to do a "hot alter", like adding a column in such a way that the table is still updatable throughout the process?
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How to enable Bootstrap tooltip on disabled button?
...er has display:inline then the tooltip doesn't seem to work. Using display:block and display:inline-block seem to work fine. It also appears to work fine with a floated wrapper.
UPDATE Here's an updated JSFiddle that works with the latest Bootstrap (3.3.6). Thanks to @JohnLehmann for suggesting poi...
What is self-documenting code and can it replace well documented code? [closed]
...ts of the code that are not self-documenting AND
writes a comment for each block of code that explains the intent, or what the code does on a higher abstraction level (i.e. find all files larger than 10 MB instead of loop through all files in a directory, test if file size is larger than 10 MB, yiel...
A good solution for await in try/catch/finally?
I need to call an async method in a catch block before throwing again the exception (with its stack trace) like this :
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Convert MySql DateTime stamp into JavaScript's Date format
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#MySQL
select date_format(my_date_column,'%Y-%m-%dT%T') from my_table;
#PHP
$php_date_str = substr($mysql_date_str,0,10).'T'.substr($mysql_date_str,11,8);
//JavaScript
js_date_str = mysql_date_str.substr(0,10)+'T'+mysql_date_str.substr(11,8);
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Example for boost shared_mutex (multiple reads/one write)?
... @raaj you can get the upgrade_lock, but upgrading to a unique lock will block until the shared_lock is released
– 1800 INFORMATION
Apr 10 '16 at 21:27
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MySQL “WITH” clause
... a feature request for MySQL since January 2006: http://bugs.mysql.com/bug.php?id=16244
Other RDBMS products that support common table expressions:
Oracle 9i release 2 and later:
http://www.oracle-base.com/articles/misc/with-clause.php
Microsoft SQL Server 2005 and later:
http://msdn.microsoft.com/...
Is a DIV inside a TD a bad idea?
...the XHTML DTD I discovered that a <TD>-element is allowed to contain block elements like headings, lists and also <DIV>-elements. Thus, using a <DIV>-element inside a <TD>-element does not violate the XHTML standard. I'm pretty sure that other modern variations of HTML have a...