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z-index not working with position absolute
...pecify relative or absolute position. Here's some background on contexts: http://philipwalton.com/articles/what-no-one-told-you-about-z-index/
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Why are Oracle table/column/index names limited to 30 characters?
... characters. Hmmm.)
Search for "F391, Long identifiers" on this page... http://stanford.edu/dept/itss/docs/oracle/10g/server.101/b10759/ap_standard_sql001.htm
(Looking for a ref)
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How to check if an email address exists without sending an email?
...address for typos or
550-5.1.1 unnecessary spaces. Learn more at
550 5.1.1 http://mail.google.com/support/bin/answer.py?answer=6596 w41si3198459wfd.71
Lines prefixed with numeric codes are responses from the SMTP server. I added some blank lines to make it more readable.
Many mail servers will n...
Is sizeof(bool) defined in the C++ language standard?
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http://msdn.microsoft.com/en-us/library/tf4dy80a.aspx
"In Visual C++4.2, the Standard C++ header files contained a typedef that equated bool with int. In Visual C++ 5.0 and later, bool is implemented as a built-in type with ...
java: HashMap not working
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GNU Trove support this but not using generics. http://trove4j.sourceforge.net/javadocs/gnu/trove/TObjectIntHashMap.html
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MySQL show current connection info
...statement:
SELECT DATABASE();
Other useful functions can be found here: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html
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Where does Jenkins store configuration files for the jobs it runs?
... You can download the config file from a Jenkins node by running: curl http://<ip-address>:8080/job/<job-name>/config.xml > jenkins_config.xml
– JESii
Mar 17 '16 at 14:38
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Nested or Inner Class in PHP
... did not make it (No voting yet, no update since 2013 - as of 2016/12/29):
https://wiki.php.net/rfc/nested_classes
class foo {
public class bar {
}
}
At least, anonymous classes made it into PHP 7
https://wiki.php.net/rfc/anonymous_classes
From this RFC page:
Future Scope
The changes mad...
JS - get image width and height from the base64 code
....naturalHeight had the best results.
const img = new Image();
img.src = 'https://via.placeholder.com/350x150';
img.onload = function() {
const imgWidth = img.naturalWidth;
const imgHeight = img.naturalHeight;
console.log('imgWidth: ', imgWidth);
console.log('imgHeight: ', imgHeight);
};
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Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
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According to the following article: https://www.percona.com/blog/2007/08/28/to-sql_calc_found_rows-or-not-to-sql_calc_found_rows/
If you have an INDEX on your where clause (if id is indexed in your case), then it is better not to use SQL_CALC_FOUND_ROWS and us...