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Difference between two dates in MySQL
...rom MySQL:
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html
for example:
mysql> SELECT DATEDIFF('2007-12-31 23:59:59','2007-12-30 00:00:00') * 24*60*60
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Force re-download of release dependency using Maven
...ven.apache.org/plugins/maven-dependency-plugin/purge-local-repository-mojo.html
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How to check with javascript if connection is local host?
...
if launching static html in browser, eg from location like file:///C:/Documents and Settings/Administrator/Desktop/ detecting "localhost" will not work. location.hostname will return empty string. so
if (location.hostname === "localhost" || loc...
Changing element style attribute dynamically using JavaScript
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Assuming you have HTML like this:
<div id='thediv'></div>
If you want to modify the style attribute of this div, you'd use
document.getElementById('thediv').style.[ATTRIBUTE] = '[VALUE]'
Replace [ATTRIBUTE] with the style at...
Changing the color of an hr element
... also need to specify background-color (as @Ibu suggested in his answer).
HTML 5 Boilerplate project in its default stylesheet specifies the following rule:
hr { display: block; height: 1px;
border: 0; border-top: 1px solid #ccc;
margin: 1em 0; padding: 0; }
An article titled “12 Littl...
JPA CascadeType.ALL does not delete orphans
...s parent's collection. See download.oracle.com/javaee/6/tutorial/doc/bnbqa.html#giqxy
– Archie
Sep 13 '10 at 22:37
Ple...
Android Json and null values
... ).
Reference: http://developer.android.com/reference/org/json/JSONObject.html#isNull%28java.lang.String%29
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Undefined reference to pthread_create in Linux
...@sholsapp Here is the explanation: webpages.charter.net/ppluzhnikov/linker.html
– Employed Russian
Jan 13 '12 at 4:33
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MySQL INSERT INTO table VALUES.. vs INSERT INTO table SET
...quivalent performance wise.
http://dev.mysql.com/doc/refman/5.6/en/insert.html says:
INSERT inserts new rows into an existing table. The INSERT ... VALUES and INSERT ... SET forms of the statement insert rows based on explicitly specified values. The INSERT ... SELECT form inserts rows selected...
Pip install Matplotlib error with virtualenv
... -m pip install matplotlib
(from https://matplotlib.org/users/installing.html)
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