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Database Design for Tagging
...ke it will suit the situation well. However, I'm not convinced it's a good idea to implement bitmap indexing "manually", like digiguru suggests: It sounds like a complicated situation whenever new tags are added(?) But some DBMSes (including Oracle) offer bitmap indexes which may somehow be of use, ...
How to perform mouseover function in Selenium WebDriver using Java?
...
The reason that this wouldn't quite work is that all calls to webdriver.findElement(By... something) are executed before anything else (that's the only way their result can be passed on to moveElement). At that time the second element that you want to find isn't visible yet bec...
Count with IF condition in MySQL query
...unt()
Try below:
SELECT
ccc_news . * ,
SUM(if(ccc_news_comments.id = 'approved', 1, 0)) AS comments
FROM
ccc_news
LEFT JOIN
ccc_news_comments
ON
ccc_news_comments.news_id = ccc_news.news_id
WHERE
`ccc_news`.`category` = 'news_layer2'
AND `ccc_news`.`sta...
How to get the Full file path from URI
...
Use:
String path = yourAndroidURI.uri.getPath() // "/mnt/sdcard/FileName.mp3"
File file = new File(new URI(path));
or
String path = yourAndroidURI.uri.toString() // "file:///mnt/sdcard/FileName.mp3"
File file = new File(new URI(path));
...
What's the fundamental difference between MFC and ATL?
...e long answer:
MFC was built in the early 90s to try out this new language called C++ and apply it to Windows. It made Office like features available to the development community when the OS didn't have them yet.
[Edit embellishment: I did not work at Microsoft, so I don't know if Office was ever...
How to set custom location for local installation of npm package?
...
Default Config: node_modules/npmconf/config-defs.js
By default, locally-installed packages go into ./node_modules. global ones go into the prefix config variable (/usr/local by default).
You can run npm config list to see your current config and npm config edit to change it.
PS
In general, ...
Select row with most recent date per user
...
Query:
SQLFIDDLEExample
SELECT t1.*
FROM lms_attendance t1
WHERE t1.time = (SELECT MAX(t2.time)
FROM lms_attendance t2
WHERE t2.user = t1.user)
Result:
| ID | USER | TIME | IO |
-------------...
generate model using user:references vs user_id:integer
..., you can see that this is the case:
:001 > Micropost
=> Micropost(id: integer, user_id: integer, created_at: datetime, updated_at: datetime)
The second command adds a belongs_to :user relationship in your Micropost model whereas the first does not. When this relationship is specified, Ac...
PostgreSQL - max number of parameters in “IN” clause?
...using Posgresql's JDBC driver 9.1.
This is a test of "delete from x where id in (... 100k values...)" with the postgresql jdbc driver:
Caused by: java.io.IOException: Tried to send an out-of-range integer as a 2-byte value: 100000
at org.postgresql.core.PGStream.SendInteger2(PGStream.java:201)...
Can I change the checkbox size using CSS?
...e: 110%;
display: inline;
}
<input type="checkbox" name="optiona" id="opta" checked />
<span class="checkboxtext">
Option A
</span>
<input type="checkbox" name="optionb" id="optb" />
<span class="checkboxtext">
Option B
</span>
<input type="ch...