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Rails :dependent => :destroy VS :dependent => :delete_all
...e that these are implemented as callbacks, and Rails executes callbacks in order. Therefore, other similar callbacks may affect the :dependent behavior, and the :dependent behavior may affect other callbacks.
:destroy causes all the associated objects to also be destroyed.
:delete_all causes all t...
Using the scrollwheel in GNU screen
...e. I was hoping that I would not have to manually enter scrollback mode in order to use the mouse. Thanks.
– JesperE
Jan 24 '09 at 20:34
4
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Long vs Integer, long vs int, what to use and when?
...t answer the question, which is about the difference between Long and long etc.
– GreenAsJade
Jan 14 '19 at 9:10
No, i...
What is the most frequent concurrency issue you've encountered in Java? [closed]
... server mode, only when the JVM recompiles after x iterations of the loop, etc. Ouch!
– Cowan
Feb 11 '09 at 6:15
2
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What is a columnar database?
...print, highly compressible distribution of data, or spare matrix emulation etc.) rather than provide a general purpose column-oriented DBMS per-se.
Note: The remark about the "single purpose orientation" of several columnar DBMSes is not a critique of these implementations, but rather an additiona...
How to get a random number in Ruby
... @banister: wow, I was convinced that the new api (rand with range, bytes, etc...) was available directly through the Random object. rand with range will be in 1.9.3, and I'll make a feature request for bytes. I've edited my answer
– Marc-André Lafortune
Jun 2...
twitter-bootstrap vs jquery-mobile [closed]
...ap will not help you with touch friendly lists, checkboxes, select menu's, etc.
One more thing to point out, jQueryMobile takes your markup and dresses it with all sorts of pretty stuff using JavaScript. Bootstrap has some javascript, but only for optional components, the rest is CSS.
So to answe...
Unsafe JavaScript attempt to access frame with URL
...ts = file_get_contents($url);
echo $contents;
The HTML
<iframe frameborder="1" id="frametest" src="/remoteInclude.php?url=REMOTE_URL_HERE"></iframe>
<script>
$("#frametest").load(function (){
var contents =$("#frametest").contents();
});
...
How to copy a row and insert in same table with a autoincrement field in MySQL?
... AND table_name = _tableName AND FIND_IN_SET(COLUMN_NAME,@omitColumns) = 0 ORDER BY ORDINAL_POSITION INTO @columns;
SET @sql = CONCAT('INSERT INTO ', _tableName, '(', @columns, ')',
'SELECT ', @columns,
' FROM ', _schemaName, '.', _tableName, ' ', _whereClause);
PREPARE stmt1 FROM @sql;
...
Best Practices for Laravel 4 Helpers and Basic Functions?
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