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Pattern to avoid nested try catch blocks?
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This assumes that Calc1Exception, Calc2Exception, and Calc3Exception share a common base class.
– Wyzard
Oct 17 '11 at 16:18
3
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How to correctly implement custom iterators and const_iterators?
I have a custom container class for which I'd like to write the iterator and const_iterator classes.
6 Answers
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How to add a custom right-click menu to a webpage?
...era 11.01, Firefox 3.6.13, Chrome 9, Safari 5 (all 4 via addEventListener) and IE 8 (attachEvent).
– Radek Benkel
Feb 5 '11 at 20:26
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How should I call 3 functions in order to execute them one after the other?
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In Javascript, there are synchronous and asynchronous functions.
Synchronous Functions
Most functions in Javascript are synchronous. If you were to call several synchronous functions in a row
doSomething();
doSomethingElse();
doSomethingUsefulThisTime();
th...
Xcode “Build and Archive” from command line
Xcode 3.2 provides an awesome new feature under the Build menu, "Build and Archive" which generates an .ipa file suitable for Ad Hoc distribution. You can also open the Organizer, go to "Archived Applications," and "Submit Application to iTunesConnect."
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Copy a table from one database to another in Postgres
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Extract the table and pipe it directly to the target database:
pg_dump -t table_to_copy source_db | psql target_db
Note: If the other database already has the table set up, you should use the -a flag to import data only, else you may see we...
Should Jquery code go in header or footer?
...efore </body>.
If you are unable to do so due to templating issues and whatnot, decorate your script tags with the defer attribute so that the browser knows to download your scripts after the HTML has been downloaded:
<script src="my.js" type="text/javascript" defer="defer"></scrip...
Retain cycle on `self` with blocks
...'s no real alternative here. If you're designing your own block-based API, and it makes sense to do so, you could have the block get passed the value of self in as an argument. Unfortunately, this doesn't make sense for most APIs.
Please note that referencing an ivar has the exact same issue. If yo...
Is there a performance difference between CTE , Sub-Query, Temporary Table or Table Variable?
In this excellent SO question , differences between CTE and sub-queries were discussed.
4 Answers
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Regular expression for letters, numbers and - _
...iteral .
References
regular-expressions.info/Anchors, Character Classes and Repetition
In PHP
Here's a snippet to show how you can use this pattern:
<?php
$arr = array(
'screen123.css',
'screen-new-file.css',
'screen_new.js',
'screen new file.css'
);
foreach ($arr as $s) {
if...