xavi colomer - Developer IT

Working on someone else's code

- by Xavi Valero

I have hardly a year's experience in coding. After I started working, most of the time I would be working on someone else's code, either adding new features over the existing ones or modifying the existing features. The guy who has written the actual code doesn't work in my company any more. I am having a hard time understanding his code and doing my tasks. Whenever I tried modifying the code, I have in some way messed with the working features. What all should I keep in mind, while working over someone else's code?

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Revover original email from Sendmail log

- by Xavi Colomer

I have a website the contact form has been failing silently for two weeks (Wordpress + Contact form 7). Apparently updating to Contact Form 7 made the assigned email to fail [email protected], I also tested with [email protected] and it also failed until I tried with gmail and it finally worked. Apparently @telefonica.net and @me.com domains are not working with this version of the plugin, but I have to investigate the cause. I found the logs of the lost emails, but I would like to know If I can recover the sender or the content of the original messages. May 24 23:41:11 localhost sendmail[27653]: s4P3fBc3027653: from=www-data, size=3250, class=0, nrcpts=1, msgid=<[email protected]_web.com>, relay=www-data@localhost May 24 23:41:11 localhost sm-mta[27655]: s4P3fBdA027655: from=<[email protected]>, size=3359, class=0, nrcpts=1, msgid=<[email protected]_web.com>, proto=ESMTP, daemon=MTA-v4, relay=localhost.localdomain [127.0.0.1] May 24 23:41:11 localhost sendmail[27653]: s4P3fBc3027653: [email protected], ctladdr=www-data (33/33), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=33250, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (s4P3fBdA027655 Message accepted for delivery) May 24 23:41:12 localhost sm-mta[27657]: s4P3fBdA027655: to=<[email protected]>, ctladdr=<[email protected]> (33/33), delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=123359, relay=tnetmx.telefonica.net. [86.109.99.69], dsn=5.0.0, stat=Service unavailable May 24 23:41:12 localhost sm-mta[27657]: s4P3fBdA027655: s4P3fCdA027657: DSN: Service unavailable May 24 23:41:12 localhost sm-mta[27657]: s4P3fCdA027657: to=<[email protected]>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=30000, dsn=2.0.0, stat=Sent Thanks

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DELETE method not working in Apache 2.4

- by Xavi

I'm running Apache 2.4 locally and dealing with RESTful services authenticating through OAuth. GET, PUT and POST work fine but I can't get DELETE to work. I've tried installing WebDAV and mod_dav, overriding methods in .htaccess, tried Limits, force (enable) DELETE options in configuration and pretty much everything I've found in Google and StackExchange. Here's a copy of my .htaccess right now: <IfModule mod_rewrite.c> Header add Access-Control-Allow-Origin: * Header add Access-Control-Allow-Headers: Authorization Header add Access-Control-Allow-Headers: X-Requested-With Header add Access-Control-Request-Method: HEAD Header add Access-Control-Request-Method: GET Header add Access-Control-Request-Method: PUT Header add Access-Control-Request-Method: DELETE Header add Access-Control-Request-Method: OPTIONS Options +FollowSymlinks Options -Indexes RewriteEngine on RewriteRule ^(.*)\.* index.php [NC,L] </IfModule> Chrome's console shows: XMLHttpRequest cannot load http://dev.server.com/cars/favourite/. Method DELETE is not allowed by Access-Control-Allow-Methods. Is there anything I am missing?

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Small laptop with very high resolution

- by Xavi

Is there a small laptop (14in or less) with very high resolution (greater than 1440x900) on the market?

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iPhone Objective-C service handlers

- by Xavi Colomer

Hello community! I am a as3 developer, I am used to use handlers everytime I launch an event and I am wondering which is the best way / practice to do that in Objective C. Let's say I want to call a diferent services from my backend. In as3 would be something like this to listent to the finish event: service.addEventListener( Event.COMPLETE, handler_serviceDidFinished ) service2.addEventListener( Event.COMPLETE, handler_serviceDidFinished2 ) But how can I do the same in Objective C? The problem is I already created the protocols and delegates, but how can I separate each response from the server? For example: -(void)callService:( NSString * )methodName withParameters:(NSMutableDictionary *) parameters { ... if (self.delegate != NULL && [self.delegate respondsToSelector:@selector(serviceDidFinishSuccessfully:)]) { [delegate serviceDidFinishSuccessfully:data]; } } Well I'm trying to create a generic delegate here, so how can I separate each response for every service? My first idea is that maybe I should return the name of the service method in the delegate call to identify each service. Maybe I should create a UID for each service and pass it the same way... Any idea?

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Is there a publicly available CDN that hosts JSON2?

- by Xavi

It's well known that Google and Microsoft host several common javascript libraries on their CDNs (content distribution networks). Unfortunately neither seems to host JSON2.js. I'm aware that I could upload a copy of JSON2.js to my server and serve it myself, but there are a number advantages CDNs offer that I would like to take advantage of. So with that in mind, are there any publicly available CDNs that host JSON2? If not, any idea why?

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Why should I reuse XmlHttpRequest objects?

- by Xavi

From what I understand, it's a best practice to reuse XmlHttpRequest objects whenever possible. Unfortunately, I'm having a hard time understanding why. It seems like trying to reuse XHR objects can increase code complexity, introduce possible browser incompatibilities, and lead to other subtle bugs. After researching this question for a while, I did come up with a list of possible explanations: Fewer objects created means less garbage collecting Reusing XHR objects reduces the chance of memory leaks The overhead of creating a new XHR object is high The browser is able to perform some sort of network optimization under hood But I'm not sure if any of these reasons are actually valid. Any light you can shed on this question would be much appreciated.

Developer IT