ios - Which tasks are more suitable to NSOperation than GCD? -


this question has answer here:

which tasks better suited using nsoperation opposed using gcd when programming iphone?

to me seem same thing. can't see strengths , weaknesses 1 has on other.

nsoperation built on top of gcd, question more whether use nsoperation or pass block directly gcd.

an nsoperation bulky , needs more boiler-plate codes set up, has lot more functionality. can create same nsoperation subclass in various parts of code , put them queue , run it.

passing block gcd e.g. dispatch_async quick , disposable. typically don't reuse block anywhere else; set block executed @ point of code, passes gcd or other apis, , go on.

so each has merits.


Comments

Post a Comment

Popular posts from this blog

Add email recipient to all new Trac tickets -

is there configuration change can made trac send notification email address upon creation of new tickets? if can't done through config, plugin second best option, source code modification last resort. note: setting smtp_always_cc in notification section of tracini send messages on updates. i'm in need of email notifications only on creation of new ticket. does have email notification? 1 option have create query list ten (or many) recently-created tickets. when looking @ results of query, use "rss feed" button @ bottom of page subscribe feed notify whenever results of query updated.
Read more

400 Bad Request on Apache/PHP AddHandler wrapper -

i'm trying create wrapper/handler called on apache server whenever requests php script inside of directory. way can authorize users entire directory or write other stuff called when directory called. this best configuration i've been able come with... <directory "/srv/http/innov/public_html"> options -indexes allowoverride order allow,deny allow directoryindex index.php </directory> then in /srv/http/innov/public_html/kb/ have .htaccess file... options -indexes addhandler auth_handler .php action auth_handler ../auth_handler.php then in /srv/http/innov/public_html/kb/auth_handler.php follows... <?php $file = $_server['path_translated']; echo $file; ?> access log: - - [02/dec/2010:17:43:15 -0500] "get /kb/index.php http/1.1" 400 590 error log: [thu dec 02 17:50:19 2010] [error] [client xxx.xxx.xxx.xxx] invalid uri in request /kb/ http/1.1 i've checked browser , seems making proper request...
Read more

php - Change action and image src url's with jQuery -

i parsing form 1 of sites using php proxy. working fine form action , img src of submit button url's relative. how can prepend full http//www.domain.com/ in front of each of url's in form? edit: here's form code once fed through new domain: <div style="display: none;" id="subscribeform" class="newform"> <h5>subscribe our newsletter</h5> <form action="/campaignprocess.aspx?listid=27057" method="post" onsubmit="return checkwholeform93426(this)" name="catemaillistform93426"> <div class="form"> <div class="item"> <label for="clfullname">full name</label> <br /> <input type="text" maxlength="255" id="clfullname" name="fullname" class="cat_textbox_small" st...
Read more