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Difference between dispatch_async and dispatch_sync on serial queue?
...k is finished whereas dispatch_async return after it is added to the queue and may not finished.
for this code
dispatch_async(_serialQueue, ^{ printf("1"); });
printf("2");
dispatch_async(_serialQueue, ^{ printf("3"); });
printf("4");
It may print 2413 or 2143 or 1234 but 1 always before 3
for ...
How to grep (search) committed code in the Git history
...ommit content (i.e., actual lines of source, as opposed to commit messages and the like), you need to do:
git grep <regexp> $(git rev-list --all)
git rev-list --all | xargs git grep <expression> will work if you run into an "Argument list too long" error.
If you want to limit the sea...
Getting new Twitter API consumer and secret keys
...oject where I want to use OAuth but I don't know where to get the consumer and secret keys.
9 Answers
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Disable autocomplete via CSS
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You can use a generated id and name everytime, which is different, so the browser cannot remember this text-field and will fail to suggest some values.
This is at least the cross browser safe alternative, but I would recommend to go with the answer f...
Why should I use 'li' instead of 'div'?
...or semantic correctness. HTML has the ability to express lists of things, and it helps the Google robot, screen readers, and all manner of users who don't care solely about the presentation of the site understand your content better.
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Correct owner/group/permissions for Apache 2 site files/folders under Mac OS X?
...can put this one to rest for me? My permissions are screwed up on my sites and I'm not sure how to fix them without just slamming a recursive 777 on everything which is quite obviously incorrect.
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What is an Intent in Android?
... happen. Depending on the intent, apps or the OS might be listening for it and will react accordingly. Think of it as a blast email to a bunch of friends, in which you tell your friend John to do something, or to friends who can do X ("intent filters"), to do X. The other folks will ignore the email...
How do I create a file AND any folders, if the folders don't exist?
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And don't forget about Path.GetDirectoryName(string path) to get the directory from your full path
– Oliver
Jul 8 '10 at 8:21
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Maximum packet size for a TCP connection
... is 1500 bytes. Some types of networks (like Token Ring) have larger MTUs, and some types have smaller MTUs, but the values are fixed for each physical technology.
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Read and write a String from text file
I need to read and write data to/from a text file, but I haven't been able to figure out how.
21 Answers
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