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Waiting until two async blocks are executed before starting another block
...e, "Waiting on Groups of Queued Tasks" in the "Dispatch Queues" chapter of Apple's iOS Developer Library's Concurrency Programming Guide
Your example could look something like this:
dispatch_group_t group = dispatch_group_create();
dispatch_group_async(group,dispatch_get_global_queue(DISPATCH_QUE...
How to save an activity state using save instance state?
...ing on the Android SDK platform, and it is a little unclear how to save an application's state. So given this minor re-tooling of the 'Hello, Android' example:
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String concatenation in Ruby
... the usual way
With string interpolation
source = "#{ROOT_DIR}/#{project}/App.config"
with +
source = "#{ROOT_DIR}/" + project + "/App.config"
The second method seems to be more efficient in term of memory/speed from what I've seen (not measured though). All three methods will throw an uniniti...
Connecting to TCP Socket from browser using javascript
I have a vb.net application that opens a socket and listens on it.
6 Answers
6
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Can't find the PostgreSQL client library (libpq)
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And if you use "Postgres.app", under mavericks, you should do : env ARCHFLAGS="-arch x86_64 gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.3/bin/pg_config (Assume you use Postgres.app version 9.3, because the loca...
Apk location in New Android Studio
I started using new Android Studio and cant find the APK of the application in IDE,where it actually locates?
31 Answers
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How do you see recent SVN log entries?
...2 15:31:31 +0200 (Mon, 02 Apr 2012) | 1 line Changed
paths:
A /trunk/java/App/src/database/support
A /trunk/java/App/src/database/support/MIGRATE
A /trunk/java/App/src/database/support/MIGRATE/remove_device.sql
D /trunk/java/App/src/code/test.xml
...
MVC Vs n-tier architecture
...n MVC(which is an architectural pattern) and an n-tier architecture for an application. I searched for it but couldn't find a simple explanation. May be I am a bit naive on MVC concepts, so if anyone can explain the difference then it would be great.
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Custom HTTP headers : naming conventions
...standard, removing the "X-" prefix breaks backwards compatibility, forcing application protocols to support both names (E.g, x-gzip & gzip are now equivalent). So, the official recommendation is to just name them sensibly without the "X-" prefix.
Update 2: On June 2012, the deprecation of rec...
When is TCP option SO_LINGER (0) required?
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I totally agree. I have seen a monitoring application which was initiating many (a few thousands short lived connections every X seconds), and it had probem to scale bigger (a thousand connection more). I don't know why, but the applicatoin was non responsive. Someon...