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What are named pipes?
...tain the credentials of the thing on the other end etc).
Unix named pipes appear as a special file in the filesystem and can be accessed with normal file IO commands including the shell. Windows ones don't, and need to be opened with a special system call (after which they behave mostly like a norm...
Does every Core Data Relationship have to have an Inverse?
Let's say I have two Entity classes: SocialApp and SocialAppType
8 Answers
8
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What causes a TCP/IP reset (RST) flag to be sent?
I'm trying to figure out why my app's TCP/IP connection keeps hiccuping every 10 minutes (exactly, within 1-2 seconds). I ran Wireshark and discovered that after 10 minutes of inactivity the other end is sending a packet with the reset (RST) flag set. A google search tells me "the RESET flag signif...
How do you save/store objects in SharedPreferences on Android?
...String(serializedObjectKey, serializedObject);
sharedPreferencesEditor.apply();
}
Retrieve Object from Preference:
public static <GenericClass> GenericClass getSavedObjectFromPreference(Context context, String preferenceFileName, String preferenceKey, Class<GenericClass> classType...
GitHub Error Message - Permission denied (publickey)
...
The upvote of using HTTPS instead of SSL is a bit disappointing. SSH is far more convenient. The suggestion from @MaximeBernard above solved the issue for me: GIT was not looking at the right place for the .ssh directory. Using ssh -vT git@github.com provides a lot of informati...
Where is JAVA_HOME on macOS Mojave (10.14) to Lion (10.7)?
...JAVA_HOME and doesn't actually change it. That's what the Java Preferences app is for, which in my case seems broken and doesn't actually change the JVM correctly. It does list the 1.7 JVM but I can toggle/untoggle & drag and drop all I want there without actually changing the output of /usr/lib...
How do I prevent site scraping? [closed]
...bsite in other site's pages with frames, and embedding your site in mobile apps.
While not technically scraping, mobile apps (Android and iOS) can embed websites, and inject custom CSS and JavaScript, thus completely changing the appearance of your pages.
Human copy - paste: People will copy and p...
Maximum number of threads per process in Linux?
...p_count
echo 200000 > /proc/sys/kernel/pid_max
./100k-pthread-create-app
2018 update from @Thomas, on systemd systems:
/etc/systemd/logind.conf: UserTasksMax=100000
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SSH to Elastic Beanstalk instance
...22 | 192.168.1.1/32
Configure the environment of your Elastic Beanstalk Application
If you haven't made a key pair yet, make one by clicking Key Pairs below Security Group in the ec2 tab.
In the AWS console, open the Elastic Beanstalk tab.
Select the relevant region.
Select relevant Environment...
When to use ' (or quote) in Lisp?
...e quote comes in. Say you want to plot resource allocations from a Python application, but rather do the plotting in Lisp. Have your Python app do something like this:
print("'(")
while allocating:
if random.random() > 0.5:
print(f"(allocate {random.randint(0, 20)})")
else:
...