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When should I use perror(“…”) and fprintf(stderr, “…”)?
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How to implement has_many :through relationships with Mongoid and mongodb?
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Difference between __getattr__ vs __getattribute__
... the attribute wasn't found the usual ways. It's good for implementing a fallback for missing attributes, and is probably the one of two you want.
__getattribute__ is invoked before looking at the actual attributes on the object, and so can be tricky to implement correctly. You can end up in infi...
.NET WPF Remember window size between sessions
...tion"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:Services="clr-namespace:YOURNAMESPACE.Services"
Services:WindowSettings.Save="True">
Where WindowSettings is defined as follows:
using System;
using System.ComponentModel;
using System.Configuration;
using System.W...
How to run only one task in ansible playbook?
...ry/tasks/hadoop_master.yml --step --start-at-task='start hadoop jobtracker services'
You will get a prompt: Perform task: start hadoop jobtracker services (y/n/c)
Answer y
You will get a next prompt, press Ctrl-C
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How to delete images from a private docker registry?
...f4:/etc# cat /etc/docker/registry/config.yml
version: 0.1
log:
fields:
service: registry
storage:
cache:
blobdescriptor: inmemory
filesystem:
rootdirectory: /var/lib/registry
delete:
enabled: true
http:
addr: :5000
headers:
X-Content-Type-Optio...
Docker, mount volumes as readonly
...ple on how to specify read-only containers in docker-compose:
version: "3"
services:
redis:
image: redis:alpine
read_only: true
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List all base classes in a hierarchy of given class?
...ass Foo (whether it is a new-style class or not), how do you generate all the base classes - anywhere in the inheritance hierarchy - it issubclass of?
...
What is a daemon thread in Java?
...s in UNIX were those that were constantly running in background, much like services in Windows.
A daemon thread in Java is one that doesn't prevent the JVM from exiting. Specifically the JVM will exit when only daemon threads remain. You create one by calling the setDaemon() method on Thread.
Have...
What's causing my java.net.SocketException: Connection reset? [duplicate]
...an alternative client to your Java code that you could use to test the web service? If this was successful it could indicate a bug in the Java code.
As you are using Commons HTTP Client have a look at the Common HTTP Client Logging Guide. This will tell you how to log the request at the HTTP level....