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How to run only one task in ansible playbook?
... part of the configuration without running the whole playbook.
Both plays and tasks support a “tags:” attribute for this reason.
Example:
tasks:
- yum: name={{ item }} state=installed
with_items:
- httpd
- memcached
tags:
- packages
- template:...
Python: Is it bad form to raise exceptions within __init__?
...e's no other good way to indicate an error condition within a constructor, and there are many hundreds of examples in the standard library where building an object can raise an exception.
The error class to raise, of course, is up to you. ValueError is best if the constructor was passed an invalid ...
Why use argparse rather than optparse?
I noticed that the Python 2.7 documentation includes yet another command-line parsing module. In addition to getopt and optparse we now have argparse .
...
RESTful Authentication via Spring
...(user/pass combo) with each request is not desirable. Per REST guidelines (and internal business requirements), the server must remain stateless. The API will be consumed by another server in a mashup-style approach.
...
Use find command but exclude files in two directories
...t to find files that end with _peaks.bed , but exclude files in the tmp and scripts folders.
6 Answers
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GCD to perform task in main thread
...are on the main thread, the behaviour is the same: the block is scheduled, and executed when the run loop of the main thread is run.
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How does a garbage collector avoid an infinite loop here?
...kes dramatically under 40 seconds per object. That a new object is created and then eligible for finalization is not relevant to the current finalizer.
– Jacob Krall
Jul 10 '14 at 16:09
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Why do Java webapps use .do extension? Where did it come from?
...Ls that will be
processed by the controller servlet --
prefix matching and extension
matching. An appropriate mapping entry
for each approach will be described
below.
Prefix matching means that you want
all URLs that start (after the context
path part) with a particular value to
...
In Git, what is the difference between origin/master vs origin master?
I know, origin is a term for the remote repository and master is the branch there.
6 Answers
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Non-CRUD operations in a RESTful service
...
REST is all about manipulating the state of resources and every business operation has to be mapped to state CRUD operations. If you need hard business operations semantics, you'll have to go the SOAP way (SOAP is actually message passing, but is typically organized in request-r...