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How to get the host name of the current machine as defined in the Ansible hosts file?
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The necessary variable is inventory_hostname.
- name: Install this only for local dev machine
pip: name=pyramid
when: inventory_hostname == "local"
It is somewhat hidden in the documentation at the bottom of this section.
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What is JavaScript's highest integer value that a number can go to without losing precision?
...egers exactly and to correctly compare them.
From the spec:
Note that all the positive and negative integers whose magnitude is no
greater than 253 are representable in the Number type (indeed, the
integer 0 has two representations, +0 and -0).
To safely use integers larger than this, you...
Adding Xcode Workspace Schemes to Version Control
...ce Schemes that I've created with the other team members. However they are all stored under .xcodeproj > xcuserdata > .xcuserdatad > xcschemes. I've set xcuserdata folders to be ignore in SVN as I assumed all data in that folder were user specific.
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Fastest way to convert string to integer in PHP
... 0.42208
intval("hello"): 0.93678 (222%)
On average, calling intval() is two and a half times slower, and the difference is the greatest if your input already is an integer.
I'd be interested to know why though.
Update: I've run the tests again, this time with coercion (0 + ...
Java Hashmap: How to get key from value?
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The BidiMap interface in the Collections library is a bi-directional map, allowing you to map a key to a value (like normal maps), and also to map a value to a key, thus allowing you to perform lookups in both directions. Obtaining a key for a value is supported by the getKey() method.
There is a ...
JMS and AMQP - RabbitMQ
...le questions making complex :D I hope you are not a teacher :) ) Let's see all of these one by one.
As you know:
The Java Message Service (JMS) API is a Java Message Oriented Middleware (MOM) API for sending messages between two or more clients. JMS is a part of the Java Platform, Enterprise Editi...
Ways to synchronize interface and implementation comments in C# [closed]
...plementation?
I'm currently documenting them both and wouldn't like to manually keep them in sync.
9 Answers
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Why is @font-face throwing a 404 error on woff files?
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Actually the @Ian Robinson answer works well but Chrome will continue complain with that message :
"Resource interpreted as Font but transferred with MIME type application/x-woff"
If you get that, you can change from
appli...
T-SQL: Using a CASE in an UPDATE statement to update certain columns depending on a condition
I am wondering if this is possible at all. I want to update column x if a condition is true, otherwise column y would be updated
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Python idiom to return first item or None
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Oh, I don't like this at all. If any item in the list evaluates False, that value is discarded and replaced. If you have an empty string "" in the list, that is discarded and replaced by an empty list []. If you have a 0, also replaced by []. If ...