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Run command on the Ansible host
...Yes, you can run commands on the Ansible host. You can specify that all tasks in a play run on the Ansible host, or you can mark individual tasks to run on the Ansible host.
If you want to run an entire play on the Ansible host, then specify hosts: 127.0.0.1 and connection:local in the play, for ex...
Java: Equivalent of Python's range(int, int)?
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Simon SteeleSimon Steele
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How to convert a column number (e.g. 127) into an Excel column (e.g. AA)
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community wiki
Graham
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Java synchronized static methods: lock on object or class
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Since a static method has no associated object, will the synchronized keyword lock on the class, instead of the object?
Yes. :)
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?: operator (the 'Elvis operator') in PHP
... bar will only be evaluated once.
You can also use this to do a "self-check" of foo as demonstrated in the code example you posted:
foo = foo ?: bar;
This will assign bar to foo if foo is null or falsey, else it will leave foo unchanged.
Some more examples:
<?php
var_dump(5 ?: 0); // 5
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Do you use NULL or 0 (zero) for pointers in C++?
...You could not assign NULL to any pointer other than void* , which made it kind of useless. Back in those days, it was accepted that you used 0 (zero) for null pointers.
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Transitions on the CSS display property
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Peter Mortensen
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answered Aug 4 '11 at 14:58
GuillermoGuillerm...
What is the scope of variables in JavaScript?
...ing and closures. This means you can tell the scope of an identifier by looking at the source code.
The four scopes are:
Global - visible by everything
Function - visible within a function (and its sub-functions and blocks)
Block - visible within a block (and its sub-blocks)
Module - visible within...
What's wrong with this 1988 C code?
I'm trying to compile this piece of code from the book "The C Programming Language" (K & R). It is a bare-bones version of the UNIX program wc :
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httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for Se
...hat you'll want to modify your HOSTNAME entry in your /etc/sysconfig/network file to match your chosen name.
– Paul Stengel
Mar 2 '12 at 23:55
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