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Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
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I met the same problem when I tried to run a wordpress on my micro instance without RDS.
Adding a Swap page solved the problem for me.
You can follow steps below to setup the swap space.
If it still doesn't work for you, consider using the RDS service.
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How to convert an array of strings to an array of floats in numpy?
...ding the data in as a list, just do np.array(map(float, list_of_strings)) (or equivalently, use a list comprehension). (In Python 3, you'll need to call list on the map return value if you use map, since map returns an iterator now.)
However, if it's already a numpy array of strings, there's a bett...
Verify version of rabbitmq
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sudo rabbitmqctl status
and look for line that looks like that:
{rabbit,"RabbitMQ","2.6.1"},
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What is the yield keyword used for in C#?
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The yield keyword actually does quite a lot here.
The function returns an object that implements the IEnumerable<object> interface. If a calling function starts foreaching over this object, the function is called again until it "yie...
How do I call some blocking method with a timeout in Java?
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You could use an Executor:
ExecutorService executor = Executors.newCachedThreadPool();
Callable<Object> task = new Callable<Object>() {
public Object call() {
return something.blockingMethod();
}
};
Future<Object> fut...
How to keep up with the latest versions of Node.js in Ubuntu? PPA? Compiling?
Where can (can I ?) find .deb packages for the latest versions of Node.js ?
6 Answers
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How to install a node.js module without using npm?
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Is it possible to import a script from an external URL (like var myscript = require("http://www.mywebsite.com/myscript.js"))? It looks like the require function doesn't work for external URLs.
– Anderson Green
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How to pass a user defined argument in scrapy spider
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Spider arguments are passed in the crawl command using the -a option. For example:
scrapy crawl myspider -a category=electronics -a domain=system
Spiders can access arguments as attributes:
class MySpider(scrapy.Spider):
name = 'myspider'
def __init__(self, category='', **kwargs):
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Access Enum value using EL with JSTL
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A simple comparison against string works:
<c:when test="${someModel.status == 'OLD'}">
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Nodejs cannot find installed module on Windows
... with npm.cmd, and nodejs failed to find the installed modules. Take jade for example,
19 Answers
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