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Mutex example / tutorial? [closed]
...he wrong times.
We need a mechanism to solve this. We need to impose some ordering to the instructions above. One common mechanism is to block all threads except one. Pthread mutex uses this mechanism.
Any thread which has to execute some lines of code which may unsafely modify shared values by ot...
What does “&” at the end of a linux command mean?
... the "&" sign to run many processes through one (1) ssh connections in order to to keep minimum number of terminals. For example, I have one process that listens for messages in order to extract files, the second process listens for messages in order to upload files: Using the "&" I can run...
Is it possible to make an ASP.NET MVC route based on a subdomain?
...es the homepage as well. This is because of the regex that's generated. In order to fix this, you can make a copy of the CreateRegex method in DomainRoute.cs, name it CreateDomainRegex, change the * on this line to +: source = source.Replace("}", @">([a-zA-Z0-9_]*))"); and use this new method for...
What is the difference between inversedBy and mappedBy?
... write code on the fly cannot ever been considered best practice, it's not php native, and even not included by default in all frameworks. Having all the info about an entity in one place is an anti-argument. Since when grouping all your code into one place is a good thing ? It is a pain to write, a...
c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
...cumentation states that "Composite keys are sorted by lexicographical order, i.e. sorting is performed by the first key, then the second key if the first one is equal, etc". Does this mean that the structure is stored such that a lookup for a specific 2-part composite key will take O(n=1) ...
commandButton/commandLink/ajax action/listener method not invoked or input value not set/updated
...ond click.
If the <h:form> has enctype="multipart/form-data" set in order to support file uploading, then you need to make sure that you're using at least JSF 2.2, or that the servlet filter who is responsible for parsing multipart/form-data requests is properly configured, otherwise the Face...
Simulating group_concat MySQL function in Microsoft SQL Server 2005?
... WHERE empName = a.empName
ORDER BY empName FOR xml path('')), ' ', REQUIRED SEPERATOR)
FROM project_members a
WHERE empName IS NOT NULL
GROUP BY empName
share
...
How to remove/ignore :hover css style on touch devices
...r for them.
If you're able to use an internet duct-tape language such as PHP or Ruby, you can check the user string of the device requesting a page, and simply serve the same content but with a <link rel="mobile.css" /> instead of the normal style.
User strings have identifying information...
Using Linq to get the last N elements of a collection?
....Skip(Math.Max(0, collection.Count() - N));
This approach preserves item order without a dependency on any sorting, and has broad compatibility across several LINQ providers.
It is important to take care not to call Skip with a negative number. Some providers, such as the Entity Framework, will p...
What is recursion and when should I use it?
... I am using your explanation in an article I am writing for PHP Master though I can't attribute it to you. Hope you don't mind.
– frostymarvelous