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Check if PHP session has already started
I have a PHP file that is sometimes called from a page that has started a session and sometimes from a page that doesn't have session started. Therefore when I have session_start() on this script I sometimes get the error message for "session already started". For that I've put these lines:
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What is your most productive shortcut with Vim?
I've heard a lot about Vim , both pros and cons.
It really seems you should be (as a developer) faster with Vim than with any other editor.
I'm using Vim to do some basic stuff and I'm at best 10 times less productive with Vim.
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How do you set the startup page for debugging in an ASP.NET MVC application?
...rver. It is not recognised by your deployed server.
Deployed environment
2a) To set the startup page, assuming that you have not change any of the default routings, change the content of /Views/Home/Index.aspx to do a "Server.Transfer" or a "Response.Redirect" to your desired page.
2b) Change y...
Can Visual Studio 2012 be installed side-by-side w/ Visual Studio 2010?
...Visual Studio 2012 interfere/break .NET 4 and/or Visual Studio 2010 if installed side-by-side on the same instance of Windows?
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Set a default parameter value for a JavaScript function
...ing you want, including false or null. (typeof null == "object")
function foo(a, b) {
a = typeof a !== 'undefined' ? a : 42;
b = typeof b !== 'undefined' ? b : 'default_b';
...
}
share
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imp...
Parallelize Bash script with maximum number of processes
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With GNU Parallel http://www.gnu.org/software/parallel/ you can write:
some-command | parallel do-something
GNU Parallel also supports running jobs on remote computers. This will run one per CPU core on the remote computers - even if ...
How to `go test` all tests in my project?
...
This should run all tests in current directory and all of its subdirectories:
$ go test ./...
This should run all tests for given specific directories:
$ go test ./tests/... ./unit-tests/... ./my-packages/...
This should run all tests ...
How to use custom packages
...something very obvious but I cannot find much information about this. Basically, I have these two files in the same folder:
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How to throw an exception in C?
...and caught in the program, but the C code portions will remain ignorant of all of this going on except that exception throwing and catching often rely on functions written in C which reside in the C++ libraries. C is used because you can't risk the function called to do throw needing to throw an exc...
Can lambda functions be templated?
...auto x){}; // imaginary syntax
}
In a constrained template you can only call other constrained templates. (Otherwise the constraints couldn't be checked.) Can foo invoke bar(x)? What constraints does the lambda have (the parameter for it is just a template, after all)?
Concepts weren't ready to t...