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Run a string as a command within a Bash script
...rameters so I ended up with something like:
my_exe ()
{
mysql -sN -e "select $1 from heat.stack where heat.stack.name=\"$2\";"
}
This is something I use to monitor openstack heat stack creation. In this case I expect two conditions, an action 'CREATE' and a status 'COMPLETE' on a stack named ...
Setting property 'source' to 'org.eclipse.jst.jee.server:JSFTut' did not find a matching property
...ies"
(double-click on the server icon, click 'Open launch configuration', select the Arguments tab, then enter this in the 'VM arguments' text box)
You might also find it useful to add the VM argument
-Djava.util.logging.SimpleFormatter.format="%1$tc %4$s %3$s %5$s%n"
as well, which will then in...
TransactionManagementError “You can't execute queries until the end of the 'atomic' block” while usi
...e database. pytest-django also supports this style of tests, which you can select using an argument to the django_db mark:
@pytest.mark.django_db(transaction=True)
def test_spam():
pass # test relying on transactions
...
How to check null objects in jQuery
...
You can use the length property of the jQuery collection returned by your selector:
if ( $('#myDiv').length ){}
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Real world use cases of bitwise operators [closed]
...ut a second time will undo the first. Older GUIs used to rely on this for selection highlighting and other overlays, in order to eliminate the need for costly redraws. They're still useful in slow graphics protocols (i.e. remote desktop).
Those were just the first few examples I came up with - t...
Can I specify a custom location to “search for views” in ASP.NET MVC?
...t viewLocations (.Union(viewLocations)) or just change them (viewLocations.Select(path => "/AnotherPath" + path)).
To register your custom view location expander in MVC, add next lines to ConfigureServices method in Startup.cs file:
public void ConfigureServices(IServiceCollection services)
{
...
Random Gaussian Variables
...PI) * Math.Exp(-((x - μ) * (x - μ)) / (2 * σ * σ));
}
Important: Select the interval of y and the parameters σ and μ so that the curve of the function is not cutoff at it's maximum/minimum points (e.g. at x=mean). Think of the intervals of x and y as a bounding box, in which the curve mu...
Adding a guideline to the editor in Visual Studio
..., install the Editor Guidelines plugin, then right-click in the editor and select this:
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How do I tidy up an HTML file's indentation in VI?
...her move the cursor to the top of the file and indent to the end: gg =G
Or select the desired text to indent and hit = to indent it.
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How stable is the git plugin for eclipse?
...clipse incubation. You can install it using the Eclipse update manager.
Select Help -> Install New Software...
You probably do not have the JGit update URL in your list of sites so in the 'Work with:' field enter this url: http://www.jgit.org/updates
Click Add...
You should now see Eclipse Git...