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How to DROP multiple columns with a single ALTER TABLE statement in SQL Server?
... MS SQL. For fixed length types (int, numeric, float, datetime, uniqueidentifier etc) the space is consumed even for records added after the columns were dropped. To get rid of the wasted space do ALTER TABLE ... REBUILD.
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Ruby: What is the easiest way to remove the first element from an array?
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"pop"ing the first element of an Array is called "shift" ("unshift"
being the operation of adding one element
in front of the array).
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Hash Code and Checksum - what's the difference?
...hashcodes make good checksums.
A checksum has a special purpose --- it verifies or checks the integrity of data (some can go beyond that by allowing for error-correction). "Good" checksums are easy to compute, and can detect many types of data corruptions (e.g. one, two, three erroneous bits).
A h...
Generate URL in HTML helper
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I think that it would be better if constructor also initialize RouteCollection new UrlHelper(htmlHelper.ViewContext.RequestContext, htmlHelper.RouteCollection)
– kpull1
Sep 23 '15 at 7:33
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Count number of occurences for each unique value
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Ah, yes, I can use this, with some slight modification: t(as.data.frame(table(v))[,2]) is exactly what I need, thank you
– gakera
Nov 18 '10 at 13:30
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Showing line numbers in IPython/Jupyter Notebooks
...isibility of current cell line numbers. In more recent notebook versions Shift-L should toggle for all cells.
If you can't remember the shortcut, bring up the command palette Ctrl-Shift+P (Cmd+Shift+P on Mac), and search for "line numbers"), it should allow to toggle and show you the shortcut.
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How do I increase the number of displayed lines of a Java stack trace dump?
...n exception Bar, and throws Bar. Then Foo's stack trace will be shortened. If you for some reason want the full trace, all you need to do is take the last line before the ... in Foo's stack trace and look for it in the Bar's stack trace; everything below that line is exactly what would have been pri...
What is the difference between JSF, Servlet and JSP?
...ile it into a class extending HttpServlet and use it during the web app's lifetime. You can find the generated source code in the server's work directory. In for example Tomcat, it's the /work directory. On a JSP request, the servlet container will execute the compiled JSP class and send the generat...
Entity Framework: How to disable lazy loading for specific query?
Is there any way to disable lazy loading for specific query on Entity Framework 6? I want to use it regularly, but sometimes I want to disable it. I'm using virtual properties to lazy load them.
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Django: accessing session variables from within a template?
If I set a session variable in Django, like:
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