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Get first day of week in SQL Server

...u should not be surprised that this ends up being a Monday. DATEADD has no idea that you want to add weeks but only until you get to a Sunday, it's just adding 7 days, then adding 7 more days, ... just like DATEDIFF only recognizes boundaries that have been crossed. For example, these both return 1,...
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Maximum single-sell profit

...s! Let's think about solving this problem using dynamic programming. The idea will be to think about the problem as follows. Suppose that we knew the answer to the problem after looking at the first k elements. Could we use our knowledge of the (k+1)st element, combined with our initial solution...
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Find the most common element in a list

...erable)), -L.index(item) return max(groups, key=_auxfun)[0] same basic idea, just expressed more simply and compactly... but, alas, an extra O(N) auxiliary space (to embody the groups' iterables to lists) and O(N squared) time (to get the L.index of every item). While premature optimization is t...
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ReactJS - Does render get called any time “setState” is called?

... replacements. Next part of your question: If so, why? I thought the idea was that React only rendered as little as needed - when the state changed. There are two steps of what we may call "render": Virtual DOM renders: when render method is called it returns a new virtual dom structure o...
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Tricks to manage the available memory in an R session

... I can't back this idea up enough. I've taught R to a few people and this is one of first things I say. This also applies to any language where development incorporates a REPL and a file being edited (i.e. Python). rm(ls=list()) and source() wo...
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Reliable method to get machine's MAC address in C#

...efault. Many of the C# commands and OS queries don't work across OS. Any ideas? I have been scraping the output of "ipconfig /all" but this is terribly unreliable as the output format differs on every machine. ...
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How can I get Maven to stop attempting to check for updates for artifacts from a certain group from

...explicitly wrote that he tried running maven in offline mode but it is not ideal for his purpose! – Honza Zidek Jun 19 '17 at 9:54 add a comment  |  ...
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What is the parameter “next” used for in Express?

... Before understanding next, you need to have a little idea of Request-Response cycle in node though not much in detail. It starts with you making an HTTP request for a particular resource and it ends when you send a response back to the user i.e. when you encounter something lik...
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How are multi-dimensional arrays formatted in memory?

... The answer is based on the idea that C doesn't really have 2D arrays - it has arrays-of-arrays. When you declare this: int someNumbers[4][2]; You are asking for someNumbers to be an array of 4 elements, where each element of that array is of type i...
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How to get Visual Studio 'Publish' functionality to include files from post build event?

... the ExcludeFilesFromDeployment element within the project file. I got the idea from Web Deployment: Excluding Files and Folders So if you need to package project files as they exist in your project directory after a successful build and associated post build steps then do the following. Edit "Pa...