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What is the reason not to use select *?
...ot prematurely optimizing is to go for simple and straightforward code and then use a profiler to point out the hot spots, which you can then optimize to be efficient.
When you use select * you're make it impossible to profile, therefore you're not writing clear & straightforward code and you a...
C# Entity-Framework: How can I combine a .Find and .Include on a Model Object?
...
You need to use Include() first, then retrieve a single object from the resulting query:
Item item = db.Items
.Include(i => i.Category)
.Include(i => i.Brand)
.FistOrDefault(x => x.ItemId == id);
...
Is there a NumPy function to return the first index of something in an array?
...where(array==item)
The result is a tuple with first all the row indices, then all the column indices.
For example, if an array is two dimensions and it contained your item at two locations then
array[itemindex[0][0]][itemindex[1][0]]
would be equal to your item and so would
array[itemindex[0]...
How can I use PowerShell with the Visual Studio Command Prompt?
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The simplest option is to run the VS 2010 command prompt and then start PowerShell.exe. If you really want to do this from your "home" PowerShell prompt, the approach you show is the way to go. I use a script that Lee Holmes wrote a while back:
<#
.SYNOPSIS
Invokes the specifi...
@Transactional(propagation=Propagation.REQUIRED)
... executing. If the caller of this method has already started a Transaction then this method will use that same physical Transaction on the current database connection.
This @Transactional annotation provides a means of telling your code when it executes that it must have a Transaction. It will not ...
How do I enumerate the properties of a JavaScript object? [duplicate]
...ject and I want all inherited properties? I wouldn't use hasOwnProperty(). Then, let's say, someone adds new properties later. Is that my fault if things behave badly at that point? I don't think so. I think this is why jQuery, as an example, has specified ways of extending how it works (via jQuery....
sqlite database default time value 'now'
...the year 2038, it'd have to use 6 bytes—Hopefully, computers can code by then—and 8 bytes by the year 4461642.
– ma11hew28
Jul 7 '19 at 2:00
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What is the !! (not not) operator in JavaScript?
...ean (for instance, !5 would be false, since 5 is a non-false value in JS), then boolean-inverts that so you get the original value as a boolean (so !!5 would be true).
– Chuck
Apr 24 '09 at 17:14
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How to tell if rails is in production?
...he rails console. On a production server I was able to run: rails console, then the command above.
– Ryan
Sep 9 '16 at 18:56
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Understanding the Rails Authenticity Token
I am running into some issues regarding the Authenticity Token in Rails, as I have many times now.
10 Answers
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