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Python None comparison: should I use “is” or ==?
...n comparing arbitrary objects to singletons like None because it is faster and more predictable. is always compares by object identity, whereas what == will do depends on the exact type of the operands and even on their ordering.
This recommendation is supported by PEP 8, which explicitly states th...
INSERT statement conflicted with the FOREIGN KEY constraint - SQL Server
...he referenced table.
If you have SQL Server Management Studio, open it up and sp_help 'dbo.Sup_Item_Cat'. See which column that FK is on, and which column of which table it references. You're inserting some bad data.
Let me know if you need anything explained better!
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Class vs. static method in JavaScript
...keyword which will allow you to create something similar to a class in a standard OOP language.
I'd suggest ignoring __proto__ most of the time because it has poor cross browser support, and instead focus on learning about how prototype works.
If you have an instance of an object created from a fu...
How did this person code “Hello World” with Microsoft Paint?
I have just seen this within the past few days and cannot figure out how it works. The video I talk about is here :
3 Ans...
Ignore whitespace in HTML [duplicate]
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And later css working group minutes say it will be text-space-collapse.
– ysth
Jun 28 '11 at 19:58
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How do I change the default port (9000) that Play uses when I execute the “run” command?
...used by the play framework in development mode when issueing the "run" command on the play console.
21 Answers
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Eclipse: have the same file open in two editors?
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Open your file and then Window->New Editor (Note: in newer versions it will be called New Window)
Then, click on its tab and drag it somewhere else to have two editors of the same file
Update: as mentioned by moschlar, From version 4.4...
Subdomain on different host [closed]
...'m trying to host a subdomain for my site with a different hosting company and I'm running into issues on how to set it up.
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Naming convention for Scala constants?
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The officially recommended style (and I do mean officially) is the first style, camel case with first letter are upper case. It's laid down clearly by Odersky on Programming in Scala.
The style is also followed by the standard library, and has some support i...
Eclipse ctrl+right does nothing
...vigate text on other editors using Ctrl + Right to move to the next word and Ctrl + Shift + Right to select the next word. But on eclipse nothing happens, the cursor stays in the same place.
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