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Boolean operators && and ||
According to the R language definition , the difference between & and && (correspondingly | and || ) is that the former is vectorized while the latter is not.
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Does Typescript support the ?. operator? (And, what's it called?)
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Update: it is supported as of TypeScript 3.7 and called Optional chaining: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-7.html#optional-chaining
I can't find any reference to it whatsoever in the TypeScript language specification.
As far as what to call this opera...
How do I move files in node.js?
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According to seppo0010 comment, I used the rename function to do that.
http://nodejs.org/docs/latest/api/fs.html#fs_fs_rename_oldpath_newpath_callback
fs.rename(oldPath, newPath, callback)
Added in: v0.0.2
oldPath <S...
ActionController::InvalidAuthenticityToken
Below is an error, caused by a form in my Rails application:
24 Answers
24
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Emulator error: This AVD's configuration is missing a kernel file
This problem was discovered when I tried to run the Android emulator in Eclipse. Can't figure out what happened. I searched online for the solution, but it seemed to be vague and I don't understand clearly.
I was following the steps to install the AVD according to the sites and I can't figure out w...
Is it possible to include one CSS file in another?
Is it possible to include one CSS file in another?
17 Answers
17
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How to iterate over the files of a certain directory, in Java? [duplicate]
I want to process each file in a certain directory using Java.
4 Answers
4
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Unable to set data attribute using jQuery Data() API
I've got the following field on an MVC view:
7 Answers
7
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How can you run a command in bash over until success
I have a script and want to ask the user for some information, the script cannot continue until the user fills in this information. The following is my attempt at putting a command into a loop to achieve this but it doesn't work for some reason.
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How Should I Declare Foreign Key Relationships Using Code First Entity Framework (4.1) in MVC3?
I have been searching for resources on how to declare foreign key relationships and other constraints using code first EF 4.1 without much luck. Basically I am building the data model in code and using MVC3 to query that model. Everything works via MVC which is great (kudos to Microsoft!) but now I ...