Stack Overflow
Stack Overflow

Questions tagged [at-sign]

19 questions
134
votes
3 answers

What is the at sign (@) in a batch file and what does it do?

One remotely familiar with windows/dos batch scripting will recognize this line: @echo off For many-many days, I was happy with the sentiment that the @ is how echo off is meant to be written at the top of the batch and that's it. However, recently…
n611x007
  • 8,952
  • 8
  • 59
  • 102
29
votes
3 answers

Parsing JSON w/ @ at sign symbol in it (arobase)

My JSON object evaluates to: { "@io": IO, "@type": XXX } If this variable is called my_json, how do I access the @type value of XXX? I tried my_json.@type, but this is giving errors. Help appreciated. Thanks, Nick
user823596
  • 341
  • 1
  • 6
  • 8
11
votes
2 answers

What does '@' mean in Haskell?

I've tried googling but come up short. I am furthering my Haskell knowledge by reading some articles and I came across one that uses a syntax I've never seen before. An example would be: reconstruct node@(Node a b c l r) parent@(Node b d le…
Rewbert
  • 347
  • 1
  • 3
  • 11
11
votes
2 answers

what is the purpose of the @ symbol in front of a variable in octave?

For example: model = svmTrain(X, y, C, @(x1, x2) gaussianKernel(x1, x2, sigma)); Disclaimer: This is from the Coursera ML class, but it's nearly impossible to search for the @ symbol conventionally.
aman
  • 374
  • 3
  • 11
8
votes
3 answers

Why do Julia programmers need to prefix macros with the at-sign?

Whenever I see a Julia macro in use like @assert or @time I'm always wondering about the need to distinguish a macro syntactically with the @ prefix. What should I be thinking of when using @ for a macro? For me it adds noise and distraction to an…
implicit_knowledge
  • 581
  • 6
  • 17
8
votes
3 answers

How to move/rename a file in Subversion with @ characters in it

From the SVN book: The perceptive reader is probably wondering at this point whether the peg revision syntax causes problems for working copy paths or URLs that actually have at signs in them. After all, how does svn know whether news@11 is the…
nulldevops
  • 396
  • 3
  • 15
8
votes
1 answer

How to escape the '@' symbol in bash?

I am trying to add my proxy with authentication parameters in bash, where my password contains an @ symbol. The syntax to add proxy with authentication in bash is as follows: export http_proxy=http://username:password@host:port_no/ Therefore,…
jobin
  • 2,600
  • 7
  • 32
  • 59
3
votes
2 answers

What does @ operator exactly mean in dart?

I see many instances of @ sign like @package_name or @somthing in dart. Although I know the usage of some examples like @override, I can't understand why some packages(eg: @freezed) or dart syntax(eg: @immutable,@lazySingleton) use this operator and…
Saeed All Gharaee
  • 1,546
  • 1
  • 14
  • 27
3
votes
1 answer

Vim: Soft wrap and long lines with at-signs

I have a buffer with :set wrap enabled. It appears like this: If I make the window just a little bigger, the @ signs in the gutter go away, and I can see the full line. My question is what option governs these @ at-signs, and how can I change vim…
user1902824
3
votes
2 answers

How to use twig object variable with at-sign @ inside

I send from Symfony object which contains at-sign @ in variable. Object name is invoice and with {{ dump(invoice) }} in twig template I see object and parameter with path: invoice[0].banSpojDod@showAs But I dont know how to get value of this…
Radek Drlik
  • 107
  • 1
  • 5
3
votes
1 answer

URL with at-sign is truncated

Is anyone familiar with URL format like below? https://www.facebook.com@www.cigital.com https://www.facebook.com:@www.cigital.com As you can see from visiting these URLs, you will be navigated to https://www.cigital.com/ instead of…
yasi
  • 451
  • 7
  • 18
2
votes
3 answers

What does the "at sign" @ mean in this objective C code

I have been using Objective C for quite a few years but I didn't know @ sign can be used like this (line 6 inside the for loop): - (void)encodeWithCoder:(NSCoder *)coder { [coder encodeInteger:mti forKey:@"mti"]; NSMutableArray *arr =…
Ali
  • 18,665
  • 21
  • 103
  • 138
1
vote
1 answer

Is there any way to verify that a @Sign exists before trying to share a key with it?

I am using the @protocol in a Flutter app and was wondering if there was a way to verify if another @sign exists before trying to share a key with it. For now I made a function that will try to share a key with the specified @sign. If there is an…
Code on the Rocks
  • 11,488
  • 3
  • 53
  • 61
1
vote
2 answers

Do not log supressed PHP Warning

Is there any way to find out if this warning was supressed or not using the set_error_handler() function? The code is 2 for @somethingwrong() and somethingwrong(). But I don't want to log all warnings. For example some functions like gzuncompress()…
user2381982
  • 21
  • 3
0
votes
0 answers

"at-sign" in records with Google Cloud DNS

I have one question to define the dns records. In this url (https://cloud.google.com/dns/docs/records), I read Note: Adding the @ symbol in this field causes the record to fail. This generates some doubts, until now whenever I had defined the…
Antonio Calo Chas
  • 1
1
2