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Why Juila module have to be prefixed with dot?


By : riley8848
Date : October 17 2020, 06:10 PM
around this issue Because you define module A inside your current module. The dot means "look inside the current module for this". https://docs.julialang.org/en/v1/manual/modules/#Relative-and-absolute-module-paths-1
code :


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Drupal 7 relative image path are prefixed with module name


By : هشام إبراهيم
Date : March 29 2020, 07:55 AM
Any of those help I add a "/" before each of my relative link and it worked with clean urls activated

why doesnt ruby allow accessing a method from within a class unless prefixed with module name


By : user3854949
Date : March 29 2020, 07:55 AM
help you fix your problem , Whenever you type a method call without an explicit receiver like
code :
log
self.log
class Shape
  def self.test
    self.log
  end
end
module Hello
  # add all instance methods as class methods
  extend self

  def log
    p "log called"
  end

  class Shape
    # Module.nesting.last is just a clever way of referring to Hello
    extend Module.nesting.last

    def self.test
      log
    end
  end

  def test1
    log
  end
end

Import from module using prefix without exposing non-prefixed things


By : Michael Panich
Date : March 29 2020, 07:55 AM
this will help The prefix-in form only imports the prefixed names, not the unprefixed ones. However, the racket language includes the racket/tcp module by default, so it is already imported when the REPL starts up. If you use #lang racket/base, instead, then tcp-accept won’t be imported, so the prefixed import will be the only imported identifier. You can simulate this using the -I racket/base option in the REPL:
code :
$ racket -iI racket/base
Welcome to Racket v6.7.0.4.
> (require (prefix-in tcp: racket/tcp))
> tcp-accept
; tcp-accept: undefined;
;  cannot reference undefined identifier
; [,bt for context]
> tcp:tcp-accept
#<procedure:tcp-accept>

Inheritance failing when class name is prefixed with module name


By : user1954954
Date : March 29 2020, 07:55 AM
around this issue There is no need to repeat the module name as you did in your first example. And furthermore using a . instead of :: to separate the module name from the class name is not valid Ruby.
Just use
code :
module MyModule
  class ErrorClass < StandardError
    # ...
  end
end
class MyModule::ErrorClass < StandardError # note the colons
  # ...
end

How does one perform the exp() operation element-wise in Juila?


By : user3477096
Date : March 29 2020, 07:55 AM
seems to work fine In julia, operations on matrices treat the matrix as an object rather than a collection of numbers. As such exp(A) tries to perform the matrix exponential which is only defined for square matrices. To get element-wise operations on matrices, you use broadcasting which is done with the dot operator. Thus here, you want exp.(A).
This design is used because it allows any scalar operation to be done on arrays rather than just the ones built in to the language.
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