logo
down
shadow

Define print format for custom datatype


Define print format for custom datatype

Content Index :

Define print format for custom datatype
Tag : haskell , By : Vlad Sirenko
Date : December 05 2020, 12:22 PM

With these it helps For the exercise that I'm doing, I implemented a datatype that is similar to Maybe: , You can just use deriving (Show) on your data type:
data Optional a = Some a | None deriving (Show)

Comments
No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

How do I define custom datatype in xsd?


Tag : xml , By : k19k
Date : March 29 2020, 07:55 AM
Does that help I want to check if a field in my XML is of type positive double/decimal. There is a type="xs:positiveInteger" datatype in XSD but no positive double or decimal. Is there a way to achieve this either by defining custom datatype or some other way?
<xs:element name="data">
  <xs:simpleType>
    <xs:restriction base="xs:float">
      <xs:minInclusive value="0"/>
    </xs:restriction>
  </xs:simpleType>
</xs:element>

Define Regular Expression Validation for custom DataType in MVC4


Tag : regex , By : Nulq
Date : March 29 2020, 07:55 AM
around this issue I found out that in order to get MVC4 to render the correct data attributes to the input field, I'd need to replace the hyphens with underscores in the anonymous object passed to the TextBox helper. Here's the code that I ended up with:
SSN.cshtml
@{
    var ssn = (string)ViewData.TemplateInfo.FormattedModelValue;
    if (!String.IsNullOrWhiteSpace(ssn) && ssn.Length == 11)
    {
        ssn = "###-##-" + Model.Substring(Model.Length - 4, 4);
    }
    else {
        ssn = "";
    }
}
@Html.TextBox("", ssn,
    new
    {
        @class = "text-box single-line ssn",
        data_val = "true",
        data_val_regex_pattern = @"^(\d{3}|###)-(\d{2}|##)-\d{4}$",
        data_val_regex = "Expected pattern is ###-##-####",
        placeholder = "###-##-####"
    }
)

Custom Define user datatype vb.net - lika double


Tag : .net , By : Brownell
Date : March 29 2020, 07:55 AM
wish of those help If you are willing to use something other than the / symbol, the easiest approach is to define an Extension Method on Double:
Module DoubleExtensions

    <System.Runtime.CompilerServices.Extension()>
    Public Function Div(value1 As Double, value2 As Double) As Double
        Return Math.Round(value1 / value2, 3)
    End Function

End Module
Private Sub Test()
    Dim x As Double = 1
    Dim y As Double = 3

    Dim z As Double = x.Div(y)

    Debug.WriteLine(z)
End Sub
Public Class MyDouble
    Private m_Double As Double
    Public Sub New(value As Double)
        m_Double = value
    End Sub

    Public Shared Operator =(value1 As MyDouble, value2 As Double) As Double
        value1.Value = value2
        Return value2
    End Operator
    Public Shared Operator <>(value1 As MyDouble, value2 As Double) As Double
        Return value2
    End Operator
    Public Shared Operator /(value1 As MyDouble, value2 As MyDouble) As Double
        Return Math.Round(value1.Value / value2.value, 3)
    End Operator

    Public Property Value As Double
        Get
            Return m_Double
        End Get
        Set(value As Double)
            m_Double = value
        End Set
    End Property
End Class
    Dim x As New MyDouble(1)
    Dim y As New MyDouble(3)

    Dim z As Double = x / y

A better #define print std::cout<<boost::format


Tag : cpp , By : Lucas Thompson
Date : March 29 2020, 07:55 AM
will be helpful for those in need To quickly insert brief debug statements I would like to turn , I would suggest something like
#define print(x) std::cout << (x) << std::endl
print(boost::format("%s") % str);
#include <iostream>
#include <boost/format.hpp>

class Forwarder
{
public:
  Forwarder(const std::string& s)
    : f(s)
  {}

  template <typename T>
  Forwarder& operator%(const T& t)
  {
    f % t;
    return *this;
    // You could even return a reference to f here instead if you wanted
  }

  ~Forwarder()
  {
    std::cout << f << std::endl;
  }

private:
  boost::format f;
};

#define print(x, y) { Forwarder f(x); f % y; }

int main()
{
  std::string str("Hallo");
  int i = 123, j = 456;
  print("%s %d %d", str % i % j);
}
struct END {};
template <>
Forwarder& Forwarder::operator%<END>(const END& t)
{
  std::cout << f << std::endl;
  return *this;
}
print("%s %d %d") % str % i % j % END;
void operator<<=(Logger& l, const Forwarder& f) { ... }
DebugLogger <<= Forwarder("%s %d %d") % str % i % j;
void operator,(const Forwarder& f, Logger& l) { ... }
Forwarder("%s %d %d") % str % i % j, DebugLogger;

Use macro to define print format arguments


Tag : cpp , By : micate
Date : March 29 2020, 07:55 AM
this one helps. I want to define the format %lld and use intro printf or snprintf , You can use string literal concatenation. Since
"STRING1" "STRING2"
"STRING1STRING2"
#define CUSTOM_FORMAT "%lld"
printf("It works " CUSTOM_FORMAT, var); // <-- no comma ;)
Related Posts Related QUESTIONS :
  • How to prevent inputs being flushed into output?
  • Understanding the <$> operator
  • Different notions of weak head normal form?
  • Haskell IO action in `StateT a STM b`
  • How can Monoid r => Const r of the optic Fold type be generalized to Contravariant + Applicative?
  • Haskell stack - allow-newer enabled and won't turn off?
  • How to implement a Lens like Getter for a specific type?
  • Why function composition sometimes requires two "." 's to combine two functions
  • Finding equivalent program to proof in typed lambda calculus
  • How to define Linked list on Haskell?
  • How to check the double list length?
  • What are the rules regarding naming in Haskell?
  • How to determine if one can write a total, terminating Haskell function given a type?
  • Instantiate the Endofunctor type with the Show class
  • How to compose functions that return Bools to one function
  • Parse errors when using 'where' notation - how do I format this structure correctly?
  • How to store higher order function data in list in haskell?
  • Why is a typeclass constraint added when I did not define it in my original type definition?
  • Why is there difference between throw and throwIO?
  • Understanding foldr's definition
  • How to use Data.Data?
  • Overload (*) as a -> b -> c
  • Understanding the State Monad
  • Understanding fmap with a monad
  • Writing a flexible "string fetcher"
  • Understanding the filterM function
  • Why is main's return not an exit code?
  • Is main = return () a program?
  • Why can you create a value with "Just (+)"?
  • Haskell naive duplicate filtering
  • Understanding the writer type
  • pattern matching on constants
  • In Haskell, when using the XStrict language extension, is if short-circuiting?
  • Typeclasses and type inference in Haskell
  • Using foldr with only two parameters
  • The simplest way to generically traverse a tree in haskell
  • Is there a better way of writing indexof function?
  • Performance of Integer type with large numbers
  • Haskell: What does it mean for a type signature to be total?
  • Why doesn't `first` from Data.Bifunctor transform this value
  • Are all types declared with newtype phantom types
  • Understanding type family
  • What can you do that is useful with Haskell Type Classes?
  • Can I write `foldr` (or `foldMap`) in terms of 'recursion schemes' `cata`?
  • What are the pitfalls of using FlexibleContexts and FlexibleInstances?
  • How do I create, and distinguish, global options using 'optparse-applicative'?
  • Binding a type with `Proxy s` vs binding a type with forall
  • How can I create non-repeating palindromic numbers?
  • Understanding type definitions
  • Understanding Why MVar Isn't Updating?
  • Haskell error: Variable not in scope: myEven
  • Visible type application in Haskell : how to bind the type
  • Histomorphism a la Mendler
  • What is the meaning of ~ before (l, r)
  • Traverse/Rewrite a JSON Value
  • Type Errors when implementing Quadtree
  • "Parse error in pattern" when implementing tree
  • Understanding example on Writer Monad
  • Haskell Shelly sample code
  • Finding type signatures in Haskell that are too specific
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com