Comments by ninjaef - CodeProject

ninjaef 10-Oct-18 8:27am View

FIXED IT !!

<meta http-equiv="X-UA-Compatible" content="IE=edge">

at the top of the HTML file, but can someone explain what this is doing. I found the solution just goolging tens of "jquery not working IE"

however, this is legacy stuff for IE11 and so I switched to the following, but it still didnt work. Only the meta tag works:

<!doctype html>

ninjaef 10-Oct-18 8:22am View

It is running from local disk. Double clicking it. But have also entered the full C:\test\index.html in the nav bar in IE, same behaviour - it doesnt work (in IE) but is flawless in chrome.
I'm using IE11

ninjaef 27-Jun-18 5:59am View

No. Completely wrong. You miss the point despite my laboured text. I am actually a seasoned C, C#, C++, Java, and OOD/OOP engineer with 28years experience. What I have asked for , specifically, is BEST PRACTICE "Pythonic" way to model this in PYTHON where the constructs , semantics, features, standard library and data models DIFFER and can be the subject of much detabte: e.g. @Property, or getters/setters, or plain defs() for class attributes, "_var" and "__var" conventions, inheritence and passing around of through class types ,class objects , class instances. Python differs and the same problem can be resolved in many ways, more so than other languages I would say.
Note Richard, there is no Python discussion area on the forum, not lesat if one looks a the subforum titles under "Discussions"
I do not need "training" in the regard of OO and I dare say I would learn nothing from you Richard!. Please , remember that sometimes knowledge comes in many guises.

ninjaef 22-Jun-18 8:26am View

yes, understand C++
thanks for the example
got it now...simple now you explained it that way.
yes, ive heard of python duckduck principles and use-me-dont-abuse me ideology.

EDIT
sorry, my phone hit 4star instead of 5. meant to give you 5*. sorry

ninjaef 22-Jun-18 6:21am View

Naturall I am reading python documentation, including the section on classes, I felt that was obvious otherwise how would I learn Python - links to a documentation are not really helpful in this instance, I was hoping for an explanation rather than a link to the language docs. Specifically, why is list()[0] allowed to change the "private" __items data ?? I clearly do not understand what is going on despite reading the documentation !

ninjaef 14-Jun-18 7:03am View

That is not what I asked for.

The example you point to, is about binding which can be done outside of a class hierarchy. My question, was specifically how to implement a "on_<property>" method with callback system through inhertiance and specfically using method names called "on_" suffixed with the property name , which is "automatically" created by virtue of simply declaring an object of class MyProperty(), as in my example, which I felt was clear enough. Do you need more clarification?

ninjaef 7-Jun-18 2:26am View

Gerry, can you please elaboarate on what you mean by "run local - developer mode" ??

ninjaef 6-Jun-18 12:57pm View

xamarin , conceptually, provid3s a further level of abstraction over .NET (windows) Java (android) all of which of course is an abstraction of, ultimaely, platform O/S APIs.

with xamarin extension to MSVS iy should be possible to easily develop x-platform apps with minimal refactoring.

THANK YOU SO MUCH for those links

ninjaef 6-Jun-18 8:57am View

Ah, I see. Thank you Nathan. I did see .NET core intermixed with .NET . I'm not fully aware of .NET technologies - coming from a *nix/C background - and I also see a ASP.NET which seems different than .NET core ??Typical MS confusio.

So , does .NET core provide the ASP.NET function and can Xamarin be laid over .NET core for ease of app development - it has a rather good Video rendering class framework ?

ninjaef 13-Jul-17 15:31pm View

this seems to be a solution perhaps

but I don't understand what's going on here so don't know how to apply this technique to my problem

but it seems I can create methods of a class at runtime

so I could create a Tagtype.newEnum field?

https://stackoverflow.com/a/25256727/7990543

or what about the Expando object...
https://msdn.microsoft.com/en-us/magazine/ff796227.aspx

but sob, I need help to understand this

ninjaef 13-Jul-17 15:19pm View

sorry

I'm not getting the point across...

which is...

the TagType is used extensively in code we cannot change. for example...

if (tag = TagType.__RESERVED__)....

switch (tag)
__Closed__ :......

and so on

we can't change this object reference

we certainly cannot create a list of a new type and recode

ninjaef 13-Jul-17 12:38pm View

as explained in the OP

not sure what you don't understand? sorry.

but its simple

we have a Tagtype Enum used in lot of code. we need to introduce a mechanism to allow the list of enumerations to be added to at runtime whilst maintaining code references to Tag type, such as

if (a == TagType.someEnum)...

simple

ninjaef 13-Jul-17 10:20am View

example of how I might use collection would be nice?

using the TagType example above?

ninjaef 13-Jul-17 10:11am View

simple and perfect. will give this a go but looks like an elegant solution to extend extant functionality.

Two question though:-
1.the enum.IsDefined() requires a string argument. Is there a simple way to check if an int value is defined within the enum.
2.TagType AnotherEnumValue = (TagType)3 would not "add" the "AnotherEnumValue" to the enum range - in other words IsDefined(3) would yield False? How might we overcome this?

ninjaef 13-Jul-17 10:05am View

Incorrect assumption

The codebase is plugin orientated, albeit that the plugins can be quite large in terms of SLoC. It is the plugin we are responsible for. So the "interpretation" of "enums" is performed in the plugin but distributed via CallBacks. I don't want to get into the design which is why I purposely requested help on a very specific example , and which is why I also did not want to get into a debate on an architecture and design model that we here have little if any control over.

ninjaef 6-Jul-17 2:15am View

No, that does not answer the question

I already have coded a Tokenizer and a LL1 Parser. This converts the BNF notation in a text file to a parse tree (a grammar tree to be precise). I am now stuck.
Normally, one would use hardcoded functions that model the syntax of the language, to read the input program text [file] and parse it according to the language definition.
This is different.
I want to be able to change the BNF and the compiler(interpreter) is able to correctly compile(interpret) a new program text without requiring me to change the code of the compiler(interpreter)
So ANTLR isn't the answer

ninjaef 5-Jul-17 9:47am View

Mmmm. me thinks you obviously didnt read read the question !

ANTLR creates a parser from grammar, the parser needs to be compiled each time the grammar changes.

ninjaef 13-Jun-17 13:23pm View

oh,

and for the sake of us all, don't come of retirement

ninjaef 13-Jun-17 13:22pm View

perfect!

that's an insightful helpful response

thank you sir

ninjaef 13-Jun-17 13:20pm View

that poor uneducated unhelpful response demonstrates all that is bad regarding help forums, and morning that is good.

you have no idea what I have done

please go and "help" someone else. you are not needed on this thread

ninjaef 17-May-17 14:00pm View

this is it!

terface by now:

public interface IProperty
{
public String Name { get; }
}

public class Property<t> : IProperty
{
public Property(String name, T value)
{
Name = name;
Value = value;
}

public String Name { get; private set; }
public T Value { get; private set; }

public override String ToString()
{
return string.Format("{0}: {1}", Name, Value)
}
}

...

var intProp = new Property<int> ("age", 32);
var strProp = new Property<string> ("name", "Earl");
var enumProp = new Property<colorenum> ("eye color", ColorEnum.Magenta);

but i dont really understand what's going on, despite me reading msdn and online

ninjaef 17-May-17 11:56am View

ah, hang on
actually
that's not what I need.
in your example, Title prop, i woould want Value prop that either returns a string for a IDENTIFIER token, or an int for an INTEGER token
not quite the same as the example
and
coming from C language, I'm not sure how to do this

ninjaef 17-May-17 10:42am View

ah. perfect! and better solution than mine as you use compile time type-safe logic. MANY THANKS!

ninjaef 17-May-17 10:28am View

interesting, could you explain / example please?
EDIT: tokens are consumed as chars, as per the grammar I outlined above, and then converted to int if they are INTEGER (as per code above) etc.

ninjaef 17-May-17 10:17am View

pretty self explanatory , as above , I am writing a parser and this includes a tokenizer. each token is read (getnexttoken) where the type (int, char, string, other) is determined at runtime because the token definition is a text file with regex clauses, i.e.

ALPHA=[a-z|A-Z]
DIGIT=[0-9]
INTEGER = DIGIT+
IDENTIFIER = ALPHA (ALPHA | DIGIT)+

etc

so at run time, a token type is as per defined by the grammar

so I want to be able to define a "generic" class where the Value can be interpreted at run time. dynamic sort of models untyped langauges such as python etc.

not good as you say, in C#, I agree, but the compiler lets you do it and the CLR lets you run it!

?

ninjaef 17-May-17 9:57am View

the original ...

public class Token
{
public dynamic Value {get; set;} //compiles
}
Token mytoken = GetNextToken() // works runtime ; token.Value could yield an (int) or a (char) etc

if mytoken.Type = INTEGER then <<treat as int>> else <<treat as char>>

// so polymorphism?

...

as I say, all works as required, arguably easier than your solution, but I was wondering whether my solution was good practice - clearly its allowed in C# and compiles/runs

??

ninjaef 17-May-17 9:03am View

Deleted

ok, but how do I declare an object of the base class:

MyBaseClass token; //wouldnt compile!
...
token=getNextToken();
if <<token is int>> then ... else <<token is string>> ...

ninjaef 17-May-17 8:58am View

okay, but how do I declare an object to receive a token:

MyBaseClass token; //wouldnt compile?
...
...
token = getNextToken() // could return a string or an int

if <<token is int>> then ... else <<token is string>> ...

???

ninjaef 17-May-17 8:52am View

I like this. It also consistent with base/simple types (int, int32, ...) not sure what you call them. Thanks. But, how do I declare an object of MyBaseClass and call .Value for both?

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