How to Write a (toy) JVM

Exploring JVM specification and trying to write a little code to interpret a Java class like a real JVM.

Whether we like it or not, but Java is one of the most widely used programming languages. However, since most of the applications in Java are either too boring or too complex - not every Java developer has enough curiosity to look under the hood and see how JVM works.

In this post I will try to write a toy (and incomplete) JVM to show the core principles behind it and hopefully sparkle some interest in you to learn it further.

#java #developer #web-development

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What You Can Learn about Setting from Classic Sitcoms

Giving your novel a strong sense of place is vital to doing your part to engage the readers without confusing or frustrating them. Setting is a big part of this (though not the whole enchilada — there is also social context and historic period), and I often find writing students and consulting clients erring on one of two extremes.

**Either: **Every scene is set in a different, elaborately-described place from the last. This leads to confusion (and possibly exhaustion and impatience) for the reader, because they have no sense of what they need to actually pay attention to for later and what’s just…there. Are the details of that forest in chapter 2 important? Will I ever be back in this castle again? Is there a reason for this character to be in this particular room versus the one she was in the last time I saw her? Who knows!

Or: There are few or no clues at all as to where the characters are in a scene. What’s in the room? Are they even in a room? Are there other people in th — ope, yes, there are, someone just materialized, what is happening? This all leads to the dreaded “brains in jars” syndrome. That is, characters are only their thoughts and words, with no grounding in the space-time continuum. No one seems to be in a place, in a body, at a time of day.

Everything aspect of writing a novel comes with its difficulties, and there are a lot of moving pieces to manage and deploy in the right balance. When you’re a newer writer, especially, there’s something to be said for keeping things simple until you have a handle on how to manage the arc and scope of a novel-length work. And whether you tend to overdo settings or underdo them, you can learn something from TV, especially classic sitcoms.

Your basic “live studio audience” sitcoms are performed and filmed on sets built inside studios vs. on location. This helps keep production expenses in check and helps the viewer feel at home — there’s a reliable and familiar container to hold the story of any given episode. The writers on the show don’t have to reinvent the wheel with every script.

Often, a show will have no more than two or three basic sets that are used episode to episode, and then a few other easily-understood sets (characters’ workplaces, restaurants, streets scenes) are also used regularly but not every episode.

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Write My Paper for Me Online: Can You Do My Research Paper USA? TheWritingPlanet.com

We understand the paint that understudies need to experience every day considering the course that at whatever point you have completed all your astute necessities for your Ph.D. or of course MA, you’ll need to begin searching after the piece. So what do you think? Okay have the choice to control it with no other individual, or you require dissertation help from a readied capable? As a general rule, it’s a long cycle as you need to make a broad paper out of around 10 to 20 thousand words starting with the presentation of your subject and some time later your explanations behind why it should be dissected. Following the model, you’ll need to make a creation audit that will join the pushing assessments that will other than control your paper’s theoretical structure. It sounds tangled. Really, it is.

This assignment is one of the most tiring and unusual ones an understudy needs to look during his 16 to 18 years of training. In any case, once more, we have your back this time too. I handle the focuses above may have made you anxious about this undertaking, in any case we have proficient **dissertation service**s who give marvelous work affiliations. You’re at the ideal spot and that too at the ideal time since we have a markdown on the all out of our creation relationship at TheWritingPlanet. Subsequently, it’s the best an ideal open entry for you to benefit of our affiliations while you discharge your anxiety by chilling. In any case, it is commonly your decision to do it without anyone’s help or select an expert to do it for you.

You comprehend that a recommendation or hypothesis is unquestionably new for you, and you’ll need to battle while guiding it, so it will require an enormous heap of effort for you to begin and thusly finish it. Do you think you have great event to do it? Or of course plainly would you have the decision to do it as enough as an expert would do it? Contemplating everything, you’ll find your answer when you utilize TheWritingPlanet’s piece benefits that will help you in creation your hypothesis, proposition, or reference paper. Considering everything, remember you take hypothesis help from our association. Considering, you’ll be getting the help of a Ph.D. degree holder who has enormous combination with making a few affiliations and proposal papers beginning at now. It would other than help on the off chance that you didn’t stress over passing marks since you will accomplish the most raised of all. Do you know why? This is on the grounds that our party of journalists wires Ph.D. holders who were top graders in their particular fields and schools. Accordingly, you will get ensured results at TheWritingPlanet.

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Teachers don’t like that the time they give for finishing the speculation isn’t sufficient for an understudy considering the way that an epic piece of the understudies have a colossal heap of different things on their can list. Some of them need to consider their family; some need to deal with their positions while some sit back pushing. Thusly, if your cutoff time is drawing nearer soon, you’re so far in no disposition regardless, your suggestion paper with no other individual, by then you’ll truly need to pick and hand over your undertaking to us. We won’t let you gobble up additional time since it continues moving endlessly from our hands, and we don’t have anything left back near the end.

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Generis: Versatile Go Code Generator

Generis

Versatile Go code generator.

Description

Generis is a lightweight code preprocessor adding the following features to the Go language :

• Generics.
• Free-form macros.
• Conditional compilation.
• HTML templating.
• Allman style conversion.

Sample

package main;

// -- IMPORTS

import (
    "html"
    "io"
    "log"
    "net/http"
    "net/url"
    "strconv"
    );

// -- DEFINITIONS

#define DebugMode
#as true

// ~~

#define HttpPort
#as 8080

// ~~

#define WriteLine( {{text}} )
#as log.Println( {{text}} )

// ~~

#define local {{variable}} : {{type}};
#as var {{variable}} {{type}};

// ~~

#define DeclareStack( {{type}}, {{name}} )
#as
    // -- TYPES

    type {{name}}Stack struct
    {
        ElementArray []{{type}};
    }

    // -- INQUIRIES

    func ( stack * {{name}}Stack ) IsEmpty(
        ) bool
    {
        return len( stack.ElementArray ) == 0;
    }

    // -- OPERATIONS

    func ( stack * {{name}}Stack ) Push(
        element {{type}}
        )
    {
        stack.ElementArray = append( stack.ElementArray, element );
    }

    // ~~

    func ( stack * {{name}}Stack ) Pop(
        ) {{type}}
    {
        local
            element : {{type}};

        element = stack.ElementArray[ len( stack.ElementArray ) - 1 ];

        stack.ElementArray = stack.ElementArray[ : len( stack.ElementArray ) - 1 ];

        return element;
    }
#end

// ~~

#define DeclareStack( {{type}} )
#as DeclareStack( {{type}}, {{type:PascalCase}} )

// -- TYPES

DeclareStack( string )
DeclareStack( int32 )

// -- FUNCTIONS

func HandleRootPage(
    response_writer http.ResponseWriter,
    request * http.Request
    )
{
    local
        boolean : bool;
    local
        natural : uint;
    local
        integer : int;
    local
        real : float64;
    local
        escaped_html_text,
        escaped_url_text,
        text : string;
    local
        integer_stack : Int32Stack;

    boolean = true;
    natural = 10;
    integer = 20;
    real = 30.0;
    text = "text";
    escaped_url_text = "&escaped text?";
    escaped_html_text = "<escaped text/>";

    integer_stack.Push( 10 );
    integer_stack.Push( 20 );
    integer_stack.Push( 30 );

    #write response_writer
        <!DOCTYPE html>
        <html lang="en">
            <head>
                <meta charset="utf-8">
                <title><%= request.URL.Path %></title>
            </head>
            <body>
                <% if ( boolean ) { %>
                    <%= "URL : " + request.URL.Path %>
                    <br/>
                    <%@ natural %>
                    <%# integer %>
                    <%& real %>
                    <br/>
                    <%~ text %>
                    <%^ escaped_url_text %>
                    <%= escaped_html_text %>
                    <%= "<%% ignored %%>" %>
                    <%% ignored %%>
                <% } %>
                <br/>
                Stack :
                <br/>
                <% for !integer_stack.IsEmpty() { %>
                    <%# integer_stack.Pop() %>
                <% } %>
            </body>
        </html>
    #end
}

// ~~

func main()
{
    http.HandleFunc( "/", HandleRootPage );

    #if DebugMode
        WriteLine( "Listening on http://localhost:HttpPort" );
    #end

    log.Fatal(
        http.ListenAndServe( ":HttpPort", nil )
        );
}

Syntax

#define directive

Constants and generic code can be defined with the following syntax :

#define old code
#as new code

#define old code
#as
    new
    code
#end

#define
    old
    code
#as new code

#define
    old
    code
#as
    new
    code
#end

#define parameter

The #define directive can contain one or several parameters :

{{variable name}} : hierarchical code (with properly matching brackets and parentheses)
{{variable name#}} : statement code (hierarchical code without semicolon)
{{variable name$}} : plain code
{{variable name:boolean expression}} : conditional hierarchical code
{{variable name#:boolean expression}} : conditional statement code
{{variable name$:boolean expression}} : conditional plain code

They can have a boolean expression to require they match specific conditions :

HasText text
HasPrefix prefix
HasSuffix suffix
HasIdentifier text
false
true
!expression
expression && expression
expression || expression
( expression )

The #define directive must not start or end with a parameter.

#as parameter

The #as directive can use the value of the #define parameters :

{{variable name}}
{{variable name:filter function}}
{{variable name:filter function:filter function:...}}

Their value can be changed through one or several filter functions :

LowerCase
UpperCase
MinorCase
MajorCase
SnakeCase
PascalCase
CamelCase
RemoveComments
RemoveBlanks
PackStrings
PackIdentifiers
ReplacePrefix old_prefix new_prefix
ReplaceSuffix old_suffix new_suffix
ReplaceText old_text new_text
ReplaceIdentifier old_identifier new_identifier
AddPrefix prefix
AddSuffix suffix
RemovePrefix prefix
RemoveSuffix suffix
RemoveText text
RemoveIdentifier identifier

#if directive

Conditional code can be defined with the following syntax :

#if boolean expression
    #if boolean expression
        ...
    #else
        ...
    #end
#else
    #if boolean expression
        ...
    #else
        ...
    #end
#end

The boolean expression can use the following operators :

false
true
!expression
expression && expression
expression || expression
( expression )

#write directive

Templated HTML code can be sent to a stream writer using the following syntax :

#write writer expression
    <% code %>
    <%@ natural expression %>
    <%# integer expression %>
    <%& real expression %>
    <%~ text expression %>
    <%= escaped text expression %>
    <%! removed content %>
    <%% ignored tags %%>
#end

Limitations

• There is no operator precedence in boolean expressions.
• The --join option requires to end the statements with a semicolon.
• The #writer directive is only available for the Go language.

Installation

Install the DMD 2 compiler (using the MinGW setup option on Windows).

Build the executable with the following command line :

dmd -m64 generis.d

Command line

generis [options]

Options

--prefix # : set the command prefix
--parse INPUT_FOLDER/ : parse the definitions of the Generis files in the input folder
--process INPUT_FOLDER/ OUTPUT_FOLDER/ : reads the Generis files in the input folder and writes the processed files in the output folder
--trim : trim the HTML templates
--join : join the split statements
--create : create the output folders if needed
--watch : watch the Generis files for modifications
--pause 500 : time to wait before checking the Generis files again
--tabulation 4 : set the tabulation space count
--extension .go : generate files with this extension

Examples

generis --process GS/ GO/

Reads the Generis files in the GS/ folder and writes Go files in the GO/ folder.

generis --process GS/ GO/ --create

Reads the Generis files in the GS/ folder and writes Go files in the GO/ folder, creating the output folders if needed.

generis --process GS/ GO/ --create --watch

Reads the Generis files in the GS/ folder and writes Go files in the GO/ folder, creating the output folders if needed and watching the Generis files for modifications.

generis --process GS/ GO/ --trim --join --create --watch

Reads the Generis files in the GS/ folder and writes Go files in the GO/ folder, trimming the HTML templates, joining the split statements, creating the output folders if needed and watching the Generis files for modifications.

Version

2.0

Author: Senselogic
Source Code: https://github.com/senselogic/GENERIS 
License: View license

#go #golang #code 

10 Writing steps to create a good project brief - Mobile app development

Developing a mobile application can often be more challenging than it seems at first glance. Whether you’re a developer, UI designer, project lead or CEO of a mobile-based startup, writing good project briefs prior to development is pivotal. According to Tech Jury, 87% of smartphone users spend time exclusively on mobile apps, with 18-24-year-olds spending 66% of total digital time on mobile apps. Of that, 89% of the time is spent on just 18 apps depending on individual users’ preferences, making proper app planning crucial for success.

Today’s audiences know what they want and don’t want in their mobile apps, encouraging teams to carefully write their project plans before they approach development. But how do you properly write a mobile app development brief without sacrificing your vision and staying within the initial budget? Why should you do so in the first place? Let’s discuss that and more in greater detail.

Why a Good Mobile App Project Brief Matters?

It’s worth discussing the significance of mobile app project briefs before we tackle the writing process itself. In practice, a project brief is used as a reference tool for developers to remain focused on the client’s deliverables. Approaching the development process without written and approved documentation can lead to drastic, last-minute changes, misunderstanding, as well as a loss of resources and brand reputation.

For example, developing a mobile app that filters restaurants based on food type, such as Happy Cow, means that developers should stay focused on it. Knowing that such and such features, UI elements, and API are necessary will help team members collaborate better in order to meet certain expectations. Whether you develop an app under your brand’s banner or outsource coding and design services to would-be clients, briefs can provide you with several benefits:

• Clarity on what your mobile app project “is” and “isn’t” early in development
• Point of reference for developers, project leads, and clients throughout the cycle
• Smart allocation of available time and resources based on objective development criteria
• Streamlined project data storage for further app updates and iterations

Writing Steps to Create a Good Mobile App Project Brief

1. Establish the “You” Behind the App

Depending on how “open” your project is to the public, you will want to write a detailed section about who the developers are. Elements such as company name, address, project lead, project title, as well as contact information, should be included in this introductory segment. Regardless of whether you build an in-house app or outsource developers to a client, this section is used for easy document storage and access.

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Ways To Write A Good Dissertation

A dissertation is a research project undertaken as part of an undergraduate, postgraduate, or doctoral degree. The meaning of a professional dissertation is a research project that is original and well-documented undertaken in a study program. Therefore, a professional dissertation is also known as a thesis.

A dissertation is the most challenging part of student life, and it is rightly said that students writing a dissertation often have to live for the most amount of their days in libraries. It is natural for students to feel exhausted and want professional dissertation writing help through different channels.

How to Write a Good Dissertation?

A dissertation is essential as it allows the students to become the producers of knowledge rather than simply consuming it. The following are the ways on how to write a good dissertation:

1. Choose a topic: The topic is the first and most crucial component of writing a dissertation. You should carefully study various topics, analyze the literature on them, discuss them with your peers, potential supervisors and ponder over them at length before finalising any topic. A topic that is both interesting and feasible should be finally selected for the dissertation.
2. Define the title: A title that is specific and realistic should be chosen. The title should provide an overview of the whole dissertation by reading the title whether they want to read the entire paper.
3. Write a Dissertation Proposal: After finalizing the dissertation topic and title, the next step involves writing the dissertation proposal which is thoughtful and robust and makes a strong case for the dissertation topic and yourself.
4. Meeting with supervisor: Discuss your dissertation topic, methodology, and literature with your supervisor at length and note down the insights provided by them. An opportunity to connect with the supervisor personally is a huge benefit of doing a dissertation.
5. Plan and initiate data collection: You can either conduct primary research or secondary research, but whatever you choose, you should plan your data collection properly and collect it very systematically and carefully to avoid any pitfalls here.
6. Create a routine: Creating a routine and sticking to it regularly, completing minor goals within specific time frames, can allow you to regularly work on your dissertation without becoming a significant source of stress and enabling you to complete your dissertation on time.
7. Get feedback: Receiving regular feedback from your supervisor, other professors, and peers on your progress is a vital step to make sure that your dissertation is of high quality.
8. Analyse data: Analyse the data carefully and take help from your supervisor in doing so. Analysis of the data is a very complicated yet the most important process in a dissertation.
9. Draft and proofread: Complete writing your dissertation and keep proofreading it. Receive feedback from others and keep redrafting your dissertation until you reach the final level where there is minimal scope for improvement and you as well as your supervisor are satisfied with your dissertation.

Thus are a few tips on how to write a good dissertation. Many students doing their dissertation are often exhausted and face troubles relating to their dissertation and deadlines. Various services offer dissertation writing help in Australia. Proper analysis of such services should be done and only the best assignment help should be selected.
Dissertation

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