1673359452
Julia Wrapper Around Google's Gumbo C Library for Parsing HTML
Gumbo.jl
Gumbo.jl is a Julia wrapper around Google's gumbo library for parsing HTML.
Getting started is very easy:
julia> using Gumbo
julia> parsehtml("<h1> Hello, world! </h1>")
HTML Document:
<!DOCTYPE >
HTMLElement{:HTML}:
<HTML>
<head></head>
<body>
<h1>
Hello, world!
</h1>
</body>
</HTML>
Read on for further documentation.
Installation
using Pkg
Pkg.add("Gumbo")
or activate Pkg mode in the REPL by typing ], and then:
add Gumbo
Basic usage
The workhorse is the parsehtml function, which takes a single argument, a valid UTF8 string, which is interpreted as HTML data to be parsed, e.g.:
parsehtml("<h1> Hello, world! </h1>")
Parsing an HTML file named filenamecan be done using:
julia> parsehtml(read(filename, String))
The result of a call to parsehtml is an HTMLDocument, a type which has two fields: doctype, which is the doctype of the parsed document (this will be the empty string if no doctype is provided), and root, which is a reference to the HTMLElement that is the root of the document.
Note that gumbo is a very permissive HTML parser, designed to gracefully handle the insanity that passes for HTML out on the wild, wild web. It will return a valid HTML document for any input, doing all sorts of algorithmic gymnastics to twist what you give it into valid HTML.
If you want an HTML validator, this is probably not your library. That said, parsehtml does take an optional Bool keyword argument, strict which, if true, causes an InvalidHTMLError to be thrown if the call to the gumbo C library produces any errors.
HTML types
This library defines a number of types for representing HTML.
HTMLDocument
HTMlDocument is what is returned from a call to parsehtml it has a doctype field, which contains the doctype of the parsed document, and a root field, which is a reference to the root of the document.
HTMLNodes
A document contains a tree of HTML Nodes, which are represented as children of the HTMLNode abstract type. The first of these is HTMLElement.
HTMLElement
mutable struct HTMLElement{T} <: HTMLNode
children::Vector{HTMLNode}
parent::HTMLNode
attributes::Dict{String, String}
end
HTMLElement is probably the most interesting and frequently used type. An HTMLElement is parameterized by a symbol representing its tag. So an HTMLElement{:a} is a different type from an HTMLElement{:body}, etc. An empty HTMLElement of a given tag can be constructed as follows:
julia> HTMLElement(:div)
HTMLElement{:div}:
<div></div>
HTMLElements have a parent field, which refers to another HTMLNode. parent will always be an HTMLElement, unless the element has no parent (as is the case with the root of a document), in which case it will be a NullNode, a special type of HTMLNode which exists for just this purpose. Empty HTMLElements constructed as in the example above will also have a NullNode for a parent.
HTMLElements also have children, which is a vector of HTMLElement containing the children of this element, and attributes, which is a Dict mapping attribute names to values.
HTMLElements implement getindex, setindex!, and push!; indexing into or pushing onto an HTMLElement operates on its children array.
There are a number of convenience methods for working with HTMLElements:
tag(elem) get the tag of this element as a symbol
attrs(elem) return the attributes dict of this element
children(elem) return the children array of this element
getattr(elem, name) get the value of attribute name or raise a KeyError. Also supports being called with a default value (getattr(elem, name, default)) or function (getattr(f, elem, name)).
setattr!(elem, name, value) set the value of attribute name to value
HTMLText
type HTMLText <: HTMLNode
parent::HTMLNode
text::String
end
Represents text appearing in an HTML document. For example:
julia> doc = parsehtml("<h1> Hello, world! </h1>")
HTML Document:
<!DOCTYPE >
HTMLElement{:HTML}:
<HTML>
<head></head>
<body>
<h1>
Hello, world!
</h1>
</body>
</HTML>
julia> doc.root[2][1][1]
HTML Text: Hello, world!
This type is quite simple, just a reference to its parent and the actual text it represents (this is also accessible by a text function). You can construct HTMLText instances as follows:
julia> HTMLText("Example text")
HTML Text: Example text
Just as with HTMLElements, the parent of an instance so constructed will be a NullNode.
Tree traversal
Use the iterators defined in AbstractTrees.jl, e.g.:
julia> using AbstractTrees
julia> using Gumbo
julia> doc = parsehtml("""
<html>
<body>
<div>
<p></p> <a></a> <p></p>
</div>
<div>
<span></span>
</div>
</body>
</html>
""");
julia> for elem in PreOrderDFS(doc.root) println(tag(elem)) end
HTML
head
body
div
p
a
p
div
span
julia> for elem in PostOrderDFS(doc.root) println(tag(elem)) end
head
p
a
p
div
span
div
body
HTML
julia> for elem in StatelessBFS(doc.root) println(tag(elem)) end
HTML
head
body
div
div
p
a
p
span
julia>
TODOS
- support CDATA
- support comments
Download Details:
Author: JuliaWeb
Source Code: https://github.com/JuliaWeb/Gumbo.jl
License: View license
What is GEEK
Buddha Community
1673359452
Julia Wrapper Around Google's Gumbo C Library for Parsing HTML
Gumbo.jl
Gumbo.jl is a Julia wrapper around Google's gumbo library for parsing HTML.
Getting started is very easy:
julia> using Gumbo
julia> parsehtml("<h1> Hello, world! </h1>")
HTML Document:
<!DOCTYPE >
HTMLElement{:HTML}:
<HTML>
<head></head>
<body>
<h1>
Hello, world!
</h1>
</body>
</HTML>
Read on for further documentation.
Installation
using Pkg
Pkg.add("Gumbo")
or activate Pkg mode in the REPL by typing ], and then:
add Gumbo
Basic usage
The workhorse is the parsehtml function, which takes a single argument, a valid UTF8 string, which is interpreted as HTML data to be parsed, e.g.:
parsehtml("<h1> Hello, world! </h1>")
Parsing an HTML file named filenamecan be done using:
julia> parsehtml(read(filename, String))
The result of a call to parsehtml is an HTMLDocument, a type which has two fields: doctype, which is the doctype of the parsed document (this will be the empty string if no doctype is provided), and root, which is a reference to the HTMLElement that is the root of the document.
Note that gumbo is a very permissive HTML parser, designed to gracefully handle the insanity that passes for HTML out on the wild, wild web. It will return a valid HTML document for any input, doing all sorts of algorithmic gymnastics to twist what you give it into valid HTML.
If you want an HTML validator, this is probably not your library. That said, parsehtml does take an optional Bool keyword argument, strict which, if true, causes an InvalidHTMLError to be thrown if the call to the gumbo C library produces any errors.
HTML types
This library defines a number of types for representing HTML.
HTMLDocument
HTMlDocument is what is returned from a call to parsehtml it has a doctype field, which contains the doctype of the parsed document, and a root field, which is a reference to the root of the document.
HTMLNodes
A document contains a tree of HTML Nodes, which are represented as children of the HTMLNode abstract type. The first of these is HTMLElement.
HTMLElement
mutable struct HTMLElement{T} <: HTMLNode
children::Vector{HTMLNode}
parent::HTMLNode
attributes::Dict{String, String}
end
HTMLElement is probably the most interesting and frequently used type. An HTMLElement is parameterized by a symbol representing its tag. So an HTMLElement{:a} is a different type from an HTMLElement{:body}, etc. An empty HTMLElement of a given tag can be constructed as follows:
julia> HTMLElement(:div)
HTMLElement{:div}:
<div></div>
HTMLElements have a parent field, which refers to another HTMLNode. parent will always be an HTMLElement, unless the element has no parent (as is the case with the root of a document), in which case it will be a NullNode, a special type of HTMLNode which exists for just this purpose. Empty HTMLElements constructed as in the example above will also have a NullNode for a parent.
HTMLElements also have children, which is a vector of HTMLElement containing the children of this element, and attributes, which is a Dict mapping attribute names to values.
HTMLElements implement getindex, setindex!, and push!; indexing into or pushing onto an HTMLElement operates on its children array.
There are a number of convenience methods for working with HTMLElements:
tag(elem) get the tag of this element as a symbol
attrs(elem) return the attributes dict of this element
children(elem) return the children array of this element
getattr(elem, name) get the value of attribute name or raise a KeyError. Also supports being called with a default value (getattr(elem, name, default)) or function (getattr(f, elem, name)).
setattr!(elem, name, value) set the value of attribute name to value
HTMLText
type HTMLText <: HTMLNode
parent::HTMLNode
text::String
end
Represents text appearing in an HTML document. For example:
julia> doc = parsehtml("<h1> Hello, world! </h1>")
HTML Document:
<!DOCTYPE >
HTMLElement{:HTML}:
<HTML>
<head></head>
<body>
<h1>
Hello, world!
</h1>
</body>
</HTML>
julia> doc.root[2][1][1]
HTML Text: Hello, world!
This type is quite simple, just a reference to its parent and the actual text it represents (this is also accessible by a text function). You can construct HTMLText instances as follows:
julia> HTMLText("Example text")
HTML Text: Example text
Just as with HTMLElements, the parent of an instance so constructed will be a NullNode.
Tree traversal
Use the iterators defined in AbstractTrees.jl, e.g.:
julia> using AbstractTrees
julia> using Gumbo
julia> doc = parsehtml("""
<html>
<body>
<div>
<p></p> <a></a> <p></p>
</div>
<div>
<span></span>
</div>
</body>
</html>
""");
julia> for elem in PreOrderDFS(doc.root) println(tag(elem)) end
HTML
head
body
div
p
a
p
div
span
julia> for elem in PostOrderDFS(doc.root) println(tag(elem)) end
head
p
a
p
div
span
div
body
HTML
julia> for elem in StatelessBFS(doc.root) println(tag(elem)) end
HTML
head
body
div
div
p
a
p
span
julia>
TODOS
- support CDATA
- support comments
Download Details:
Author: JuliaWeb
Source Code: https://github.com/JuliaWeb/Gumbo.jl
License: View license
1619247660
Google's TPU's being primed for the Quantum Jump
The liquid-cooled Tensor Processing Units, built to slot into server racks, can deliver up to 100 petaflops of compute.
The liquid-cooled Tensor Processing Units, built to slot into server racks, can deliver up to 100 petaflops of compute.
As the world is gearing towards more automation and AI, the need for quantum computing has also grown exponentially. Quantum computing lies at the intersection of quantum physics and high-end computer technology, and in more than one way, hold the key to our AI-driven future.
Quantum computing requires state-of-the-art tools to perform high-end computing. This is where TPUs come in handy. TPUs or Tensor Processing Units are custom-built ASICs (Application Specific Integrated Circuits) to execute machine learning tasks efficiently. TPUs are specific hardware developed by Google for neural network machine learning, specially customised to Google’s Machine Learning software, Tensorflow.
The liquid-cooled Tensor Processing units, built to slot into server racks, can deliver up to 100 petaflops of compute. It powers Google products like Google Search, Gmail, Google Photos and Google Cloud AI APIs.
#opinions #alphabet #asics #floq #google #google alphabet #google quantum computing #google tensorflow #google tensorflow quantum #google tpu #google tpus #machine learning #quantum computer #quantum computing #quantum computing programming #quantum leap #sandbox #secret development #tensorflow #tpu #tpus
1595318322
Know Everything About HTML With HTML Experts
HTML stands for a hypertext markup language. For the designs to be displayed in web browser HTML is the markup language. Technologies like Cascading style sheets (CSS) and scripting languages such as JavaScript assist HTML. With the help of HTML websites and the web, designs are created. Html has a wide range of academic applications. HTML has a series of elements. HTML helps to display web content. Its elements tell the web how to display the contents.
The document component of HTML is known as an HTML element. HTML element helps in displaying the web pages. An HTML document is a mixture of text nodes and HTML elements.
Basics of HTML are-
The simple fundamental components oh HTML is
- Head- the setup information for the program and web pages is carried in the head
- Body- the actual substance that is to be shown on the web page is carried in the body
- HTML- information starts and ends with and labels.
- Comments- come up in between
Html versions timeline
- HTML was created in 1990. Html is a program that is updated regularly. the timeline for the HTML versions is
- HTML 2- November, 1995
- HTML 3- January, 1997
- HTML 4- December, 1997; April, 1998; December, 1999; May, 2000
- HTML 5- October, 2014; November, 2016; December, 2017
HTML draft version timelines are
- October 1991
- June 1992
- November 1992
- June 1993
- November 1993
- November 1994
- April 1995
- January 2008
- HTML 5-
2011, last call
2012 candidate recommendation
2014 proposed recommendation and recommendation
HTML helps in creating web pages. In web pages, there are texts, pictures, colouring schemes, tables, and a variety of other things. HTML allows all these on a web page.
There are a lot of attributes in HTML. It may get difficult to memorize these attributes. HTML is a tricky concept. Sometimes it gets difficult to find a single mistake that doesn’t let the web page function properly.
Many minor things are to be kept in mind in HTML. To complete an HTML assignment, it is always advisable to seek help from online experts. These experts are well trained and acknowledged with the subject. They provide quality content within the prescribed deadline. With several positive reviews, the online expert help for HTML assignment is highly recommended.
#html assignment help #html assignment writing help #online html assignment writing help #html assignment help service online #what is html #about html
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HTML Tutorial For Beginners
The prospect of learning HTML can seem confusing at first: where to begin, what to learn, the best ways to learn — it can be difficult to get started. In this article, we’ll explore the best ways for learning HTML to assist you on your programming journey.
What is HTML?
Hypertext Markup Language (HTML) is the standard markup language for documents meant to be displayed in a web browser. Along with Cascading Style Sheets (CSS) and JavaScript, HTML completes the trio of essential tools used in creating modern web documents.
HTML provides the structure of a webpage, from the header and footer sections to paragraphs of text, videos, and images. CSS allows you to set the visual properties of different HTML elements, like changing colors, setting the order of blocks on the screen, and defining which elements to display. JavaScript automates changes to HTML and CSS, for example, making the font larger in a paragraph when a user clicks a button on the page.
#html #html-css #html-fundamentals #learning-html #html-css-basics #html-templates
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HTML - A Complete Guide to Master the Top Programming Language
In this era of technology, anything digital holds a prime significance in our day-to-day life. Hence, developers have submerged themselves to create a major impact using programming languages.According to Statista, HTML/CSS holds the second position (the first being Javascript), in the list of most widely-used programming languages globally (2020).Interested to learn this language? Then head on to this tutorial and get to know all about HTML! Plus we have added numerous examples such that you can learn better! So happy learning!
html for beginners
#html #html-for-beginners #html-tutorials #introduction-to-html #learn-html #tutorials-html