The document describes various XPath axes and functions. It defines several axes including the child, descendant, ancestor, following, and attribute axes. It provides examples of how to select nodes using these different axes. It also defines several functions for the core function library including id, last, local-name, name, and position. The functions operate on node-sets and return numbers, strings, Booleans, and other values.
PYTHON-Chapter 3-Classes and Object-oriented Programming: MAULIK BORSANIYAMaulik Borsaniya
Classes and Object-oriented Programming:
Classes: Creating a Class, The Self Variable, Constructor, Types of Variables, Namespaces, Types of Methods (Instance Methods, Class Methods, Static Methods), Passing Members of One Class to Another Class, Inner Classes
Inheritance and Polymorphism: Constructors in Inheritance, Overriding Super Class Constructors and Methods, The super() Method, Types of Inheritance, Single Inheritance, Multiple Inheritance, Method Resolution Order (MRO), Polymorphism, Duck Typing Philosophy of Python, Operator Overloading, Method Overloading, Method Overriding
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The slides for a lecture about the Ruby programming language. This language was given at FEUP, on a course called "Laboratories of Object-Oriented Programming".
Contents :
Language Concepts
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NSInteger
NSNumber
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PYTHON-Chapter 3-Classes and Object-oriented Programming: MAULIK BORSANIYAMaulik Borsaniya
Classes and Object-oriented Programming:
Classes: Creating a Class, The Self Variable, Constructor, Types of Variables, Namespaces, Types of Methods (Instance Methods, Class Methods, Static Methods), Passing Members of One Class to Another Class, Inner Classes
Inheritance and Polymorphism: Constructors in Inheritance, Overriding Super Class Constructors and Methods, The super() Method, Types of Inheritance, Single Inheritance, Multiple Inheritance, Method Resolution Order (MRO), Polymorphism, Duck Typing Philosophy of Python, Operator Overloading, Method Overloading, Method Overriding
Abstract Classes and Interfaces: Abstract Method and Abstract Class, Interfaces in Python, Abstract Classes vs. Interfaces,
Object oriented programming with pythonArslan Arshad
A short intro to how Object Oriented Paradigm work in Python Programming language. This presentation created for beginner like bachelor student of Computer Science.
The slides for a lecture about the Ruby programming language. This language was given at FEUP, on a course called "Laboratories of Object-Oriented Programming".
Contents :
Language Concepts
How Objective C works- Basics
Data Types
NSInteger
NSNumber
Operators
Loop
Inheritance
Method Overloading
Mutable and Immutable Strings
Mutable and Immutable Arrays
File Management
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1% of reading value effectively ensures the accuracy of test results
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What is Xplocial? | How to Earn a 6 Figure Income in 6 Weeks!Jason Howard
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The Xplocial Compensation Plan is Amazing, but if you're thinking about joining Xplocial, you should join a winning team. We are the Platinum 200 team headed by multiple 6 Figure earners in Xplocial. Join Forces with us and get access to the best mentors in the business. This is the official Xplocial Presentation.
http://www.GetXplocial.com
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Empowered development teams are the backbone of the agile development idea.
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PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
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- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
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By Design, not by Accident - Agile Venture Bolzano 2024
Xml Path Language1.0
1. ?? /descendant::figure[position()=42] selects the forty-second figure
HORIZONTAL AXIS Examples:
?? child::para selects the para element children of the context node element in the document [//figure[position()=42]]
attribute
[para] descendant-or-self
?? child::* selects all element children of the context node [*]
The attribute axis contains the attributes of the context node; the axis will
The descendant-or-self axis contains the context node and the
?? child::text() selects all text node children of the context node
be empty unless the context node is an element.
descendants of the context node.
Examples: [text()]
Example:
?? attribute::name selects the name attribute of the context node ?? child::node() selects all the children of the context node, whatever
?? descendant-or-self::para selects the para element descendants of
[@name] their node type
the context node and, if the context node is a para element, the
?? attribute::* selects all the attributes of the context node [@*] ?? child::chapter/descendant::para selects the para element
context node as well
descendants of the chapter element children of the context node
following
parent
[chapter//para]
The following axis contains all nodes in the same document as the ?? child::*/child::para selects all para grandchildren of the context The parent axis contains the parent of the context node, if there is one.
context node that are after the context node in document order, excluding node [*/para] Example:
any descendants and excluding attribute nodes and namespace nodes.
?? child::para[position()=1] selects the first para child of the context ?? parent:: select the parent element [..]
following-sibling node [para[position()=1]] ?? / selects the document root (which is always the parent of the
?? child::para[position()=last()] selects the last para child of the
The following-sibling axis contains all the following siblings of the document element) [//]
context node [para[position()=last()]]
context node; if the context node is an attribute node or namespace node, self
?? child::para[position()=last()-1] selects the last but one para child of
the following-sibling axis is empty.
The self axis contains just the context node itself.
the context node [para[position()=last()-1]]
Example:
?? child::para[position()>1] selects all the para children of the context Example:
?? following-sibling::chapter[position()=1] selects the next chapter
?? self::para selects the context node if it is a para element, and
node other than the first para child of the context node
sibling of the context node
otherwise selects nothing [.]
[para[position()>1]]
namespace
?? /child::doc/child::chapter[position()=5]/child::section[position()
NODE SET FUNCTIONS
The namespace axis contains the namespace nodes of the context node; =2] selects the second section of the fifth chapter of the doc
the axis will be empty unless the context node is an element. number count(node-set?) § 4.1
document element [/doc/chapter[5]/section[2]]
?? child::para[attribute::type=quot;warningquot;] selects all para children
preceding
The count function returns the number of nodes in the argument node-
of the context node that have a type attribute with value warning
The preceding axis contains all nodes in the same document as the set.
[para[@type=quot;warningquot;]]
context node that are before the context node in document order, node-set id(object) § 4.1
?? child::para[attribute::type='warning'][position()=5] selects the
excluding any ancestors and excluding attribute nodes and namespace
fifth para child of the context node that has a type attribute with The id function selects elements by their unique ID.
nodes.
value warning [para[@type=quot;warningquot;][5]]
number last() § 4.1
preceding-sibling ?? child::para[position()=5][attribute::type=quot;warningquot;] selects the
The last function returns a number equal to the context size from the
fifth para child of the context node if that child has a type attribute
The preceding-sibling axis contains all the preceding siblings of the
expression evaluation context.
with value warning [para[5] [@type=quot;warningquot;]]
context node; if the context node is an attribute node or namespace node,
?? child::chapter[child::title='Introduction'] selects the chapter string local-name(node-set?) § 4.1
the preceding-sibling axis is empty.
children of the context node that have one or more title children with
Example:
The local-name function returns the local part of the expanded-name of
?? preceding-sibling::chapter[position()=1] selects the previous string-value equal to Introduction [chapter[title=quot;Introductionquot;]]
the node in the argument node-set that is first in document order.
?? child::chapter[child::title] selects the chapter children of the
chapter sibling of the context node
string name(node-set?) § 4.1
context node that have one or more title children [chapter[title]]
VERTICAL AXIS ?? child::*[self::chapter or self::appendix] selects the chapter and The name function returns a string containing a QName representing the
appendix children of the context node [chapter|children]
ancestor expanded-name of the node in the argument node-set that is first in
?? child::*[self::chapter or self::appendix][position()=last()] selects document order.
The ancestor axis contains the ancestors of the context node; the the last chapter or appendix child of the context node string namespace-uri(node-set?) § 4.1
ancestors of the context node consist of the parent of context node and [[chapter|appendix][position()=last()]]
the parent's parent and so on; thus, the ancestor axis will always include The namespace-uri function returns the namespace URI of the expanded-
descendant
the root node, unless the context node is the root node. name of the node in the argument node-set that is first in document
Example: The descendant axis contains the descendants of the context node; a order.
?? ancestor::div selects all div ancestors of the context node descendant is a child or a child of a child and so on; thus the descendant
number position() § 4.1
axis never contains attribute or namespace nodes.
ancestor-or-self
The position function returns a number equal to the context position from
Example:
?? descendant::para selects the para element descendants of the
The ancestor-or-self axis contains the context node and the ancestors of the expression evaluation context.
the context node; thus, the ancestor axis will always include the root context node [.//para]
STRING FUNCTIONS
node. ?? /descendant::para selects all the para elements in the same
Example: string concat(string, string, string*) § 4.2
document as the context node [//para]
?? ancestor-or-self::div selects the div ancestors of the context node ?? /descendant::olist/child::item selects all the item elements that
The concat function returns the concatenation of its arguments.
and, if the context node is a div element, the context node as well have an olist parent and that are in the same document as the context
child node [//olist/item]
The child axis contains the children of the context node.
2. ?? an object of a type other than the four basic types is converted to a
boolean contains(string, string) § 4.2
boolean in a way that is dependent on that type.
The contains function returns true if the first argument string contains the
boolean false() § 4.3
second argument string, and otherwise returns false.
string normalize-space(string?) § 4.2 The false function returns false.
boolean lang(string) § 4.3
The normalize-space function returns the argument string with
whitespace normalized by stripping leading and trailing whitespace and The lang function returns true or false depending on whether the
replacing sequences of whitespace characters by a single space. language of the context node as specified by xml:lang attributes is the
Quick Reference
boolean starts-with(string, string) § 4.2 same as or is a sublanguage of the language specified by the argument
string.
The starts-with function returns true if the first argument string starts
boolean not(boolean) § 4.3
with the second argument string, and otherwise returns false.
string string(object?) § 4.2 The not function returns true if its argument is false, and false otherwise.
XML Path Language
boolean true() § 4.3
The string function converts an object to a string:
?? NaN is converted to the string NaN, The true function returns true.
?? positive zero is converted to the string 0,
(XPath)
NUMBER FUNCTIONS
?? negative zero is converted to the string 0,
?? positive infinity is converted to the string Infinity, Version 1.0
number ceiling(number) § 4.4
?? negative infinity is converted to the string –Infinity,
?? if the number is an integer, the number is represented in decimal The ceiling function returns the smallest (closest to negative infinity)
number that is not less than the argument and that is an integer.
form as a Number with no decimal point and no leading zeros,
W3C Recommendation
number floor(number) § 4.4
preceded by a minus sign (-) if the number is negative,
16 November 1999
?? otherwise, the number is represented in decimal form as a Number
The floor function returns the largest (closest to positive infinity) number
including a decimal point with at least one digit before the decimal
that is not greater than the argument and that is an integer.
point and at least one digit after the decimal point, preceded by a
number number(object?) § 4.4
minus sign (-) if the number is negative.
http://www.w3.org/TR/xpath/
number string-length(string?) § 4.2 The number function converts its argument to a number:
a string that consists of optional whitespace followed by an optional
The string-length returns the number of characters in the string
minus sign followed by a Number followed by whitespace is converted
string substring(string, number, number?) § 4.2 to the IEEE 754 number that is nearest (according to the IEEE 754 Table of Contents:
round-to-nearest rule) to the mathematical value represented by the
The substring function returns the substring of the first argument starting
Location Paths
string; any other string is converted to NaN,
at the position specified in the second argument with length specified in
· Horizontal Axis
?? boolean true is converted to 1; boolean false is converted to 0,
the third argument.
· Vertical Axis
?? a node-set is first converted to a string as if by a call to the string
string substring-after(string, string) § 4.2
function and then converted in the same way as a string argument,
Core Function Library
?? an object of a type other than the four basic types is converted to a
The substring-after function returns the substring of the first argument
· Node Set Functions
string that follows the first occurrence of the second argument string in number in a way that is dependent on that type.
· String Functions
the first argument string, or the empty string if the first argument string
number round(number) § 4.4
· Boolean Functions
does not contain the second argument string.
· Number Functions
The round function returns the number that is closest to the argument and
string substring-before(string, string) § 4.2
that is an integer.
The substring-before function returns the substring of the first argument
number sum(node-set) § 4.4
string that precedes the first occurrence of the second argument string in
The sum function returns the sum, for each node in the argument node-
the first argument string, or the empty string if the first argument string
set, of the result of converting the string-values of the node to a number.
does not contain the second argument string.
string translate(string, string, string) § 4.2
The translate function returns the first argument string with occurrences
of characters in the second argument string replaced by the character at
the corresponding position in the third argument string.
BOOLEAN FUNCTIONS
deepX Ltd.
boolean boolean(object) § 4.3
Dublin, Ireland
The boolean function converts its argument to a Boolean:
?? a number is true if and only if it is neither positive or negative zero
info@deepX.com
nor NaN,
http://www.deepX.com/
?? a node-set is true if and only if it is non-empty,
?? a string is true if and only if its length is non-zero,