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Modifying Text Nodes in JavaScript

by rajeshkumarAugust 9, 2021April 13, 2022JavaScriptLeave a Comment

Properties

Data
Length

Methods

appendData(String)
deleteData(start, length)
insertData(start, string)
replaceData(start, length, string)
splitText(start)
substringData(start, length)

Length

Length property is used to access the length of Text which indicates the number of characters it contains.

Syntax:- TextNode.length

Data

Data property is used to set or return the value of a text node and comment node objects.

Syntax: –
Sets
TextNode.data = value
Returns
TextNode.data

Ex:- TextNode.data = “Hello DevOpsSchool”;

appendData(String)

This method is used to append the passed string to the end of the text node and comment node.

Syntax: –
TextNode.appendData(String);

Ex: –
TextNode.appendData(“Hello DevOpsSchool”);

deleteData(start, length)

This method is used to delete or remove text content from a text node and comment node. It deletes the specified length of characters starting from index defined in start.

Syntax:-
TextNode.deleteData(start, length);

Ex: –
TextNode.deleteData(0, 5);

insertData(start, string)

This method is used to insert text content to text node and comment node. It inserts the value in string, starting at the character index specified in start.

Syntax:-
TextNode.insertData(start, string)

Ex: –
TextNode.insertData(3, “Hello”)

replaceData(start, length, string)

This method is used to replace text content of text node and comment node. It inserts the value in string, starting at the character index specified in start.

Syntax:-
TextNode.replaceData(start, length, string)

Ex: –
TextNode.replaceData(0, 4, “Hello”)

splitText(start)

The splitText(start) method breaks the Text node into two nodes at the specified start index, keeping both nodes in the tree as siblings. It returns right side of the split in a new text node and leaves the left side in the original.

Syntax: –
var rightSide = TextNode.splitText(start)

Ex: –
var rightSide = TextNode.splitText(5)

substringData(start, length)

It returns the part of the current element’s (TextNode and CommentNode) text content from the specified position with the specified length.

Syntax:-
TextNode.substringData(start, length)

Ex: –
TextNode.substringData(2, 5);

Which String Functions are present in String?

by Ashwani KumarAugust 7, 2021August 7, 2021phpLeave a Comment

addcslashes — Quote string with slashes in a C style
addslashes — Quote string with slashes
bin2hex — Convert binary data into hexadecimal representation
chop — Alias of rtrim
chr — Return a specific character
chunk_split — Split a string into smaller chunks
convert_cyr_string — Convert from one Cyrillic character set to another
convert_uudecode — Decode a uuencoded string
convert_uuencode — Uuencode a string
count_chars — Return information about characters used in a string
crc32 — Calculates the crc32 polynomial of a string
crypt — One-way string hashing
echo — Output one or more strings
explode — Split a string by string
fprintf — Write a formatted string to a stream
get_html_translation_table — Returns the translation table used by htmlspecialchars and htmlentities
hebrev — Convert logical Hebrew text to visual text
hebrevc — Convert logical Hebrew text to visual text with newline conversion
hex2bin — Decodes a hexadecimally encoded binary string
html_entity_decode — Convert all HTML entities to their applicable characters
htmlentities — Convert all applicable characters to HTML entities
htmlspecialchars_decode — Convert special HTML entities back to characters
htmlspecialchars — Convert special characters to HTML entities
implode — Join array elements with a string
join — Alias of implode
lcfirst — Make a string’s first character lowercase
levenshtein — Calculate Levenshtein distance between two strings
localeconv — Get numeric formatting information
ltrim — Strip whitespace (or other characters) from the beginning of a string
md5_file — Calculates the md5 hash of a given file
md5 — Calculate the md5 hash of a string
metaphone — Calculate the metaphone key of a string
money_format — Formats a number as a currency string
nl_langinfo — Query language and locale information
nl2br — Inserts HTML line breaks before all newlines in a string
number_format — Format a number with grouped thousands
ord — Return ASCII value of character
parse_str — Parses the string into variables
print — Output a string
printf — Output a formatted string
quoted_printable_decode — Convert a quoted-printable string to an 8 bit string
quoted_printable_encode — Convert a 8 bit string to a quoted-printable string
quotemeta — Quote meta characters
rtrim — Strip whitespace (or other characters) from the end of a string
setlocale — Set locale information
sha1_file — Calculate the sha1 hash of a file
sha1 — Calculate the sha1 hash of a string
similar_text — Calculate the similarity between two strings
soundex — Calculate the soundex key of a string
sprintf — Return a formatted string
sscanf — Parses input from a string according to a format
str_getcsv — Parse a CSV string into an array
str_ireplace — Case-insensitive version of str_replace.
str_pad — Pad a string to a certain length with another string
str_repeat — Repeat a string
str_replace — Replace all occurrences of the search string with the replacement string
str_rot13 — Perform the rot13 transform on a string
str_shuffle — Randomly shuffles a string
str_split — Convert a string to an array
str_word_count — Return information about words used in a string
strcasecmp — Binary safe case-insensitive string comparison
strchr — Alias of strstr
strcmp — Binary safe string comparison
strcoll — Locale based string comparison
strcspn — Find length of initial segment not matching mask
strip_tags — Strip HTML and PHP tags from a string
stripcslashes — Un-quote string quoted with addcslashes
stripos — Find the position of the first occurrence of a case-insensitive substring in a string
stripslashes — Un-quotes a quoted string
stristr — Case-insensitive strstr
strlen — Get string length
strnatcasecmp — Case insensitive string comparisons using a “natural order” algorithm
strnatcmp — String comparisons using a “natural order” algorithm
strncasecmp — Binary safe case-insensitive string comparison of the first n characters
strncmp — Binary safe string comparison of the first n characters
strpbrk — Search a string for any of a set of characters
strpos — Find the position of the first occurrence of a substring in a string
strrchr — Find the last occurrence of a character in a string
strrev — Reverse a string
strripos — Find the position of the last occurrence of a case-insensitive substring in a string
strrpos — Find the position of the last occurrence of a substring in a string
strspn — Finds the length of the initial segment of a string consisting entirely of characters contained within a given mask.
strstr — Find the first occurrence of a string
strtok — Tokenize string
strtolower — Make a string lowercase
strtoupper — Make a string uppercase
strtr — Translate characters or replace substrings
substr_compare — Binary safe comparison of two strings from an offset, up to length characters
substr_count — Count the number of substring occurrences
substr_replace — Replace text within a portion of a string
substr — Return part of a string
trim — Strip whitespace (or other characters) from the beginning and end of a string
ucfirst — Make a string’s first character uppercase
ucwords — Uppercase the first character of each word in a string
vfprintf — Write a formatted string to a stream
vprintf — Output a formatted string
vsprintf — Return a formatted string
wordwrap — Wraps a string to a given number of characters

Tagged : Php / php string / php String operators / String / String Functions / String Functions are present in String / String in PHP / String operators / Which String Functions are present in String

Tutorial for Double Quoted String

by Ashwani KumarAugust 6, 2021August 6, 2021phpLeave a Comment

What is Double Quoted string?

In PHP, we can also define a string by wrapping it in a double quote. However, double quote PHP strings will be used to evaluate escape sequences and variables.

How to Create Strings Using Double Quoted with Example.

When compared to single quotes, double quotes are utilised to build more complicated strings.

Variable names can be enclosed in double quotations, and the values of those variables will be displayed.

Consider the following scenario.

Example 1:-

Output:–

Hello text within double quote

Example 2:-

Output:–

Parse error: syntax error, unexpected 'quote' (T_STRING) in C:\wamp\www\string1.php on line 2

Example 3:-

Output:–

Hello text multiple line text within double quoted string 
Using double "quote" with backslash inside double quoted string 
Using escape sequences in double quoted string

Example 4:-

Output:–

Number is: 10

Tagged : Create Strings Using Double Quoted / Double Quoted / Double Quoted String / How to Create Strings Using Double Quoted / Php / String / Tutorial for Double Quoted String / What is Double Quoted string

Tutorial for Single Quoted String

by Ashwani KumarAugust 6, 2021August 6, 2021phpLeave a Comment

What is Single Quoted string?

In PHP, we can make a string by surrounding the content in a single quotation mark. In PHP, it is the simplest way to specify a string.

Escape a literal single quote with a backslash (), and use double backslash to specify a literal backslash (). (\). All other backslash characters, such as r and n, will be output as they are instead of having any special meaning.

How to Create Strings Using Single quotes with Example.

Let’s have a look at the four alternative approaches to writing PHP string functions and manipulating strings in PHP.

Using Single Quotes to Build PHP Strings: The simplest approach to create a string is to use single quotes.

Let’s have a look at a PHP example that generates a simple string.

Example 1:-

Output:–

Hello text within single quote

Example 2:-

Output:–

Hello text multiple line text within single quoted string 
Using double "quote" directly inside single quoted string 
Using escape sequences \n in single quoted string

Example 3:-

Output:–

trying variable $num1 
trying backslash n and backslash t inside single quoted string \n \t 
Using single quote 'my quote' and \backslash

Tagged : How to Create Strings Using Single quotes / Php / Single Quoted / Single Quoted String / String / What / What is Single Quoted string

Complete tutorial for String in PHP

by Ashwani KumarAugust 6, 2021August 6, 2021phpLeave a Comment

What is String?

A PHP string is a collection of characters that can be used to save and manipulate text. PHP only supports a 256-character set, hence it doesn’t support Unicode natively.

The term “string” refers to a group of characters. PHP supports a number of data types, including strings.

Alphanumeric characters are allowed in string variables. When these conditions are met, strings are generated.

You create a variable and assign it to string characters.
With the echo statement, you can use PHP Strings directly.
String functions in PHP are language constructs that aid in the capturing of words.
Understanding how PHP strings work and manipulating them can help you become a more successful and productive developer.

In PHP, there are four different ways to specify a string literal.

single quoted
double quoted
heredoc syntax
newdoc syntax (since PHP 5.3)

Tagged : Php / String / String in PHP / Tutorial / What / What is String / What is String operators

How many data types How to work are there in JavaScript?

by rajeshkumarAugust 5, 2021April 13, 2022JavaScriptLeave a Comment

Boolean

Boolean is the built-in object corresponding to the primitive Boolean data type. JavaScript boolean can have one of two values: true or false.

Primitive Values
var primitiveTrue = true;
var primitiveFalse = false;

Boolean Function
var functionTrue = Boolean(true);
var functionFalse = Boolean(flase);

Boolean Constructor
var constructorTrue = new Boolean(true);
var constructorFalse = new Boolean(false);

Boolean

If value parameter is omitted or is 0, -0, null, false, NaN, undefined, or the empty string (“”), the object has an initial value of false.

String

A string is a built-in object corresponding to the primitive string data type.
A string is a group of characters.

String

Primitive
var str = “Hello DevopsSchool”;——————————
var str = „Hello DevopsSchool‟; ——————————String
var str = Hello DevopsSchool;—————————–

Constructor
var str = new String (“Hello DevopsSchool”);——————————
var str = new String („Hello DevopsSchool‟); —————————– Object
var str = new String (Hello DevopsSchool);—————————–

Accessing String

Access String

String Concatenation

Concat Operator

Template Literal/ Template Strings

Template literals are string literals allowing embedded expressions. You can
use multi-line strings and string interpolation features with them.
Template literals are enclosed by the back-tick () character instead of double
or single quotes.

Multiple Line String

String Interpolation

Template literals can contain placeholders. These are indicated by the dollar sign and curly braces
(${expression})

String Methods

charAt ( )
charCodeAt( )
toUpperCase( )
toLowerCase ( )
Trim( )
Replace ( )
Split ( )
indexOf( )
Search ( )
Slice ( )
Substring( )
Substr ()

Tagged : Accessing String / Boolean / data types / Javascript / String

List of keywords and reserved words in JavaScript

by rajeshkumarJuly 22, 2021April 13, 2022JavaScriptLeave a Comment

Keyword or Reserved words

var	delete	for	let	brack
super	void	case	do	static
function	new	switch	while	interface
catch	else	if	package	finally
this	with	class	enum	default
implements	private	throw	tiled	typeof
const	export	import	protected	return
true	continue	extends	in
instanceof
public	try	debugger	false

In JavaScript, we do not need to specify the type of the variable because it is dynamically used by the JavaScript engine.
We can use var data type. It can hold any type of data like String, Number, Boolean, etc.

Primitive Data Type Non-Primitive Data type

String Object
Number Array
Boolean RegExp
Undefine

Tagged : Javascript / Keywords / reserved words / String / Variables

String manipulation exercise

by scmgalaxy KDecember 8, 2017February 27, 2021Shell ScriptLeave a Comment

mnanjala created the topic: String manipulation exercise

Hi Guys,

Say there is a text file inject.dat, it has 5 entries as below
PKGNAME=Project-debug
OLD_VERSION=1.0.0
NEW_VERSION=1.0.1
PRODUCT NUMBER=1
RELASE DATE=11/11/2011

How we could write shell script so I can read each line replace everything after “=”sign, with new value, example run
./inject.sh $PKGNAME $OLD_VERSION $NEW_VERSION $PRODUCT_NUMBER $RELEASE_DATE , so it should update the inject.dat with newer value what ever I give as parameter? Any idea?

Hint getopts.

rajeshkumar replied the topic: Re: String manipulation exercise
Hi praveen,

getopts is the best way to implement. I could not get much time to look into it. However, please find my quick code to implement the same. Please change the file name as needed. if time permits, tomorrow i will tell you more better way.

for line in $(< raj.txt) do if [ $# -eq 5 ] then case $line in PKGNAME=$1) eval $line ;; OLD_VERSION=$2) eval $line ;; NEW_VERSION=$3) eval $line ;; PRODUCT_NUMBER=$4) eval $line ;; RELASE_DATE=$5) eval $line ;; *) ;; esac fi done echo PKGNAME=$1 >> temp.txt echo OLD_VERSION=$2 >> temp.txt echo NEW_VERSION=$3 >> temp.txt echo PRODUCT_NUMBER=$4 >> temp.txt echo RELASE_DATE=$5 >> temp.txt

mv temp.txt raj2.txt

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

Tagged : String