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Use of string

Source: Internet
Author: User
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Common Methods of string

Method

Description

Anchor ()

Create an HTML anchor

Concat ()

Connect strings

Indexof ()

Find the location where the character appears

Lastindexof ()

Find the last character

Charat ()

Returns the characters at the specified position.

Substring ()

Truncate string

Substr ()

Truncate string

Spilt ()

Split string

Tolowercase ()

Converts a string to lowercase letters.

Touppercase ()

Converts a string to uppercase or lowercase letters.

Sub ()

Returns the string as a subscript.

Sup ()

Display the string as a supermark

 

 

<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
<Title> untitled document </title>
<SCRIPT type = "text/JavaScript" Language = "JavaScript">
/************ Create a String object ***********/
// Create a String object (method 1)
// Var STR = "Hello World ";
// Create a String object (method 1)
// Var STR = new string ("Hello World ");
 
/*********** Common methods for string objects ***************/
VaR STR = "Hello World ";
// Indexof is used to find the index location of the first occurrence of the substring. If no index is found,-1 is returned.
// Document. Write (Str. indexof ("O", 0); // output 4
// Document. Write (Str. indexof ("O", 5); // output 7
// Lastindexof is used to find the final position of the specified sub-string. If no result is found,-1 is returned. (Note: This method is used to search from the front of the string, the second parameter indicates the index location to start searching)
// Document. Write (Str. lastindexof ('O', str. Length ));
/********* Substring and substr *********************/

VaR STR = "Hello World ";
// Parameter 1: subscripts to be intercepted. Parameter 2: the number of characters to be truncated.
Document. Write (Str. substring (1, 3); // output el
Document. Write ("<br> ");
// Parameter 1: subscripts to be captured; parameter 2: number of characters to be truncated
Document. Write (Str. substr (1, 3 ));
Document. Write ("<br> ");
Document. Write (Str. Length); // The length of the output string

</SCRIPT>

</Head>

<Body>

</Body>

</Html>

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