javascript string concatenation vs

I recently read the book "Javascript advanced programming" and found some useful skills and knowledge that I have never touched before. I want to record it through my blog to deepen my memory. The subString () method and slice () method in the String class are described in section 2.8.4 of this book. The method and return result are basically the same, as shown in the following example: The Code is as fol

This article is to share with you the use of Javascript to calculate the string in localStorage in the number of characters, respectively on the UTF-8 and UTF-16 two encoding are described in detail, there is a need for small partners can refer. Recently, the project has a requirement to use js to calculate the memory occupied by writing a string to localStorage.

This article mainly introduces how JavaScript uses encodeURI () and decodeURI () to obtain string values. The example shows how to parse strings using the encodeURI () and decodeURI () functions, for more information about how to obtain string values by using encodeURI () and decodeURI () in JavaScript, see the followi

The following code has a good idea without considering the running efficiency. But in actual applications, we still use split or join to implement Array Operations. Two custom js functions that implement mutual conversion between strings and arrays hope to be useful to you: The Code is as follows: Function StringToArray (str, substr ){/* Function: Splits a string into an Array Based on the specified string.Parameters:Str:

The String "adadfdfseffserfefsefseetsdg" is used to find the most frequently used letters and the number of times. The typical solution is to retrieve the first character (first letter) of a string, and replace the regular expression (first character) with the replacement of null, the number of occurrences of this letter is the original string length minus the re

The JavaScript file only fails under IE6 ("unended String constant. It mentioned that "DOM is the UTF-8 of the article code, if the JS library is not separated from the independent JS file, but included in the DOM, this problem will not appear. However, the separated JS file is not UTF-8 encoding, is added to the DOM library of UTF-8 encoding, Chinese appears garbled characters, and affect the quotation mar

The JavaScript file only fails under IE6 ("unended String constant. It mentioned that "DOM is the UTF-8 of the article code, if the JS library is not separated from the independent JS file, but included in the DOM, this problem will not appear. However, the separated JS file is not UTF-8 encoding, is added to the DOM library of UTF-8 encoding, Chinese appears garbled characters, and affect the quotation mar

This article mainly introduces the methods for parsing XML documents and XML strings using javascript and the specific code. If you need it, you can refer to it. I have written a link to "using jquery to parse XML" at http://www.jb51.net/article/54842.htm. the previous article details the method for converting jquery and strings. Here I will focus on javascript to operate xml. The Code is as follows: Var

": -,"Info": {"Tel":"123456","Cellphone":"98765"},"Address": [ {"City":"Beijing","Postcode":"222333"}, {"City":"NewYork","Postcode":"555666"}]} alert (user. Username); Alert (user. Age); Alert (user. Info. Cellphone); Alert (user. Address[0]. City); Alert (user. Address[0]. Postcode); User. Username="Tom"; Alert (user. Username); }JSON provides a json.js package that, after downloading Http://www.json.org/json.js, introduces it and then simply converts it to JSON data using object.tojsonstring (

compare the effect of using "+" to splice strings in different browsers. There are many such comparisons on the Internet. Many cool people say that using the join method of Array in js to concatenate strings is very good. To this end, write a js class in the project to uniformly process String concatenation. Code // A custom string connection class for concaten