js handles common operations such as json and string comparison

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js handles common operations such as json and string comparison_javascript skills

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May 16, 2016 pm 05:23 PM

String comparison

js handles common operations such as insertion, modification, deletion of json format, and comparison of strings

demo 1:
Insertion and deletion of json format

Copy code The code is as follows:

Running result:

js handles common operations such as json and string comparison_javascript skills

demo2:

Copy code The code is as follows:

< ;input type="button" value=">" onclick="toRight();submit()"/>

Run results:

Demo 3:

Insertion, modification, deletion of json elements, and conversion format to string

Copy code The code is as follows:

IT-Homer demo< ;/title> </head> <body> <input type="button" id="parse" value="parse json" onclick="parseJson() " /> <div id="txt" /> <script type="text/javascript"> function parseJson(){ var txt = document.getElementById("txt"); var jsonData = '{"name":"it-homer","age":25}'; var field = ""; if(jsonData.length <= 0){ jsonData = '{}'; } var jsonObj = JSON.parse(jsonData); // ok // var jsonObj = eval('(' jsonData ')'); // ok // var jsonObj = jsonData.parseJSON(); // error field = "name = " jsonObj.name; field = ", age = " jsonObj.age; jsonObj["sex"] = "boy"; // add json, {"name":"it-homer","age": 25,"sex":"boy"} // createJson(jsonObj, "sex", "boy"); jsonData = JSON.stringify(jsonObj); // ok / / jsonData = jsonObj.toJSONString(); // error var sex = ""; if(jsonObj.length > 0) { sex = jsonObj.sex; } txt.innerHTML = field "" jsonData; } function createJson(jsonObj, key, value){ if(typeof value === "undefined"){ delete jsonObj[key]; } else { jsonObj[key] = value; } } </script> < ;/body> </html> </div> Run results: <img src="/static/imghw/default1.png" data-src="http://files.jb51.net/file_images/article/201309/2013090816014516.gif?20138816156" class="lazy" alt="js handles common operations such as json and string comparison_javascript skills" > Demo4: Compare the different elements of the two strings and Print it out. The two strings have an inclusion relationship, that is, one string must be a substring of the other string. For example, {1,2,4} is a substring of {1,2,3,4,5} <div class="codetitle"> <a style="CURSOR: pointer" data="73695" class="copybut" id="copybut73695" onclick="doCopy('code73695')">Copy code</a> The code is as follows:</div> <div class="codebody" id="code73695"> <html> <head> <title>IT-Homer demo

Running results:
js handles common operations such as json and string comparison_javascript skills

Demo5:

Copy code The code is as follows:

hello

我,喜,欢

,你

~~,做,朋,友~~

运行结果：

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