Tools, FAQ, Tutorials:
JSON-stringify-Filter.html - JSON.stringify() Array Replacer
How to write a replacer array to filter values while the JSON.stringify() function is generating the JSON text string?
✍: FYIcenter.com
If you call JSON.stringify() with an array as the replacer, the array elements
will be used to filters to select object properties with keys match one of array elements.
All other object properties will be dropped.
But all array elements and standalone values will be remain in the output.
Here is a JavaScript example that a replacer array to keep only "name" and "group" properties in any objects, and filter out all other properties. But array elements are staying in the output.
<!-- JSON-stringify-Filter.html Copyright (c) FYIcenter.com --> <html> <body> <script type="text/javascript"> var filter = ["name", "group"]; function stringifier(val) { var str = JSON.stringify(val, ["name", "group"]); return str; } document.write("<p>JSON.stringify() Replacer to Transform Values:</p>"); document.write("<pre>"); str = '{"name": "Joe", "age": 25, "group": null}'; document.write("Input = "+str+"\n"); json = stringifier(JSON.parse(str)); document.write("Output = "+json+"\n"); str = '["first", {"name": "Jay", "age": 55, "group": "VIP"}]'; document.write("Input = "+str+"\n"); json = stringifier(JSON.parse(str)); document.write("Output = "+json+"\n"); str = '["name", "Kim", "age", 30, "group", "Host"]'; document.write("Input = "+str+"\n"); json = stringifier(JSON.parse(str)); document.write("Output = "+json+"\n"); document.write("</pre>"); </script> </body> </html>
Open the above code in a Web browser. You see the following output:
JSON.stringify() Replacer to Transform Values: Input = {"name": "Joe", "age": 25, "group": null} Output = {"name":"Joe","group":null} Input = ["first", {"name": "Jay", "age": 55, "group": "VIP"}] Output = ["first",{"name":"Jay","group":"VIP"}] Input = ["name", "Kim", "age", 30, "group", "Host"] Output = ["name","Kim","age",30,"group","Host"]
2017-08-17, 289👍, 0💬
Popular Posts:
How to login to the Developer Portal internally by you as the publisher? Normally, the Developer Por...
How To Copy Array Values to a List of Variables in PHP? If you want copy all values of an array to a...
What Is HTML? HTML (HyperText Markup Language) is the standard markup language for creating Web page...
How to add images to my EPUB books Images can be added into book content using the XHTML "img" eleme...
How To Remove Slashes on Submitted Input Values in PHP? By default, when input values are submitted ...