我可以在JSON中存储RegExp和Function吗? [英] Can I store RegExp and Function in JSON?
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问题描述
给出一个这样的块:
var foo = {"regexp":/^http:\/\//,
"fun":function(){},
}
将它存储在JSON中的正确方法是什么?
What is a proper way to store it in JSON?
推荐答案
您必须将RegExp存储为JSON对象中的字符串。然后,您可以从字符串构造一个RegExp对象:
You have to store the RegExp as a string in the JSON object. You can then construct a RegExp object from the string:
// JSON Object (can be an imported file, of course)
// Store RegExp pattern as a string
// Double backslashes are required to put literal \ characters in the string
var jsonObject = { "regex": "^http:\\/\\/" };
function fun(url) {
var regexp = new RegExp(jsonObject.regex, 'i');
var match;
// You can do either:
match = url.match(regexp);
// Or (useful for capturing groups when doing global search):
match = regexp.exec(url);
// Logic to process match results
// ...
return 'ooga booga boo';
}
至于函数:它们不应该用JSON或XML表示。函数可以定义为JS中的对象,但其主要目的仍然是封装一系列命令,而不是作为基本数据的包装。
As for functions: they should not be represented in JSON or XML anyway. A function may be defined as an object in JS, but its primary purpose is still to encapsulate a sequence of commands, not serve as a wrapper for basic data.
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