如何为由变量名称后跟Javascript中的任何字符组成的字符串创建正则表达式？

Question

I need to verify "pathnames" of items stored in localStorage (pathname being a string like: abc/localstorage/ualldocs/aalldocs in order to filter whats in localstorage.

Right now I'm trying this:

priv.localpath = "abc/localstorage/ualldocs/aalldocs";

for (i in localStorage) {
  if (localStorage.hasOwnProperty(i)) {
    s = new RegExp('\\/' + priv.localpath + '\\/.*$');
    if (s.test(i)) {
      value = localStorage.getItem(i);
      console.log( value );
    } else {
      console.log( "not found: "+i);
    }
  }
}

Which does not work = does not find anything.

Question:
How do I create a regex for a string made up of a variable name followed by any character?

Answer 1

But the answer is still the same:

Using the constructor allows this for RegExp

    priv.localpath = "abc/localstorage/ualldocs/aalldocs";

for (i in localStorage) {
  if (localStorage.hasOwnProperty(i)) {
    s = new RegExp(priv.localpath + '\\/*$', "i")
    if (s.test(i)) {
      value = localStorage.getItem(i);
      console.log( value );
    } else {
      console.log( "not found: "+i);
    }
  }
}

Answer 2

Your regex in the loop is always the same, being: new RegExp("\\\\/abc/localstorage/ualldocs/aalldocs\\\\/*$") which will translate into: \\/abc/localstorage/ualldocs/aalldocs\\/*$

I don't really understand:

1. why you regenerate the same regex in the loop;
2. what you're trying to achieve.

However, your answering your question:

var someString = "something"
var myRegex = new RegExp(someString + '.*'); // creates a regex for the string made up of a variable 'someString' followed by any character: '.*'