Question

I have a list of javascript variable like this
var_111, var_222, var_132, var_122bb …

The string after the underscore are response from a remote server, so I cannot specify them beforehand.

I want to run a for loop that would iterate through all the var_* variables. For example console.log all the variables.

I guess it can be done with regex but I really haven’t learn it yet. Hope someone can help!

Answer 1

str.match(/var_\d+/g).forEach(function(v)
{
    console.log(v); // v here is a variable such as var_111
});

Based on the clarification below, assuming what is actually going on is that the server is setting a bunch of global variables whose names you can’t control, what you want is:

for (var k in window)
   if (window.hasOwnProperty(k) && k.match(/^var_\d+$/))
      console.log(k)

This iterates over all global variables and compares them to the regular expression to get the ones of the type var_###, and prints them out for you. You can get the values with window[k]. This works because all global variables are in fact properties of the window object.