Question

I want do something like:

for(var i=0; i < 3, i++) {
  var file_i = i;
}

and got local variables: file_0 = 0,file_1 = 1, file_2 =2

I’m also want to know how to make it happen in Ruby.

Answer 1

If you don’t mind the new variables being global:

for(var i=0; i < 3, i++) {
  window["file_" + i] = i;
}

But as comments have noted, this is a bad idea. Make these properties of an object:

var files = { };
for(var i=0; i < 3; i++) {  // <-------- typo there.  Should be a ; after i < 3
    files["file_" + i] = i;
}

And then you can read back these properties with:

for (var key in files) {
    if ({}.hasOwnProperty.call(files, key))
        alert(key + " " + files[key]); 
}

I’m afraid I don’t know how to do this with Ruby.