How to shift "arguments"?

Question

Here's the script:

function runScripts() {     if (arguments.length === 0) return;     chrome.tabs.executeScript(null, {         file: arguments[0]     }, function() {         arguments.shift();         runScripts.apply(null, arguments);     }); } 

It doesn't work because arguments is not actually an array, it's just array-like. So how can I "shift" it or hack off the first element so that I can apply this function recursively?

Answer 1

var params = Array.prototype.slice.call(arguments); params.shift(); 

You can check out this blog post which explains it in further detail.

Answer 2

I assume you want to reference the original arguments, instead of that from the callback you're passing to chrome.tabs.executeScript.

If so, you'll need to cache it first.

function runScripts() {     if (arguments.length === 0) return;     var args = [];     Array.prototype.push.apply( args, arguments );      chrome.tabs.executeScript(null, {         file: args.shift();     }, function() {              // using the modified Array based on the original arguments object         runScripts.apply(null, args);     }); }