Question

121

How to shift arguments?

rated 0 times [ 124] [ 3] / answers: 1 / hits: 20696 / 14 Years ago, sun, january 23, 2011, 12:00:00

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?

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jimmieo

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answered 14 Years ago ernest · Accepted Answer

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);

    });

}