var shell = function (method) {
window[method].apply(null, Array.prototype.slice.call(arguments, 1));
};
shell('alert', 'monkey!');
var shell = function (method) { window[method].apply(null, Array.prototype.slice.call(arguments, 1)); }; shell(‘alert’, ‘monkey!’);
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alert.apply is the problem. Alert is not part of the language, so it may not be even a function. It is implementation-dependent.