Javascript func_num_args : Function Handling : PHP functions in JavaScript JAVASCRIPT TUTORIALS

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Javascript func_num_args

Get the number of arguments that were passed to the function

Example 1

Running
1.function tmp_a() {return func_num_args();}
2.tmp_a('a', 'b');

Could return
1.2

function func_num_args() {
    // Get the number of arguments that were passed to the function  
    // 
    // version: 812.1714
    // discuss at: http://phpjs.org/functions/func_num_args
    // +   original by: Brett Zamir
    // %        note 1: May not work in all JS implementations
    // *     example 1: function tmp_a() {return func_num_args();}
    // *     example 1: tmp_a('a', 'b');
    // *     returns 1: 2
    if (!arguments.callee.caller) {
        try {
            throw new Error('Either you are using this in a browser which does not support the "caller" property or you are calling this from a global context');
            return false;
        } catch(e){
            return false;
        }
    }

    return arguments.callee.caller.arguments.length;
}

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