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function myConcat(arguments, separator) {
    var attach = [];
	var sentence = '';
	for (var i = 0; i < arguments.length; i++) {
		attach.push(arguments[i] + separator);
	};
	for (var i = 0; i < attach.length; i++) {
		if (i == attach.length+1){
			
		}
		else{
			sentence = sentence + attach[i];
		}
	};	
	return sentence;
​
}

function myConcat(arguments, separator) {
	return arguments.join(separator)+separator;
}