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var greeting = function(world){
return "hello " + world +"!";
};
alert(greeting("world"));


var greeting = function(world){
return "hello " + world +"!";
};
alert(greeting("world"));

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var wrap= function(fn){
return function(){
return fn.apply(null,arguments);
};
};


var wrap= function(fn){
return function(){
return fn.apply(null,arguments);
};
};
var greeting = function(world){
return "hello " + world +"!";
};
alert(greeting("world"));
alert(wrap(greeting)("world"))

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var wrap= function(fn){
return function(){
return fn.apply(window,arguments);
};
};


var wrap= function(fn){
return function(){
return fn.apply(window,arguments);
};
};
var greeting = function(world){
return "hello " + world +"!";
};
alert(greeting("world"));
alert(wrap(greeting)("world"))

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