js:
var block = function(arg){ alert(arg) };
var func = function(arr,blck){
for (var i in arr){
blck(arr[i]);
}
};
func([1,2,3],block);
ruby:
class Array
def my_each
if block_given?
yield(self)
else
raise ArgumentError
end
end
end
[1,2,3].my_each{|i| puts i}
当然ruby自带的each map是很方便的..
[1,2,3].each{|i| puts i}
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