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var info = [[1,'jack'],[0,'mary'],[3,'tom']];
$.each(info, function(i, j){
$.each(j, function(m, n){
document.write(n);
if(m < j.length - 1){
document.write("=>");
}
});
document.write("<br/>");
});
//打印结果如下
1=>jack
0=>mary
3=>tom