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VoloshchenkoAl/Example for reduce in two dimensional massive

Created March 2, 2016 19:16
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Example for reduce in two dimensional massive
var arr = [[3,1,1,1],
[1,1,1,1],
[1,1,1,1],
[1,1,1,1]];
var sum = arr.reduce(function(prev,cur,i){
return prev+cur[i]+cur[arr.length-1-i];
},0);
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