JavaScript calculates a two-dimensional array duplicate value sample code _javascript tips

Objective

A problem has recently been encountered with the need to compute duplicate values of two-dimensional arrays using JavaScript, as there is a two-dimensional array below

[[\ ' error\ ', 3],[\ ' error\ ', 5],[\ ' error\ ', 6],[\ ' true\ ', 3],[\ ' true\ ', 1]]

Statistics are needed to compute duplicates \ ' error\ ' and \ ' true\ ',

Results after the statistical calculation:

[[\ ' error\ ', 14],[\ ' true\ ', 4]]

Implementation code:

var arr = [[\ ' error\ ', 3],[\ ' error\ ', 5],[\ ' error\ ', 6],[\ ' true\ ', 3],[\ ' true\ ', 1]];
var obj = {};
var result = [];
Arr.foreach (function (arr) {
 obj[arr[0]] = obj[arr[0]]? Obj[arr[0]] + arr[1]: arr[1];
for (var i in obj) {
 Result.push ([i,obj[i]])
}

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