Question

我在JS中有以下代码：

if (all[j][i][11] != Boolean(1) && $scope.w[j][i] != undefined && $scope.ip[j][i] != undefined && $scope.type[j][i] != undefined)
            var specificArray = []
            specificArray.push($scope.w[j][i]);
            // continue with the code

它给了我下一个错误：

TypeError: Cannot read property 'push' of undefined

但是，在推送操作之前定义了SpecificArray。

我也尝试：var specificArray = new Array()

Answer 1

你应该在条件

上添加一些花括号

if (all[j][i][11] != Boolean(1) && $scope.w[j][i] != undefined && $scope.ip[j][i] != undefined && $scope.type[j][i] != undefined){
    var specificArray = []
    specificArray.push($scope.w[j][i]);
}

没有它，行为就像这样：

if (all[j][i][11] != Boolean(1) && $scope.w[j][i] != undefined && $scope.ip[j][i] != undefined && $scope.type[j][i] != undefined){
    var specificArray = [];
}
specificArray.push($scope.w[j][i]); // Cannot read property 'push' of undefined

JS /无法读取未定义的属性'push'

1 个答案: