javascript - 需要检查 key 是否已经存在以及王牌值，javascript

Question

var data = [
    ["default_PROJECT", "Allow", "Connect", "Allow", "AddComment", "Allow", "Write",
        "Allow", "ViewComments", "Allow", "ExportData", "Allow", "ExportImage", "Allow",
        "ViewUnderlyingData", "Allow", "Read", "Allow", "ShareView", "Allow", "Filter"
    ],
    ["testing_PROJECT", "Allow", "ExportImage", "Allow", "Write", "Allow", "ViewComments",
        "Allow", "ShareView", "Allow", "Filter", "Allow", "ExportData", "Allow", "Connect", "Allow",
        "Read", "Allow", "ViewUnderlyingData", "Allow", "AddComment", "Allow", "ViewComments", "Deny", "ExportData", "Allow",
        "AddComment", "Deny", "Write", "Allow", "Read", "Deny", "ExportXml", "Deny", "ShareView", "Allow", "Connect", "Allow", "ChangeHierarchy", "Allow",
        "WebAuthoring", "Deny", "ViewUnderlyingData", "Deny", "Filter", "Deny", "ExportImage"
    ]
];


var result = [];
for (var i = 0, len = data.length; i < len; i++) {
    var list = data[i];
    result[i] = {
        Project: list[0]
    };
    for (var j = list.length - 1; j >= 1; j = j - 2) {
        var key = list[j];
        var value = list[j - 1];
        result[i][key] = value;
    }
}
console.log(result);

对于某些键，可能有多个值。如果现有值是允许，并且同一 key 有一个值拒绝，我需要拒绝该 key 的新值。例如，在第二个数组中，键“ExportImage”的值应为“Deny”而不是“Allow”。我创建了对象，但如何检查这些值是否应该被覆盖？

Answer 1

对象的美妙之处在于您可以检查它们的值；)由于“Deny”优于所有其他变量 - 那么就让它获胜，否则就是最后一个值。

情况 1:允许、拒绝、允许、Foo、Bar => 拒绝
情况 2:Allow、Foo、Bar、Allow、Baz => Baz

for (var j = list.length - 1; j >= 1; j = j - 2) {
    var key = list[j];
    var value = list[j - 1];
    if( result[i][key] !== "Deny" ) {
        result[i][key] = value;
    }
}