检查key-value是否具有相同的值

Question

因此，我将一个.csv文件转换为一个键值对数组，尝试打印每个唯一的值，并尝试找出如何检查以确保这些值不相同。举个例子：

    var data = $.csv.toObjects(csv);

会把一切都变成

 [
{heading1:"value1_1",heading2:"value2_1",heading3:"value3_1",heading4:"value4_1",heading5:"value5_1"}
{heading1:"value1_2",heading2:"value2_2",heading3:"value3_2",heading4:"value4_2",heading5:"value5_2" }
]

我想检查heading1在两个实例中是否具有相同的值，如果是，则仅打印该值的第一个实例。

Answer 1

将数据转换为键值对，其中键是来自"heading1“的值，如下所示：

var data = [
    {heading1:"value1_1",heading2:"value2_1",heading3:"value3_1",heading4:"value4_1",heading5:"value5_1"},
    {heading1:"value1_2",heading2:"value2_2",heading3:"value3_2",heading4:"value4_2",heading5:"value5_2" },
];

var filtered = {};
for (var i = 0, max = data.length; i < max; i++) {
    var record = data[i];

    if (!filtered[record.heading1]) {
        filtered[record.heading1] = {};
    }

    filtered[record.heading1] = record;
}

var keys = Object.keys(filtered);
for (var i = 0, max = keys.length; i < max; i++) {
    console.log(filtered[keys[i]]); // do print
}