IE中的等价传播算子-Javascript

本文介绍了IE中的等价传播算子-Javascript的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个javascript函数来填充单个表格行的下拉列表，例如:

I have a javascript function to populate dropdowns for individual table rows like:

$scope.possibleOptions = getUniqueValues($scope.yypeOptions, 'yypeOption')
    .map(function(id) {
            return {
                id: id,
                name: id
            });

function getUniqueValues(array, prop) {
    return [...new Set(array.map(item => item[prop]))];
}

其中， $ scope.yypeOptions 是:

$scope.yypeOptions = [{
    yypeOption: "option1"
}, {
    yypeOption: "option2"
}];

我现在必须使其与IE兼容.我必须替换 spread 和 => 运算符.

I now have to make it compatible to IE. The spread and => operator is something I have to replace.

通过此和此链接.但是我对如何在数组功能内部替换Set一无所知.

Went through this and this link. But I could not get any understanding how to replace the Set inside an Array feature.

推荐答案

这是可以在IE上运行的简单方法

Here is a simple way that could work on IE

data =[{name:"a"}, {name:"a"},{name:"x"}]

function getUniqueValues(array, prop) {
    return array.map(function(item) { return item[prop]; })
    .filter(function (item, index, self){ return self.indexOf(item) === index; }); // distinct
}

console.log(getUniqueValues(data, "name"))

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