从属性等于值的数组中获取项目

Question

This questions is for my LightSwitch project but I'm not sure that's renavent. I've never done javascript or jquery before and i'm pretty sure this will have nothing to do with LightSwitch and everything to do with the latter.

The following code works perfectly setting test equal to 4 in my case:

myapp.BrowseTreeNodes.TreeNodes_render = function (element, contentItem) {
    var screen = contentItem.screen;
    var result = screen.MyArray.data[0];
    var test = result.Id;
}

What I need to do is instead of setting result to the first item in the array I need to set result to the item with a specific Id, for this example let's say 4.

Here's what i've tried:

var result = $.grep(screen.MyArray.data, function (e) { return e.Id === 4; })[0];
var result = screen.MyArray.data.filter(function (v) { return v.Id === 4; })[0];
var result = screen.MyArray.data.find(x => x.Id === 4)[0];

Thank you in advance.

Answer 1

您的问题可能是=== , ===检查类型，因此"4" === 4为false而"4" == 4为true ，请检查您的 id 属性是否存储为字符串或整数...