我有一个带有嵌套数组的对象和一个看起来像这样的对象:
// Recursive nested objects & arrays:
var obj = {
children: [{
parentname: "level 0, Benny",
children: [{
parentname: "level 0.0, Stevey",
children: [{
parentname: "level 0.0.0, Betty",
children: []
},
{
parentname: "level 0.0.1, AFGNCAAP",
children: [{
parentname: "level 0.0.1.0, Moonman",
children: []
}]
}
]
},
{
parentname: "level 0.1, Oreo",
children: []
}
]
},
{
parentname: "level 1, Jupiter",
children: []
}
]
};
// I am able to retrieve values with various length formulas:
console.log(obj.children[0].parentname); // level 0, Benny
console.log(obj.children[0].children[0].parentname); // level 0.0, Stevey
console.log(obj.children[0].children[0].children[0].parentname); // level 0.0.0, Betty
console.log(obj.children[0].children[0].children[1].parentname); // level 0.0.1, AFGNCAAP
console.log(obj.children[0].children[0].children[1].children[0].parentname); // level 0.0.1.0, Moonman
console.log(obj.children[0].children[1].parentname); // level 0.1, Oreo
console.log(obj.children[1].parentname); // level 1, Jupiter
// And I able to reduce formulas into functions...per level of nesting, example 1 level:
function getNameWorking1(name, level) {
console.log(obj[name][level].parentname);
}
getNameWorking1(["children"], [1]) // level 1, Jupiter
// And example 2 levels:
function getNameWorking2(name, level) {
console.log(obj[name][level[0]][name][level[1]].parentname);
}
getNameWorking2(["children"], [
[0],
[1]
]) // level 0.1, Oreo
// I am trying to create a single function that I can send a parameter with the sequence of property name & array values. This does not work:
function getNameNotWorking(parameter) {
console.log(obj[parameter].parentname);
}
getNameNotWorking("[children][1]");
getNameNotWorking("[children][0][children][1]");
我正在尝试创建一个函数,该函数可以按属性名称和数组值的顺序发送参数。最后一个功能不起作用。有什么帮助吗?
顺便说一句。我有一个递归函数确实可以做到这一点。但是它每次从头开始就起作用,并仔细阅读每个嵌套对象和数组,直到找到我要查找的项目为止。似乎重复做可能太过分了。因此,我正在寻找一种方法,以便在知道对象位置后通过所有子数组值查找该对象。
我认为您不应该pass your parameters separated by white sapace
使用方括号括起来,以使解析和解决方案更加容易。
和。干得好 :)
function getNameWorking1(parameter, obj) {
paramsList = parameter.split(' ').filter(prop => Boolean(prop)).map(prop => prop.trim());
return paramsList.reduce((val, prop) => {
return val[prop];
}, obj).parentname;
}
//Working example:
var obj = {
children: [{
parentname: "level 0, Benny",
children: [{
parentname: "level 0.0, Stevey",
children: [{
parentname: "level 0.0.0, Betty",
children: []
},
{
parentname: "level 0.0.1, AFGNCAAP",
children: [{
parentname: "level 0.0.1.0, Moonman",
children: []
}]
}
]
},
{
parentname: "level 0.1, Oreo",
children: []
}
]
},
{
parentname: "level 1, Jupiter",
children: []
}
]
};
console.log(getNameWorking1("children 1", obj));
console.log(getNameWorking1("children 0 children 1", obj));
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我来说两句