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Question

我有这样的json ..

{
"Project_details": [
    {
        "Project_ID": "1245353445",
        "Name": "Test1",
        "Releases": [
            {
                "sid_ratio": "5.0",
                "release_version": "13.2",
                "pre_delivery": {
                    "total": "13",
                    "blocker": "2",
                    "critical": "2",
                    "major": "4",
                    "normal": "6",
                    "minor": "1"
                },
                "post_delivery": {
                    "total": "3",
                    "blocker": "2",
                    "critical": "0",
                    "major": "1",
                    "normal": "1",
                    "minor": "1"
                }
            },
            {
                "sid_ratio": "15.0",
                "release_version": "14.1",
                "pre_delivery": {
                    "total": "13",
                    "blocker": "3",
                    "critical": "2",
                    "major": "4",
                    "normal": "6",
                    "minor": "1"
                },
                "post_delivery": {
                    "total": "3",
                    "blocker": "3",
                    "critical": "0",
                    "major": "1",
                    "normal": "1",
                    "minor": "1"
                }
            },
            {
                "sid_ratio": "15.0",
                "release_version": "14.2",
                "pre_delivery": {
                    "total": "13",
                    "blocker": "0",
                    "critical": "2",
                    "major": "4",
                    "normal": "6",
                    "minor": "1"
                },
                "post_delivery": {
                    "total": "3",
                    "blocker": "0",
                    "critical": "0",
                    "major": "1",
                    "normal": "1",
                    "minor": "1"
                }
            }
        ]
    }
]
}

我想在一个数组中获得唯一的release_version ..

我需要另一个数组中的“项目ID”和“名称”键。

如何使用angularjs实现这一目标？这些数据我想在控制器中获取并将这些数组分配给$ scope ..

Answer 1

我知道这个问题已被接受。而且我喜欢纯粹的javascript。但是，我无法通过 LoDash 提供优雅的解决方案。

据我所知，你需要两个不同的阵列。

在数组中提取 release_version

_.pluck(data['Project_details'][0]['Releases'], 'release_version');
// ["13.2", "14.1", "14.2"]

提取 Project_Id 和名称

_.pick(data['Project_details'][0], ['Project_ID', 'Name'])
// Object {Project_ID: "1245353445", Name: "Test1"}

使用索引0，因为Project_details数组中只有一行。

Answer 2

没有什么特别的角度。最终代码（原始javascript）：

var x = {
    "Project_details": [
        {
            "Project_ID": "1245353445",
            "Name": "Test1",
            "Releases": [
                {
                    "sid_ratio": "5.0",
                    "release_version": "13.2",
                    "pre_delivery": {
                        "total": "13",
                        "blocker": "2",
                        "critical": "2",
                        "major": "4",
                        "normal": "6",
                        "minor": "1"
                    },
                    "post_delivery": {
                        "total": "3",
                        "blocker": "2",
                        "critical": "0",
                        "major": "1",
                        "normal": "1",
                        "minor": "1"
                    }
                },
                {
                    "sid_ratio": "15.0",
                    "release_version": "14.1",
                    "pre_delivery": {
                        "total": "13",
                        "blocker": "3",
                        "critical": "2",
                        "major": "4",
                        "normal": "6",
                        "minor": "1"
                    },
                    "post_delivery": {
                        "total": "3",
                        "blocker": "3",
                        "critical": "0",
                        "major": "1",
                        "normal": "1",
                        "minor": "1"
                    }
                },
                {
                    "sid_ratio": "15.0",
                    "release_version": "14.2",
                    "pre_delivery": {
                        "total": "13",
                        "blocker": "0",
                        "critical": "2",
                        "major": "4",
                        "normal": "6",
                        "minor": "1"
                    },
                    "post_delivery": {
                        "total": "3",
                        "blocker": "0",
                        "critical": "0",
                        "major": "1",
                        "normal": "1",
                        "minor": "1"
                    }
                }
            ]
        }
    ]
};
var y = createMap(selectMany(x.Project_details.map(function (x) { return x.Releases; })).map(function (x) { return x.release_version; }));
console.log(Object.keys(y)); // "13.2" "14.1" "14.2"
function selectMany(arr) {
    var result = [];
    for (var i = 0; i < arr.length; i++) {
        for (var j = 0; j < arr[i].length; j++) {
            result.push(arr[i][j]);
        }
    }
    return result;
}
function createMap(arr) {
    return arr.reduce(function (result, key) {
        result[key] = true;
        return result;
    }, {});
}

您基本上需要功能selectMany和createMap。

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我实际上是在TypeScript中编写它，看到类型转换更有趣（但对初学者来说可能更复杂）：

let x = {
"Project_details": [
    {
        "Project_ID": "1245353445",
        "Name": "Test1",
        "Releases": [
            {
                "sid_ratio": "5.0",
                "release_version": "13.2",
                "pre_delivery": {
                    "total": "13",
                    "blocker": "2",
                    "critical": "2",
                    "major": "4",
                    "normal": "6",
                    "minor": "1"
                },
                "post_delivery": {
                    "total": "3",
                    "blocker": "2",
                    "critical": "0",
                    "major": "1",
                    "normal": "1",
                    "minor": "1"
                }
            },
            {
                "sid_ratio": "15.0",
                "release_version": "14.1",
                "pre_delivery": {
                    "total": "13",
                    "blocker": "3",
                    "critical": "2",
                    "major": "4",
                    "normal": "6",
                    "minor": "1"
                },
                "post_delivery": {
                    "total": "3",
                    "blocker": "3",
                    "critical": "0",
                    "major": "1",
                    "normal": "1",
                    "minor": "1"
                }
            },
            {
                "sid_ratio": "15.0",
                "release_version": "14.2",
                "pre_delivery": {
                    "total": "13",
                    "blocker": "0",
                    "critical": "2",
                    "major": "4",
                    "normal": "6",
                    "minor": "1"
                },
                "post_delivery": {
                    "total": "3",
                    "blocker": "0",
                    "critical": "0",
                    "major": "1",
                    "normal": "1",
                    "minor": "1"
                }
            }
        ]
    }
]
}



let y = createMap(selectMany(x.Project_details.map(x=>x.Releases)).map(x=>x.release_version));
console.log(Object.keys(y));// "13.2" "14.1" "14.2"


function selectMany<T>(arr: T[][]): T[] {
    var result = [];
    for (var i = 0; i < arr.length; i++) {
        for (var j = 0; j < arr[i].length; j++) {
            result.push(arr[i][j]);
        }
    }
    return result;
}

function createMap(arr: string[]): { [string: string]: boolean } {
    return arr.reduce((result: { [string: string]: boolean }, key: string) => {
        result[key] = true;
        return result;
    }, <{ [string: string]: boolean }>{});
}

Answer 3

使用angular.forEach

从Json获取特定唯一值的简便方法

var notificationcontent = [{"type":"success","title":"title","body":"Your deadline to open an Term deposit and save thousands in taxes is june 20th!","timeout":"0","bodyOutputType":"trustedHtml","clickHandler":""},

{"type":"error","title":"title","body":"This month, Your spent Rs.500.05 on restaurants. This exceeds your budget of Rs.300 by Rs.200.","timeout":"0","bodyOutputType":"trustedHtml","clickHandler":""},

{"type":"warning","title":"title","body":"This month, Your spent Rs.500.05 on Gas and Fuel. This exceeds your budget of Rs.800 by Rs.200.","timeout":"0","bodyOutputType":"trustedHtml","clickHandler":""}];

angular.forEach ( notificationcontent, function(value, key) {alert(value.type);console.log(value.body);});

如何从angularjs中的json获取特定的唯一值

3 个答案:

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