{
    "histroys": [
        {
            "since": "2.1.16",
            "overloads": [
                {
                    "parameters": [
                        {
                            "name": "collectionSelector",
                            "types": [
                                "function",
                                "string",
                                "symbol",
                                "number"
                            ],
                            "descriptions": [
                                "要应用于输入序列中的每个元素转换函数"
                            ],
                            "defaultValue": "defaultSelector",
                            "declare": {
                                "returns": {
                                    "type": "IEnumerable"
                                },
                                "parameters": [
                                    {
                                        "name": "element",
                                        "types": [
                                            "any"
                                        ]
                                    },
                                    {
                                        "name": "index",
                                        "types": [
                                            "number"
                                        ]
                                    }
                                ]
                            }
                        },
                        {
                            "name": "resultSelector",
                            "types": [
                                "function"
                            ],
                            "descriptions": [
                                "要应用于中间序列的每个元素的转换函数"
                            ],
                            "defaultValue": "defaultResultSelector",
                            "declare": {
                                "returns": {
                                    "type": "any"
                                },
                                "parameters": [
                                    {
                                        "name": "sourceElement",
                                        "types": [
                                            "any"
                                        ]
                                    },
                                    {
                                        "name": "collectionElement",
                                        "types": [
                                            "any"
                                        ]
                                    }
                                ]
                            }
                        }
                    ],
                    "returns": {
                        "type": "IEnumerable",
                        "descriptions": [
                            "一对多转换函数对输入序列中的每个元素调用的结果序列"
                        ]
                    },
                    "description": "一个序列的每个元素投影为一个序列, 并将结果展开合并为一个结果序列",
                    "remarks": [
                        "此方法通过延迟执行的方式实现"
                    ],
                    "sees": [
                        {
                            "apis": "IEnumerable",
                            "method": "select"
                        },
                        {
                            "apis": "IEnumerable",
                            "method": "groupBy"
                        },
                        {
                            "apis": "Enumerable.selectors",
                            "property": "default"
                        },
                        {
                            "apis": "Enumerable.selectors",
                            "method": "result"
                        },
                        {
                            "href": "https://msdn.microsoft.com/{language}/library/bb534732(v=vs.110).aspx",
                            "title": "Microsoft MSDN"
                        }
                    ]
                }
            ]
        }
    ]
}