如何將所有值從具有特定鍵、深度鍵的 JSON 對象放入數組中

Question

我正在嘗試解析一個包含大部分無用信息的大型 json 對象。 我正在嘗試訪問所有 '_text' 鍵及其值並將它們放入一個數組中。 前任：

const myObj = {
"_declaration": {
    "_attributes": {
        "version": "1.0",
        "encoding": "UTF-8",
        "standalone": "yes"
    }
},
"w:document": {
    "_attributes": {
        "xmlns:wpc": "http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas",
        "xmlns:cx": "http://schemas.microsoft.com/office/drawing/2014/chartex",
        "xmlns:cx1": "http://schemas.microsoft.com/office/drawing/2015/9/8/chartex",
        "xmlns:cx2": "http://schemas.microsoft.com/office/drawing/2015/10/21/chartex",
        "xmlns:cx3": "http://schemas.microsoft.com/office/drawing/2016/5/9/chartex",
        "xmlns:cx4": "http://schemas.microsoft.com/office/drawing/2016/5/10/chartex",
        "xmlns:cx5": "http://schemas.microsoft.com/office/drawing/2016/5/11/chartex",
        "xmlns:cx6": "http://schemas.microsoft.com/office/drawing/2016/5/12/chartex",
        "xmlns:cx7": "http://schemas.microsoft.com/office/drawing/2016/5/13/chartex",
        "xmlns:cx8": "http://schemas.microsoft.com/office/drawing/2016/5/14/chartex",
        "xmlns:mc": "http://schemas.openxmlformats.org/markup-compatibility/2006",
        "xmlns:aink": "http://schemas.microsoft.com/office/drawing/2016/ink",
        "xmlns:am3d": "http://schemas.microsoft.com/office/drawing/2017/model3d",
        "xmlns:o": "urn:schemas-microsoft-com:office:office",
        "xmlns:r": "http://schemas.openxmlformats.org/officeDocument/2006/relationships",
        "xmlns:m": "http://schemas.openxmlformats.org/officeDocument/2006/math",
        "xmlns:v": "urn:schemas-microsoft-com:vml",
        "xmlns:wp14": "http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing",
        "xmlns:wp": "http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing",
        "xmlns:w10": "urn:schemas-microsoft-com:office:word",
        "xmlns:w": "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
        "xmlns:w14": "http://schemas.microsoft.com/office/word/2010/wordml",
        "xmlns:w15": "http://schemas.microsoft.com/office/word/2012/wordml",
        "xmlns:w16cid": "http://schemas.microsoft.com/office/word/2016/wordml/cid",
        "xmlns:w16se": "http://schemas.microsoft.com/office/word/2015/wordml/symex",
        "xmlns:wpg": "http://schemas.microsoft.com/office/word/2010/wordprocessingGroup",
        "xmlns:wpi": "http://schemas.microsoft.com/office/word/2010/wordprocessingInk",
        "xmlns:wne": "http://schemas.microsoft.com/office/word/2006/wordml",
        "xmlns:wps": "http://schemas.microsoft.com/office/word/2010/wordprocessingShape",
        "mc:Ignorable": "w14 w15 w16se w16cid wp14"
    },
    "w:body": {
        "w:p": [
            {
                "_attributes": {
                    "w14:paraId": "53160B82",
                    "w14:textId": "77777777",
                    "w:rsidR": "00484DC0",
                    "w:rsidRDefault": "00484DC0",
                    "w:rsidP": "00264A78"
                },
                "w:pPr": {
                    "w:spacing": {
                        "_attributes": {
                            "w:after": "0",
                            "w:line": "240",
                            "w:lineRule": "auto"
                        }
                    },
                    "w:rPr": {
                        "w:sz": {
                            "_attributes": {
                                "w:val": "36"
                            }
                        },
                        "w:szCs": {
                            "_attributes": {
                                "w:val": "36"
                            }
                        }
                    }
                }
            },
            {
                "_attributes": {
                    "w14:paraId": "0FC460F5",
                    "w14:textId": "77777777",
                    "w:rsidR": "00880E84",
                    "w:rsidRDefault": "00880E84",
                    "w:rsidP": "00264A78"
                },
                "w:pPr": {
                    "w:spacing": {
                        "_attributes": {
                            "w:after": "0",
                            "w:line": "240",
                            "w:lineRule": "auto"
                        }
                    },
                    "w:rPr": {
                        "w:sz": {
                            "_attributes": {
                                "w:val": "36"
                            }
                        },
                        "w:szCs": {
                            "_attributes": {
                                "w:val": "36"
                            }
                        }
                    }
                },
                "w:r": {
                    "w:rPr": {
                        "w:sz": {
                            "_attributes": {
                                "w:val": "36"
                            }
                        },
                        "w:szCs": {
                            "_attributes": {
                                "w:val": "36"
                            }
                        }
                    },
                    "w:t": {
                        "_text": "Teaching Guide/Lesson Template"
                    }
                }
            }
            ...More of the object, this is the JSON format that I 
            then parse using JSON.parse in my code to read
const myArray = /*An array*/
//myArray should be ["Some text", "that I want", "in an array"]

順序很重要 我用遞歸函數試過這個，但對象太大，我超過了最大調用堆棧。 是否有任何函數或庫可以用於此功能？

Answer 1

使用Object.keys一個遞歸函數，如下所示：

 function getText(obj) { let text = []; Object.keys(obj).forEach(key => { if (key == "_text") { text.push(obj[key]); } if (typeof obj[key] == "object") { text.push(getText(obj[key])); } }); const flatten = function(arr, result = []) { for (let i = 0, length = arr.length; i < length; i++) { const value = arr[i]; if (Array.isArray(value)) { flatten(value, result); } else { result.push(value); } } return result; }; return flatten(text); } const myObj = { object1: { deeperLevel: { _text: "Some text" } }, object2: { _text: "that I want" }, object3: { deeperLevel: { EvenDeeper: { _text: "in an array" } } } }; const myArr = getText(myObj); console.log(myArr);

來自這個答案的扁平化算法。