在javascript中显示数组中的前一个元素
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【中文标题】在javascript中显示数组中的前一个元素【英文标题】：Display previous element in an array in javascript 【发布时间】：2021-12-01 22:23:22 【问题描述】：我有一组对象。我在过滤所有“@KAV”：“1”对象后尝试下面的一个。
let finalArray=kavArray[index-1];
kavArray 中存在的所有 "@KAV":"1" 对象。
在满足 "@KAV":"1" 存在的条件之前如何显示这些项目？
谢谢。
[
"@USEFORMAT": "1",
"@TEUR": "מרכיבי שכר לתשלום",
"@SUG_TASHLUM": "6",
"@TAARIF": "104135.00",
"@SCHUM_HODSHI": "107250.13",
"@KAV": "2"
,
"@USEFORMAT": "1",
"@TEUR": "שכר יסוד",
"@SUG_TASHLUM": "6",
"@KAVUA": "9",
"@SCHUM_HODSHI": "50.00",
"@SEMEL": "1",
"@KAV": "0"
,
"@USEFORMAT": "1",
"@TEUR": "ש.רגילות",
"@SUG_TASHLUM": "6",
"@SCHUM_HODSHI": "13652.67",
"@SEMEL": "101",
"@KAV": "0"
,
"@USEFORMAT": "1",
"@TEUR": "שכר בסיס",
"@SCHUM_HODSHI": "13702.67",
"@KAV": "1"
,
"@USEFORMAT": "1",
"@TEUR": "תשלום קיטנה",
"@SUG_TASHLUM": "6",
"@TAARIF": "182.55",
"@KAMUT": "1.00",
"@KAVUA": "מק",
"@SCHUM_HODSHI": "182.55",
"@SEMEL": "90",
"@KAV": "0"
,
"@USEFORMAT": "1",
"@TEUR": "החזר הוצאות",
"@SCHUM_HODSHI": "182.55",
"@KAV": "1"
,
"@USEFORMAT": "1",
"@TEUR": "תוספת פינוק",
"@SUG_TASHLUM": "6",
"@KAVUA": "או",
"@SCHUM_HODSHI": "3200.00",
"@SEMEL": "73",
"@KAV": "0"
,
"@USEFORMAT": "1",
"@TEUR": "מענקים",
"@SCHUM_HODSHI": "3200.00",
"@KAV": "1"
,
]
我怎样才能实现这些元素？
【问题讨论】：
【参考方案1】：您可以使用Array.filter() 过滤下一项具有键/值@KAV:"1" 的元素
const kavArray = [ "@USEFORMAT": "1", "@TEUR": "מרכיבי שכר לתשלום", "@SUG_TASHLUM": "6", "@TAARIF": "104135.00", "@SCHUM_HODSHI": "107250.13", "@KAV": "2" , "@USEFORMAT": "1", "@TEUR": "שכר יסוד", "@SUG_TASHLUM": "6", "@KAVUA": "9", "@SCHUM_HODSHI": "50.00", "@SEMEL": "1", "@KAV": "0" , "@USEFORMAT": "1", "@TEUR": "ש.רגילות", "@SUG_TASHLUM": "6", "@SCHUM_HODSHI": "13652.67", "@SEMEL": "101", "@KAV": "0" , "@USEFORMAT": "1", "@TEUR": "שכר בסיס", "@SCHUM_HODSHI": "13702.67", "@KAV": "1" , "@USEFORMAT": "1", "@TEUR": "תשלום קיטנה", "@SUG_TASHLUM": "6", "@TAARIF": "182.55", "@KAMUT": "1.00", "@KAVUA": "מק", "@SCHUM_HODSHI": "182.55", "@SEMEL": "90", "@KAV": "0" , "@USEFORMAT": "1", "@TEUR": "החזר הוצאות", "@SCHUM_HODSHI": "182.55", "@KAV": "1" , "@USEFORMAT": "1", "@TEUR": "תוספת פינוק", "@SUG_TASHLUM": "6", "@KAVUA": "או", "@SCHUM_HODSHI": "3200.00", "@SEMEL": "73", "@KAV": "0" , "@USEFORMAT": "1", "@TEUR": "מענקים", "@SCHUM_HODSHI": "3200.00", "@KAV": "1" , ]
const filteredArray = kavArray.filter((item, index) => kavArray[index+1] && kavArray[index+1]["@KAV"] === "1")
console.log(filteredArray)【讨论】：
我想在对象之前显示每个 "@KAV":"1"。@Harun Yilmaz @Chinmayee 我不确定我是否理解所需的输出。你也可以提供吗？【参考方案2】：您可以使用 javascript 的 filter 方法来完成。
const arr = [
"@USEFORMAT": "1",
"@TEUR": "מרכיבי שכר לתשלום",
"@SUG_TASHLUM": "6",
"@TAARIF": "104135.00",
"@SCHUM_HODSHI": "107250.13",
"@KAV": "2"
,
"@USEFORMAT": "1",
"@TEUR": "שכר יסוד",
"@SUG_TASHLUM": "6",
"@KAVUA": "9",
"@SCHUM_HODSHI": "50.00",
"@SEMEL": "1",
"@KAV": "0"
,
"@USEFORMAT": "1",
"@TEUR": "ש.רגילות",
"@SUG_TASHLUM": "6",
"@SCHUM_HODSHI": "13652.67",
"@SEMEL": "101",
"@KAV": "0"
,
"@USEFORMAT": "1",
"@TEUR": "שכר בסיס",
"@SCHUM_HODSHI": "13702.67",
"@KAV": "1"
,
"@USEFORMAT": "1",
"@TEUR": "תשלום קיטנה",
"@SUG_TASHLUM": "6",
"@TAARIF": "182.55",
"@KAMUT": "1.00",
"@KAVUA": "מק",
"@SCHUM_HODSHI": "182.55",
"@SEMEL": "90",
"@KAV": "0"
,
"@USEFORMAT": "1",
"@TEUR": "החזר הוצאות",
"@SCHUM_HODSHI": "182.55",
"@KAV": "1"
,
"@USEFORMAT": "1",
"@TEUR": "תוספת פינוק",
"@SUG_TASHLUM": "6",
"@KAVUA": "או",
"@SCHUM_HODSHI": "3200.00",
"@SEMEL": "73",
"@KAV": "0"
,
"@USEFORMAT": "1",
"@TEUR": "מענקים",
"@SCHUM_HODSHI": "3200.00",
"@KAV": "1"
,
];
const result = arr.filter(item => item["@KAV"] === "1");
console.log(result);filter 的文档
【讨论】：
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