這里分享一個處理連續數據的兩個辦法，記錄一下，說不定自己以后還會遇到。

（1）純數組類型

如代碼，將里面連續相同的數字找出來

oldArr = [1,1,,2,3,3,3,7,8,9,15,17,17,18,19,19,19];function fn(arr){var result = [],i = 0;result[i] = [arr[0]];arr.reduce(function(prev, cur){cur === prev ? result[i].push(cur) : result[++i] = [cur];return cur;});return result; }fn(oldArr);

執行結果：

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（2）數組對象類型

將數組對象中連續cupName相同的數據找出來

var newdata = [ {"duration": 48, "dataSource": 3, "cupName": "對戰平臺測試組", "roundRemark": "" }, {"duration": 27, "dataSource": 3, "cupName": "對戰平臺測試組", "roundRemark": "" }, { "duration": 35, "dataSource": 3, "cupName": null, "roundRemark": null }, { "duration": 25, "dataSource": 1, "cupName": null, "roundRemark": null } ];function fn2(arr){var result = [],i = 0;result[i] = [arr[0]];arr.reduce(function(prev, cur){cur.cupName === prev.cupName ? result[i].push(cur) : result[++i] = [cur];return cur;});return result; }fn2(newdata);

執行結果：

（3）實用場景

那有什么實用場景呢？
如下圖數據，這里呢，需要給每個cupName 相同，且dataSource =3的連續數據，頭部加一個logo,底部和其他數據分開。

思路：

1、將連續的數據找出來，轉換成一個二維數組

fns2(arr) {var result = [],i = 0;result[i] = [arr[0]];arr.reduce(function(prev, cur) {cur.cupName === prev.cupName ? result[i].push(cur) : (result[++i] = [cur]);return cur;});return result;}

想要得到的結果：

[[{"duration": 48,"dataSource": 3,"cupName": "對戰平臺測試組","roundRemark": ""},{"duration": 27,"dataSource": 3,"cupName": "對戰平臺測試組","roundRemark": ""}],[{"duration": 35,"dataSource": 3,"cupName": null,"roundRemark": null},{"duration": 25,"dataSource": 1,"cupName": null,"roundRemark": null}] ]

2、 為連續數據的頭和尾添加標志（頭是添加logo,尾是隔開和其他數據）

addHeadAndTail(data) {data.forEach((v) => {//只有一個元素if (v.length === 1) {if (v[0].cupName && v[0].dataSource === 3) {v[0].head = true;v[0].end = true;}//包含多個元素} else {v.forEach((k) => {if (k.cupName && k.dataSource === 3) {v[0].head = true;v[v.length - 1].end = true;}});}});return data; }

想要得到的結果：

[[{"head ":true,"duration": 48,"dataSource": 3,"cupName": "對戰平臺測試組","roundRemark": ""，},{"end ":true,"duration": 27,"dataSource": 3,"cupName": "對戰平臺測試組","roundRemark": ""}],[{"duration": 35,"dataSource": 3,"cupName": null,"roundRemark": null},{"duration": 25,"dataSource": 1,"cupName": null,"roundRemark": null}] ]

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3、 將數據在展開為原來的形式

let data2 = this.addHeadAndTail(data1);let data3 = []; data2.forEach((v) => {data3.push(...v);});

想要得到的結果：

[{"head ":true,"duration": 48,"dataSource": 3,"cupName": "對戰平臺測試組","roundRemark": ""，},{"end ":true,"duration": 27,"dataSource": 3,"cupName": "對戰平臺測試組","roundRemark": ""},{"duration": 35,"dataSource": 3,"cupName": null,"roundRemark": null},{"duration": 25,"dataSource": 1,"cupName": null,"roundRemark": null} ]

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