多种形式数组去重

let shortData=[]; //临时数组

this.dynamicTags //最后所需数组

// 数组去重展示

for (let i = 0; i < shortData.length; i++) {

//循环遍历当前数组  等于-1说明shortDatap[i]在所需数组中不存在

if (this.dynamicTags.indexOf(shortData[i]) == -1) {

this.dynamicTags.push(shortData[i]);

}

}

 

// 包含数组去重

//arr1父数组 arr2子数组

removePointById(arr1, arr2) {

for (let i = 0; i < arr2.length; i++) {

for (let j = 0; j < arr1.length; j++) {

if (arr2[i] == arr1[j]) {

// console.log('输出重复的内容====》',arr1[j],'输出在父数组中的下标=====>', arr1.indexOf(arr1[j]),);

let indexs = arr1.indexOf(arr1[j]);

arr1.splice(indexs, 1);

}

}

}

// console.log('arr1======>',arr1);

return arr1;

},

 

//单个数组去重

var myArr = [1,3,4,5,6,3,7,4]; console.log(myArr.filter((value,index,arr)=>arr.indexOf(value)===index)); //[ 1, 3, 4, 5, 6, 7 ]

let array=[0,3,4,5,3,4,7,8,2,2,5,4,6,7,8,0,2,0,90];[...new Set(array)]

 

//数组中根据对象的某个树形去重

let hash = {}; let shortData=[];

shortData = shortData.reduce(function(item, next) {

hash[next.id] ? "" : (hash[next.id] = true && item.push(next));

return item;

}, []);

this.WZtableData = shortData;