How vue.js traverses an array-Vue.js-php.cn

How vue.js traverses an array

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Release： 2020-11-26 15:24:01

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Vue.js method of traversing arrays: 1. Use a foreach loop, the code is [this.urls.forEach(item =>]; 2. Use a filter loop, the code is [return this.urls.filter (item =>】.

How vue.js traverses an array

##This method is suitable for all brands of computers

vue.js method of traversing arrays:

1, foreach

Return cannot be used for foreach loops To stop the loop

search(keyword){
    var newList = []
    this.urls.forEach(item =>{
     if(item.name.indexOf(keyword) != -1){
      newList.push(item)
     }
    })
    return newList
   }

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2、filter

The item object is an element in the traversed array, and includes is a new method in es6. The search method directly returns the new array

search(keyword){
    return this.urls.filter(item =>{
     if(item.name.includes(keyword)){
      return item
   }
 })
}

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3, findIndex

After returning true, the index can obtain the matching elements and delete them

del(row){
     this.$confirm("确定要删除吗？", "删除").then(action=>{
     var index = this.urls.findIndex(item =>{
      if(item.name == row.name){
       return true;
      }
     })
     this.urls.splice(index, 1)
});

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4, some

If the match is successful, return true and jump out of the some loop

del(row){
    this.$confirm("确定要删除吗？", "删除").then(action=>{
      this.urls.some((item, i) =>{
      if(item.name == row.name){
       this.urls.splice(i, 1)
       return true;
      }
     }) 
  });
}

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5. In the above example, in Store a fixed array in a vue data, traverse the array, implement search function, delete function

In el-table: bind a method in data, and perform fixed array urls in the method Traverse and return a new array to implement the search function

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6. The rendering is

How vue.js traverses an array

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