JavaScript-过滤字符串数组 [英] JavaScript - Filtering an array of strings

问题描述

我有一个从csv文件返回的数据数组。我试图根据数组中的标题来过滤出数组的每个索引。例如：

I have an array of arrays of data returning to me back from a csv file. I am attempting to filter out each index of an array depending on which title is in the array. For example:

如果数组的索引名为零售，则返回包含某些值的整个索引。

If an index of the array has the name "Retail" return that entire index which includes some values.

这是我的数组：

[     
    ​​[
     "Retail",
    ​​
     "22,477",
    ​​
     "24,549",
    ​​
     "19,580",
    ​​
     "15,358",
    ​​],       ​    ​
     [ 
      "Online", 

      "8,653", 

      "7,586",

      "2,432",

      "4,321"
    ],

     [ 
         "In Store", 

          "2,532", 

          "2,836", 

          "5,632",

          "7,325" 
     ]
]

我尝试过这两种方式都返回0数组：

I've attempted these two separate ways and both are returning an array of 0:

filtArr = dataList.filter(name => name.includes('Retail')) //expecting the array length 5 with "Retail" and it's values

attempt 2

attempt 2

 filtArr = dataList.filter(function (name) {
    return (name === "Retail")
})

预期收益为： console.log（filtArr）// [0.零售，1. 22,477，2. 24,549，3. 19,580，4. 15,358

推荐答案

检查数组是否包含某些项目的一种好方法是使用indexOf方法对其进行测试。
如果找不到该项目或其索引，它将返回-1。

A good way to check if an array contains some item is to test it with the indexOf method. It will return -1 if the item is not found or else its index.

您可以执行以下操作以在其中存储所有包含零售的数组：

You could do this to store all arrays containing 'Retail' in them:

let retailArrays = [];
arrayOfArrays.forEach( 
    array => {
        if( array.indexOf('Retail') !== -1) {
        retailArrays.push(array);
        };
    }
)

这篇关于JavaScript-过滤字符串数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！