How to use forEach in vueJs

Question

I have a response like below from an API call     Now  I have to repeat the whole arrays inside the arrays  How do I do that in VueJS   I have searched for using forEach   nowhere I found forEach usage like key value pair   Can anyone help me on how to fetch the values from that arrays by using either forEach or any else VueJS    Thanks  amp  Regards

User · Answer

You can also use  map   as   var list      response data message map function value  key         list push value

User · Answer

In VueJS you can loop through an array like this        const array1     a    b    c     Array from array1  forEach element   gt    console log element             in my case I want to loop through files and add their types to another array    Array from files  forEach  file    gt           if this mediaTypes image includes file type                 this media images push file               console log this media images

User · Answer

You can use native javascript function   var obj    a 1 b 2    Object keys obj  forEach function key       console log key  obj el        or create an object prototype foreach  but it usually causes issues with other frameworks  if   Object prototype forEach      Object defineProperty Object prototype   forEach         value  function  callback  thisArg          if  this    null            throw new TypeError  Not an object                  thisArg   thisArg    window        for  var key in this            if  this hasOwnProperty key               callback call thisArg  this key   key  this                                    var obj    a 1 b 2    obj forEach function key  value       console log key  value

User · Answer

The keyword you need is flatten an array  Modern javascript array comes with a flat method  You can use third party libraries like underscorejs in case you need to support older browsers   Native Ex    var response  1 2 3 4 12 15   20 21    var data response flat      data  1 2 3 4 12 15 20 21    Underscore Ex   var response  1 2 3 4 12 15   20 21    var data   flatten response

User · Answer

In VueJS you can use forEach like below   let list       each response data message  function key  value         list push key            So  now you can have all arrays into list   use for loop to get values or keys

User · Answer

This is an example of forEach usage   let arr        this myArray forEach  value  index    gt        arr push value       console log value       console log index         In this case   myArray  is an array on my data   You can also loop through an array using filter  but this one should be used if you want to get a new list with filtered elements of your array   Something like this   const newArray   this myArray filter  value  index    gt        console log value       console log index       if  value  gt  5  return true        and the same can be written as   const newArray   this myArray filter  value  index    gt  value  gt  5     Both filter and forEach are javascript methods and will work just fine with VueJs  Also  it might be interesting taking a look at this   https   developer mozilla org pt-BR docs Web JavaScript Reference Global Objects Array forEach

[javascript] How to use forEach in vueJs?

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