Convert array to string in NodeJS

Question

I want to convert an array to string in NodeJS   var aa   new Array    aa  a      aaa   aa  b      bbb    console log aa toString       But it doesn t work  Anyone knows how to convert

User · Answer

toString is a function  not a property  You ll want this   console log aa toString       Alternatively  use join to specify the separator  toString       join        console log aa join   and

User · Answer

In node  you can just say   console log aa    and it will format it as it should   If you need to use the resulting string you should use   JSON stringify aa

User · Answer

You can also cast an array to a string like    newStr   String aa    I also agree with Tor Valamo s answer  console log should have no problem with arrays  no need to convert to a string unless you re debugging something or just curious

User · Answer

toString is a method  so you should add parenthesis    to make the function call    gt  a    1 2 3    1  2  3    gt  a toString    1 2 3    Besides  if you want to use strings as keys  then you should consider using a Object instead of Array  and use JSON stringify to return a string    gt  var aa       gt  aa  a      aaa   gt  JSON stringify aa     a   aaa   b   bbb

User · Answer

You re using an Array like an  associative array   which does not exist in JavaScript  Use an Object      instead   If you are going to continue with an array  realize that toString   will join all the numbered properties together separated by a comma   the same as  join         Properties like a and b will not come up using this method because they are not in the numeric indexes   ie  the  body  of the array   In JavaScript  Array inherits from Object  so you can add and delete properties on it like any other object  So for an array  the numbered properties  they re technically just strings under the hood  are what counts in methods like  toString     join    etc  Your other properties are still there and very much accessible      Read Mozilla s documentation for more information about Arrays   var aa           these are now properties of the object  but not part of the  array body  aa a    A   aa b    B       these are part of the array s body contents aa 0     foo   aa 1     bar    aa toString       most browsers will say  foo bar  -- the same as  join

[node.js] Convert array to string in NodeJS

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