how to remove key value from hash in javascript

Question

Given  var myHash   new Array    myHash  key1       Name   Object 1     myHash  key2       Name   Object 2     myHash  key3       Name   Object 3       How do I remove key2  and object 2 from the hash  so that it ends up in a state as if I did   var myHash   new Array    myHash  key1       Name   Object 1     myHash  key3       Name   Object 3       delete doesn t do what I want   delete myHash  key2      simply gives me this   var myHash   new Array    myHash  key1       Name   Object 1     myhash  key2     null  myHash  key3       Name   Object 3       the only docs I can find on splice and slice deal with integer indexers  which I don t have   Edit  I also do not know that  key2  is necessarily in position  1   UPDATE  OK slight red herring  delete does seem to do what I want on the surface  however  I m using json2 js to stringify my object to json for pushing back to the server   after I ve deleted  myHash gets serialized as       Name   Object 1     null    Name   Object 3        Is this a bug in json2 js  or is it something I m doing wrong with delete   Thanks

User · Accepted Answer

You re looking for delete   delete myhash  key2     See the Core Javascript Guide

User · Answer

Another option may be this John Resig remove method  can better fit what you need  if you know the index in the array

User · Answer

Why do you use new Array    for hash  You need to use new Object   instead    And i think you will get what you want

User · Answer

You say you don t necessarily know that  key2  is in position  1   Well  it s not  Position 1 would be occupied by myHash 1    You re abusing JavaScript arrays  which  like functions  allow key value hashes  Even though JavaScript allows it  it does not give you facilities to deal with it  as a language designed for associative arrays would  JavaScript s array methods work with the numbered properties only   The first thing you should do is switch to objects rather than arrays  You don t have a good reason to use an array here rather than an object  so don t do it  If you want to use an array  just number the elements and give up on the idea of hashes  The intent of an array is to hold information which can be indexed into numerically   You can  of course  put a hash  object  into an array if you like   myhash 1    key1   brightOrangeMonkey

[javascript] how to remove key+value from hash in javascript

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