Javascript - remove an array item by value

Question

My situation   var id tag    1 2 3 78 5 6 7 8 47 34 90     I would like to delete where id tag   90 and to return   var id tag    1 2 3 78 5 6 7 8 47 34     How can I do that

User · Answer

If you re going to be using this often  and on multiple arrays   extend the Array object to create an unset function    Array prototype unset   function value        if this indexOf value     -1       Make sure the value exists         this splice this indexOf value   1               tag story unset 56

User · Answer

Here are some helper functions I use   Array contains   function  arr  key        for  var i   arr length  i--             if  arr i      key  return true            return false      Array add   function  arr  key  value        for  var i   arr length  i--             if  arr i      key  return arr key    value            this push key       Array remove   function  arr  key        for  var i   arr length  i--             if  arr i      key  return arr splice i  1

User · Answer

var id tag    1 2 3 78 5 6 7 8 47 34 90    var delete where id tag   90     id tag  id tag filter  x   gt  x  delete where id tag

User · Answer

You ll want to use JavaScript s Array splice method   var tag story    1 3 56 6 8 90       id tag   90      position   tag story indexOf id tag    if    position   tag story splice position  1     P S  For an explanation of that cool   tilde shortcut  see this post   Using a   tilde with indexOf to check for the existence of an item in an array     Note  IE  lt  9 does not support  indexOf   on arrays  If you want to make sure your code works in IE  you should use jQuery s   inArray     var tag story    1 3 56 6 8 90       id tag   90      position     inArray id tag  tag story    if    position   tag story splice position  1       If you want to support IE  lt  9 but don t already have jQuery on the page  there s no need to use it just for   inArray  You can use this polyfill instead

User · Answer

You ll want to use  indexOf   and  splice    Something like   tag story splice tag story indexOf 90  1

User · Answer

tag story splice tag story indexOf id tag   1

User · Answer

You can use lodash js    pull arrayName valueToBeRemove    In your case  -   pull id tag 90

User · Answer

function removeValue arr  value        for var i   0  i  lt  arr length  i              if arr i      value                arr splice i  1               break                      return arr      This can be called like so   removeValue tag story  90

User · Answer

As a variant  delete array array indexOf item      If you know nothing about delete operator  DON T use this

User · Answer

I like to use filter   var id tag    1 2 3 78 5 6 7 8 47 34 90       delete where id tag   90 id tag   id tag filter function x        if  x     90          return x

[javascript] Javascript - remove an array item by value

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