How to remove specific value from array using jQuery

Question

I have an array that looks like this  var y    1  2  3    I would like to remove 2 from array y   How can I remove a particular value from an array using jQuery  I have tried pop   but that always removes the last element

User · Answer

My version of user113716 s answer  His removes a value if no match is found  which is not good   var y    1  2  3  var removeItem   2   var i     inArray removeItem y   if  i  gt   0       y splice i  1      alert y     This now removes 1 item if a match is found  0 if no matches are found   How it works      inArray value  array  is a jQuery function which finds the first index of a value in an array The above returns -1 if the value is not found  so check that i is a valid index before we do the removal  Removing index -1 means removing the last  which isn t helpful here   splice index  count  removes count number of values starting at index  so we just want a count of 1

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I d extend the Array class with a pick and remove   function  like so   var ArrayInstanceExtensions         pick and remove  function index           var picked element   this index           this splice index 1           return picked element              extend Array prototype  ArrayInstanceExtensions     While it may seem a bit verbose  you can now call pick and remove   on any array you possibly want   Usage   array    4 5 6                gt   4 5 6  array pick and remove 1       gt  5 array                         gt   4 6    You can see all of this in pokemon-themed action here

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Remove Item in Array  var arr     jQuery    JavaScript    HTML    Ajax    Css    var itemtoRemove    HTML   arr splice   inArray itemtoRemove  arr   1

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Just to add onto the answer from Sarfraz  suprised nobody made it into a function yet   Use the answer from ddagsan using the  filter method if you have the same value more than once in your array    x000D   x000D  function arrayRemoveVal array  removeValue   x000D   var newArray   jQuery grep array  function value   return value    removeValue     x000D   return newArray  x000D    x000D  var promoItems    1 2 3 4    x000D  promoItems   arrayRemoveVal promoItems  3     removes 3 x000D  console log promoItems   x000D  promoItems   arrayRemoveVal promoItems  3     removes nothing x000D  console log promoItems   x000D   lt script src  https   cdnjs cloudflare com ajax libs jquery 1 2 3 jquery min js  gt  lt  script gt  x000D   x000D   x000D

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SUBTRACT ARRAYS      function subtractarrays array1  array2       var difference           for  var i   0  i  lt  array1 length  i               if    inArray  array1 i   array2      -1                     difference push array1 i                    return difference        You can then call the function anywhere in your code   var I like        love    sex    food    var she likes     love    food     alert   what I like and she does t like is      subtractarrays  I like  she likes        returns  Naughty  P     This works in all cases and avoids the problems in the methods above  Hope that helps

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in case somebody needs something like this   multidimensional array  two items   var ar     0  a    1  b    2  c    3  d    4  e    5  f      var removeItem   3      ar   jQuery grep ar  function n      return n 0     removeItem      or n 1  for second item in two item array     ar

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You can use  not function like this   var arr     1   2   3   5   8   var searchValue   2   var newArr     arr  not  searchValue   get

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First checks if element exists in the array     inArray id  releaseArray   gt  -1      above line returns the index of that element if it exists in the array  otherwise it returns -1    releaseArray splice   inArray id  releaseArray   1        now above line will remove this element from the array if found  To sum up the logic below is the required code to check and remove the element from array      if    inArray id  releaseArray   gt  -1                    releaseArray splice   inArray id  releaseArray   1                             else                   releaseArray push id

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To safely remove 2 from the array using vanilla JavaScript      Define polyfill for browsers that don t natively support Array indexOf   if   Array prototype indexOf      Array prototype indexOf   function searchElement  fromIndex        var k      if  this   null          throw new TypeError   this  is null or not defined              var O   Object this         len   O length  gt  gt  gt  0      if  len   0  return -1      var n    fromIndex    0      if  Math abs n    Infinity  n   0      if  n  gt   len  return -1      k   Math max n  gt   0   n   len - Math abs n   0       while  k  lt  len          if  k in O  amp  amp  O k    searchElement  return k          k            return -1             Remove first instance of 2 from array if  y indexOf 2   gt  -1      y splice y indexOf 2   1         To remove all instances of 2 from array  change  if  to  while   while  y indexOf 2   gt  -1      y splice y indexOf 2   1         console log y       Returns  1  3    Polyfill source  Mozilla

User · Answer

You can use underscore js  It really makes things simple   In your case all the code that you will have to write is -    without  1 2 3   2     and the result will be  1 3    It reduces the code that you write

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Not a jQuery way but    Why don t use simpler way  Remove  c  from following array  var a     a   b   c   d   a splice a indexOf  c   1    gt   c   a   a    b    d     You can also use   Note to myself  Don   t modify objects you don   t own   Array prototype remove   function v    this splice this indexOf v     -1   this length   this indexOf v   1     var a     a   b   c    a remove  c      value of  a  is now   a   b     Adding is simplera push  c

User · Answer

There is a simple solution with splice  According to W3School splice syntax is following    array splice index  howmany  item1         itemX    index   Required  An integer that specifies at what position to add remove items  Use negative values to specify the position from the end of the array  howmany Required  The number of items to be removed  If set to 0  no items will be removed  item1       itemX   Optional  The new item s  to be added to the array  Keep that in mind  the following js will pop one or more matched item from the given array if found  otherwise wouldn t remove the last item of the array    var x    1 2 3 4 5 4 4 6 7   var item   4  var startItemIndex     inArray item  x   var itemsFound   x filter function elem                               return elem    item                               length    Or   var itemsFound     grep x  function  elem                                  return elem    item                                length    So the final should look like the following  x splice  startItemIndex   itemsFound      Hope this helps

User · Answer

Try this it works for me   clientsSelected     10    30    12    function  removeItem    console log removeItem       clientsSelected splice   inArray removeItem   clientsSelected   1      console log  clientsSelected    enter code here

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I had a similar task where I needed to delete multiple objects at once based on a property of the objects in the array   So after a few iterations I end up with   list     grep list  function  o    return  o IsDeleted

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There is no native way to do this in Javascript  You could use a library or write a small function to do this instead  http   ejohn org blog javascript-array-remove

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With jQuery  you can do a single-line operation like this   Example  http   jsfiddle net HWKQY   y splice    inArray removeItem  y   1      Uses the native  splice   and jQuery s   inArray

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A working JSFIDDLE  You can do something like this   var y    1  2  2  3  2  var removeItem   2   y   jQuery grep y  function value      return value    removeItem        Result    1  3    http   snipplr com view 14381 remove-item-from-array-with-jquery

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The second most upvoted answer here is on the closest track possible to a one-liner jQuery method of the intended behavior the OP wants  but they stumbled at the end of their code  and it has a flaw  If your item to be removed isn t actually in the array  the last item will get removed   A few have noticed this issue  and some have offered ways to loop through to guard against this  I offer the shortest  cleanest method I could find  and I have commented under their answer for the way to fix their code according to this method   var x    1  2   bye   3  4   var y    1  2  3  4   var removeItem    bye       Removing an item that exists in array x splice    inArray removeItem x     inArray removeItem x        This is the one-liner used     Removing an item that DOESN T exist in array y splice    inArray removeItem y     inArray removeItem y        Same usage  different array     OUTPUT -- both cases are expected to be  1 2 3 4  alert x     n    y     array x will remove the element  bye  easily  and array y will be untouched   The use of the argument   inArray removeItem array  as a second argument actually ends up being the length to splice  Since the item was not found  this evaluates to array splice -1 -1    which will just result in nothing being spliced    all without having to write a loop for this

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jQuery filter method is useful  This is available for Array objects   var arr    1  2  3  4  5  5    var result   arr filter function elem      return elem    5        result - gt   1 2 3 4    http   jsfiddle net emrefatih47 ar0dhvhw   In Ecmascript 6   let values    1 2 3 4 5   let evens   values filter v   gt  v   2    0   alert evens     https   jsfiddle net emrefatih47 nnn3c2fo

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This prototype function allows you to remove even array from array Array prototype remove   function x         var i      for i in this           if this i  toString      x toString                 this splice i 1                      Example of using  var arr    1 2  1 1    abc    arr remove  1 1    console log arr     1  2   abc    var arr    1 2  1 1    abc    arr remove 1   console log arr     2   1 1    abc    var arr    1 2  1 1    abc    arr remove  abc    console log arr     1  2   1 1     To use this prototype function you need to paste it in your code   Then you can apply it to any array with  dot notation    someArr remove  elem1

[jquery] How to remove specific value from array using jQuery

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