JS jQuery - check if value is in array

Question

I am more of a PHP person  not JS - and I think my problem is more a syntax problem     I have a small jQuery to  validate  and check input value    It works ok for single words  but I need array   I am using the  inArray   of jQuery    var ar     value1    value2    value3    value4       ETC             jQuery document  ready function                  jQuery  form searchreport   submit function                 if  jQuery inArray jQuery  input first    ar                             if  jQuery  input first   val       value11        works for single words             jQuery   divResult   html   lt span gt VALUE FOUND lt  span gt    show                jQuery   contentresults   delay 800  show  slow                    return false                              SINGLE VALUE SPECIAL CASE   Value not allowed                 if  jQuery  input first   val       word10                      jQuery   divResult   html  YOU CHEAT     show                    jQuery   contentresults   delay 800  show  slow                     return false                              Value not Valid                jQuery   divResult   text  Not valid    show   fadeOut 1000                  return false                                 now - this if  jQuery inArray jQuery  input first    ar    is not working right    every value that I put will be validated as OK    even empty   I need to validate only values from the array  ar     I tried also if  jQuery inArray jQuery  input first    ar     1     1 0 -1 tried all  what am i doing wrong    Bonus question   how to do NOT in array in jQuery      the equivalent of PHP if   in array  1    a    - I sw somehre that it will not work   and need to use something like this

User · Answer

As to your bonus question  try if  jQuery inArray jQuery  input first   val    ar   lt  0

User · Answer

You are comparing a jQuery object  jQuery  input first    to strings  the elements of the array   Change the code in order to compare the input s value  wich is a string  to the array elements     if  jQuery inArray jQuery  input first   val    ar     -1    The inArray method returns -1 if the element wasn t found in the array  so as your bonus answer to how to determine if an element is not in an array  use this     if jQuery inArray el arr     -1          the element is not in the array

User · Answer

Alternate solution of the values check    Duplicate Title Entry        each ar   function  i  val            if   jQuery  input first   val     val  alert  VALUE FOUND  Valuecheck

User · Answer

The Array prototype property represents the prototype for the Array constructor and allows you to add new properties and methods to all Array objects  we can create a prototype for this purpose  Array prototype has element   function element        return   inArray  element  this      -1       And then use it like this  var numbers   1  2  3  4   numbers has element 3    gt  true numbers has element 10    gt  false   See the Demo below   x000D   x000D  Array prototype has element   function element    x000D    return   inArray element  this      -1  x000D     x000D   x000D   x000D   x000D  var numbers    1  2  3  4   x000D  console log numbers has element 3    x000D  console log numbers has element 10    x000D   lt script src  https   ajax googleapis com ajax libs jquery 2 1 1 jquery min js  gt  lt  script gt  x000D   x000D   x000D

[jquery] JS jQuery - check if value is in array

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