I think I have a loop $(this) issue[Answered] RSS

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  EnenDaveyBoy

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  I think I have a loop $(this) issue

  Sep 12, 2018 02:26 PM|EnenDaveyBoy|LINK

  Hi

  I in my web page I have a number of hidden fields to identify if something has been printed, these are all start with 1 of 2 strings for the id so I have this:

      var checker = true;
      //Check Packing Slips
      $("input[id^='OnePrintReference_']").each(function (i, e) {       
              if ($(this).val() === false) {
                  checker = false;
              };
      });
  
      $("input[id^='TwoPrintReference_']").each(function (i, e) {
              if ($(this).val() === false) {
                  checker = false;
              };
      });
  
  //if check == false do nothing, else do something

  However the problem is it is always returning true, even when I have used the debugger and alerts to establish that there are false values, i should I check to see if there is something to loop through as sometimes there won't be a TwoPrintReference_,and whats the best way to do this

• • Reply
  mgebhard

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  Re: I think I have a loop $(this) issue

  Sep 12, 2018 02:48 PM|mgebhard|LINK

  A hidden field value type is a string not a Boolean.  A string is never strictly equal to false.

  The following link explains the === operator.

  https://developer.mozilla.org/en-US/docs/Web/JavaScript/Equality_comparisons_and_sameness

  How are you setting the hidden fields and what is the value?  

• • Reply
  bruce (sqlwo...

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  Re: I think I have a loop $(this) issue

  Sep 12, 2018 03:50 PM|bruce (sqlwork.com)|LINK

  as .val() returns a string:

              $(this).val() === false
  

  is always false. maybe you wanted 

              if ($(this).val() === "false") {
  

  bruce (sqlwork.com)
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  Ackerly Xu

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  Re: I think I have a loop $(this) issue

  Sep 13, 2018 03:18 AM|Ackerly Xu|LINK

  Hi EnenDaveyBoy,

  As  pointed out by mgebhard and bruce (sqlwork.com), your check will always return false. 

  If you want to check whether the value of your input is "".You could write you code as follows.

   

  if ($(this).val() == false) {
                  checker = false;
              };

  Or directly 

   if ($(this).val()) {
                  checker = false;
              };

  For more information  falsy value, please refer to https://developer.mozilla.org/en-US/docs/Glossary/Falsy

  Best regards,

  Ackerly Xu

  MSDN Community Support
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• • Reply
  EnenDaveyBoy

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  Re: I think I have a loop $(this) issue

  Sep 13, 2018 11:55 AM|EnenDaveyBoy|LINK

  thanks for the replies.