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Re: How to perform an EXACT match for an item without looping through?

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justaguy <lichunshen84@gmail.com> wrote on 18 May 2017 in
comp.lang.javascript: 

>> var e = document.getElementById('myID').value;
>> var re = new RegExp( e,'ig' );
>> var f = list.match(re);
>> 
> 
> It still fails.  I've decided to loop through the values since it's a
> small loop anyway.  Thanks tho. 

Using regex containing user-input will get you into trouble anyway,
since the user does not know about its special characters.

However a loop is NOT NEEDED, try String.search():

==============
'use strict';
let e, list = '2332,123AB45,9922';

e = '123ab45'  // = document.getElementById('myID').value;
found(e, list); // true

e = '123ab4'  // = document.getElementById('myID').value;
found(e, list); // false


function found(e, list) {
	list = ',' + list.toLowerCase() + ',';
	e = ',' + e.toLowerCase() + ',';
	let f = list.search(e) != -1;
	document.write(f);
};
==============

-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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How to perform an EXACT match for an item without looping through? justaguy <lichunshen84@gmail.com> - 2017-05-02 18:49 -0700
  Re: How to perform an EXACT match for an item without looping through? JJ <jj4public@vfemail.net> - 2017-05-03 18:36 +0700
    Re: How to perform an EXACT match for an item without looping through? justaguy <lichunshen84@gmail.com> - 2017-05-03 05:58 -0700
      Re: How to perform an EXACT match for an item without looping through? JJ <jj4public@vfemail.net> - 2017-05-04 15:03 +0700
        Re: How to perform an EXACT match for an item without looping through? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-05-04 10:57 +0200
        Re: How to perform an EXACT match for an item without looping through? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-05-05 18:40 +0200
      Re: How to perform an EXACT match for an item without looping through? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-05-05 19:59 +0200
        Re: How to perform an EXACT match for an item without looping through? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-05-06 02:10 +0200
  Re: How to perform an EXACT match for an item without looping through? John G Harris <niam@jghnorth.org.uk.invalid> - 2017-05-03 14:45 +0100
    Re: How to perform an EXACT match for an item without looping through? justaguy <lichunshen84@gmail.com> - 2017-05-03 07:12 -0700
    Re: How to perform an EXACT match for an item without looping through? justaguy <lichunshen84@gmail.com> - 2017-05-17 09:58 -0700
      Re: How to perform an EXACT match for an item without looping through? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-05-17 19:34 +0200
        Re: How to perform an EXACT match for an item without looping through? justaguy <lichunshen84@gmail.com> - 2017-05-17 11:12 -0700
          Re: How to perform an EXACT match for an item without looping through? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-05-17 20:33 +0200
            Re: How to perform an EXACT match for an item without looping through? justaguy <lichunshen84@gmail.com> - 2017-05-17 15:16 -0700
              Re: How to perform an EXACT match for an item without looping through? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-05-18 11:15 +0200
                Re: How to perform an EXACT match for an item without looping through? justaguy <lichunshen84@gmail.com> - 2017-05-19 07:58 -0700

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