CODEWITHSUNDEEP
javascriptstring
Aamir Mahmood
Aamir Mahmood

Reputation: 2724

Find multiple fragments of string in a string

I have a string of IDs in CSV format in an input box

12,23,26,32

I have to check if this string contains 23 or 24, if yes then return false, else return true

Upvotes: 0

Views: 274

Answers (5)

MikeM
MikeM

Reputation: 13631

!/(^|,)2[34](,|$)/.test( str );

or if there may be whitespace present

!/(^|,)\s*2[34]\s*(,|$)/.test( str );

The RegExp test method returns true if the string argument matches the regular expression or false if it doesn't. The ! inverts the result of the test call.

^ is the metacharacter for the start of the string, so(^|,) means either 'at the start of the string' or 'one comma character'.

It can't be written [^,] as that would mean 'one character that isn't a comma', and it can't be written [,^] as that means 'one character that is either a comma or a literal ^ character.

2[34] means 2 followed by 3 or 4.
(,|$) means a comma or the end $ of the string.
\s* means zero or more space characters.

Upvotes: 1

Hary
Hary

Reputation: 5818

var str = "12,23,26,32";

var obj = str.split(",");

var isFound = false;

for(i=0; i < obj.length; i++)
{
     if(obj[i] == "23" || obj[i] == "24")
     {
          isFound = true;
          break;
     }
}
return isFound;

Upvotes: -1

Felipe Fonseca
Felipe Fonseca

Reputation: 1129

Use indexOf. You can check if it contains a subString. If not found, it returns -1

var str = "12,23,26,32"
return !(str.indexOf("23")!=-1 || str.indexOf("24")!=-1) // Dont have 23 or 24

=======EDIT=======

Like @Matt said in comment, this solution will work also to "12,239,26,32" and thats not the point.

Make the split before check the indexOf, then you will get the element between the commas.

var array = "12,23,26,32".split(",");
return !(array.indexOf("23")!=-1 || array.indexOf("24")!=-1) // Dont have 23 or 24

Upvotes: 1

Varinder Singh
Varinder Singh

Reputation: 1590

Try this

var str = "12,23,26,32";

var isFound = (str.indexOf('23') || str.indexOf('24')) > -1;

Upvotes: 0

Fabrizio Calderan
Fabrizio Calderan

Reputation: 123387

if (/(?:^|,)(23|24)(?:,|$)/.test("12,23,26,32")) {
   /* found 23 or 24 */
}

Upvotes: 0

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