javascript - regex test How to return only exact match - Stack Overflow

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I have this code:

    var search_term = postAdminID

    // Wildcards Search
    var search = new RegExp(search_term, "i");
    sdsFilter = $.grep(sdsInfo.products, function(element, index) {
        var sted = search.exec(element.AdminID)

        return sted;

postAdminID is the index of a spesific post in an array.

element.AdminID is the corresponding index I am seraching for.

PROBLEM: Whenever I try to execute this search I get every matching index also parts of indexes matched.

Lets say I want to retrieve index #78. The above code returns: 78, 178, 278, 10078 and so forth. I only want the exact index - not every index containing the index.

I have tried .exec and test I have looked in every post here on stackoverflow that I can find.

Please help. How can I specify for regex that it should only look for the entire "string" ?

I have this code:

    var search_term = postAdminID

    // Wildcards Search
    var search = new RegExp(search_term, "i");
    sdsFilter = $.grep(sdsInfo.products, function(element, index) {
        var sted = search.exec(element.AdminID)

        return sted;

postAdminID is the index of a spesific post in an array.

element.AdminID is the corresponding index I am seraching for.

PROBLEM: Whenever I try to execute this search I get every matching index also parts of indexes matched.

Lets say I want to retrieve index #78. The above code returns: 78, 178, 278, 10078 and so forth. I only want the exact index - not every index containing the index.

I have tried .exec and test I have looked in every post here on stackoverflow that I can find.

Please help. How can I specify for regex that it should only look for the entire "string" ?

• javascript
• jquery
• regex
• testing
• exec

Share Improve this question Follow asked May 30, 2017 at 15:06 XanderManXanderMan 14311 silver badge1515 bronze badges 3

• 1 What does the string you are trying to match look like? – atomrc Commented May 30, 2017 at 15:10
• I'm assuming you're trying to find one in a list? You would need to add whatever you're using to delimit the items to the search pattern, otherwise it's executing globally because it's treating it as a search souce: MDN – Patrick Barr Commented May 30, 2017 at 15:11
• What does search_term include? Edit your question and include necessary details. A bit of code does no good without the regex pattern and sample data. – C Perkins Commented May 30, 2017 at 20:00

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3 Answers 3

Sorted by: Reset to default 5

The issue is the search pattern you are using.

In REGEX you can match the beginning and the end of the line (of the string in the case of a single-line string). For this, add ^ at the beginning of the search pattern, and $ at the end.

For example ^78$ will only match the index 78, not 178,278...

If you're looking in a string with delimiters that contains many indexes, you will have to add the delimited in the search pattern, or split the string and search its elementary element.

Try this regex :
\b78\b

\b will make sure this is only 78, and not a number containing 78.
In your case, search_term should be :
var search_term = "\b"+postAdminID+"\b"

Thank you for your input. Both suggestions did make things work. Except that they restricted use of the script for other purposes. I wanted to use one search algorithm for more than just integer keys.

In the end I ended up with this script, using: return element.AdminID == postAdminID;

var search_term = postAdminID

// Wildcards Search
var search = new RegExp(search_term, "i");
sdsFilter = $.grep(sdsInfo.products, function(element, index) {
    var sted = search.exec(element.AdminID)
    return element.AdminID == postAdminID;
}); 

I also added several search.exec to the mix in order for my script to bee more versatile and flexible. But thank you again for your valuble input.

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