Question

194

javascript indexOf - exact match in a list / array

rated 0 times [ 195] [ 1] / answers: 1 / hits: 33677 / 10 Years ago, wed, november 19, 2014, 12:00:00

I decided to use javascript indexOf to determine if a value exists in a list / array. This was working for me untill I realised that I need to find an exact match in the list.

Here is my example code:

if (['eu', 'fr-CA', 'lt', 'sv', 'zh-CN', 'zh-TW'].indexOf('fr') > -1) {

The above code will 'match' fr to fr-CA, which is a problem for me, as I must have an exact match to fr and not match to fr-CA.

I thought that this would be straight forward, but I have searched SO and google, and cannot find an answer to getting the exact match.

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

alfredoc

Add To Favorites

Follow

Total Points: 261

Total Questions: 128

Total Answers: 89

Location: French Polynesia

Member since Sun, Aug 2, 2020

4 Years ago

answered 10 Years ago jadyngraysons · Accepted Answer

Thats wrong, you can use indexOf:

arr.indexOf(searchElement[, fromIndex = 0])

indexOf compares searchElement to elements of the Array using strict
equality (the same method used by the ===, or triple-equals, operator)

So ['eu', 'fr-CA', 'lt', 'sv', 'zh-CN', 'zh-TW'].indexOf('fr') returns -1.