How to return paramer from object of array if property name include value?

Question

If i have an array:

[{month:'January', value:1},{month:'February', value:2}] and so on how can i check if month in array includes for example Jan and then return 1, Feb return 2 and so on?

Any suggestion?

Answer 1

Is this what you want? You can create a regular expression and test it.

If your search should be case insensitive, change the RegExp as follows,

const pattern = new RegExp("^" + month, 'i');

Note that ^ matches the start of a string without consuming any characters.

 const array = [{ month: 'January', value: 1 }, { month: 'February', value: 2 }]; function findValue(month) { const pattern = new RegExp("^" + month); const m = array.find(c => pattern.test(c.month)); return m && m.value || null; } console.log(findValue("Jan")) console.log(findValue("Feb"))

Answer 2

 const monthsArray = [{month:'January', value:1},{month:'February', value:2}]; const month = 'Jan'; console.log(monthsArray.find(m => m.month.includes(month)))

(credit to Hamza Khanzada in the comment).

Includes on a String property will check whether the prop has the value you are checking for in it, and will return a match or undefined.

You can leverage that further with a wrapper function as in the other answer

Answer 3

Is this what you are looking for?
This essentially does a case-insensitive search.

 let monthToFind = 'jan'; let input = [{month:'January', value:1},{month:'February', value:2}]; let result = input.find(x => x.month.toLowerCase().includes(monthToFind.toLowerCase()))?.value; console.log(result);

Answer 4

if you want to validate that the month starts with

 const months = [{ month: 'January', value: 1 }, { month: 'February', value: 2 }]; function matchMonth(intialsMonth) { return months.find(res => res.month.toLowerCase().startsWith(intialsMonth.toLowerCase())).value; } console.log(matchMonth("Jan")); console.log(matchMonth("Feb"));