I want to find index from string. How can i find t...

# android

[Vivek Modi]

I want to find index from string. How can i find the index of the first alphabet of second last word in a string.

val index = "Hey! How are you men? How you doing"

i want to search you doing from the above string, but i want y index from the word you. I did some code to find index but I am unable to find it.

fun main(vararg args: String) {
    val inputString = "Hey! How are you men? How you doing"
    val regex = "you doing".toRegex()
    val match = regex.find(inputString)!!
    println(match.value)
    println(match.range)
}

[Luke]

Your example works. Are you looking for a more generic regex?

[Vivek Modi]

yes more generic

[Vivek Modi]

I am getting the string randomly. I always want to find the index of the first alphabet of second last word in a string without match string.

[Luke]

I got "(?<= )\\w+ \\w+\\z" which works with your example, but it matches words with numbers and underscore as well

[Vivek Modi]

can you please explain @Luke

[Luke]

If you only want letters, replace both \\w with [a-zA-Z]

[Luke]

Yes, (?<= ), matches a space, but will not be part of the resulting match. It just looks that the preceding character is a space

[Luke]

\\w matches a letter (caps or not), a number or an underscore. The + after means there can be more than one

[Vivek Modi]

cool thanks a lot @Luke

[Luke]

The space matches a space of course, and \\z matches the end of a string

[Tom Hermann]

Untitled

Untitled

[Tom Hermann]

Do you want the range of where the string is, or just the start index of the substring?

If you just want the start index, I’d avoid regex and use the indexOf extension.

[Vivek Modi]

i want start index

[Vivek Modi]

thanks men