Split string in multiple without index-CodePudding

I have people addresses in string, what I want to do is extract city and state names from these address and store rest of the string as address. problem is I don't have any idea about how long the addresses are.

for example:

let address1 = "Akshardham Temple, Vidyut Nagar, Vaishali Nagar, Chitrakoot, Jaipur, Rajasthan"

let address2 = "Statue of Unity, Statue of Unity Road, Kevadia, Gujarat"

// and some might be just this
let address3 = "New Delhi, Delhi"

what I want is however long string is I want to extract last two entire words(state and city) and rest in another variable.

CodePudding user response：

First split the string by a comma:

const arr = address1.split(',');

This will give you an array of strings, e.g. ["Akshardham Temple", " Vidyut Nagar", " Vaishali Nagar", " Chitrakoot", " Jaipur", " Rajasthan"]

Then you can slice off the last 2 elements of the array:

const [city, state] = arr.slice(-2)

CodePudding user response：

As you say, you have to split the strings. If you want only whole words, it makes sense to use the space character as a separator.

const parts = address1.split(" ");

Now you have to access the last element and the second last element. Remember that length is always one greater than the last index.

const lastWort = parts[parts.length-1];
const secondLastWort = parts[parts.length-2];

If you are bothered by the commas in the result, you can remove them first.

address1 = address1.replaceAll(",", "");

All together:

let address1 = "Akshardham Temple, Vidyut Nagar, Vaishali Nagar, Chitrakoot, Jaipur, Rajasthan";

address1 = address1.replaceAll(",", "");

const parts = address1.split(" ");

const lastWort = parts[parts.length-1];
const secondLastWort = parts[parts.length-2];

console.log(lastWort);
console.log(secondLastWort);

CodePudding user response：

You can use split and splice. The returned elements would need a call to trim() so to avoid optional white space is dangling around the extracted words:

function splitAddress(s) {
    let parts = s.split(",");
    let [city, state] = parts.splice(-2).map(s => s.trim());
    return { address: parts.join(","), city, state };
}

let tests = [
    "Akshardham Temple, Vidyut Nagar, Vaishali Nagar, Chitrakoot, Jaipur, Rajasthan",
    "Statue of Unity, Statue of Unity Road, Kevadia, Gujarat",
    "New Delhi, Delhi"
];

for (let test of tests) {
    console.log(splitAddress(test));
}