Split string JavaScript in a specific way

Question

Hi I want to split a string in a specific way in javascript, like if the string is C:/users/Me/AppData/elastic/elastic 1.6. I know I can split it using the split() method and use pop() and shift() to get first and last splitted string but I want to split it like, except the last string. So the answer should be like “C:/users/Me/AppData/elastic"

I did it like this,

str.split(str.split("/").pop()).shift()

I got the out put like this,

C:/users/Me/AppData/

But I want it like this,

C:/users/Me/AppData

Answer 1

It sounds like you're saying that you want the final item in the path to be dropped. To do that, you can use .lastIndexOf() to get the last / position, and then .slice() up to that point if it wasn't -1 .

 var str = "C:/users/Me/AppData/elastic/elastic 1.6"; var idx = str.lastIndexOf("/"); var res = str; if (idx !== -1) { res = str.slice(0, idx); } console.log(res); 

Or like this, which is similar to your attempt, but may be slower:

 var str = "C:/users/Me/AppData/elastic/elastic 1.6"; var res = str.split("/"); res.pop(); res = res.join("/"); console.log(res); 

Your original solution does work as long as the last item doesn't appear anywhere else in the URL. Otherwise you'll get only the part before the first split item.

Answer 2

If you want regex:

var str = "C:/users/Me/AppData/elastic/elastic 1.6"; 
str = str.replace(/\/[^\/]*$/, "");

The expression reads:

1. Grab everything starting from / until the end of the string.
2. There should be no / in between.
3. Replace it with nothing