javascript deletes the last character of a string_javascript tips

I searched a lot online and summarized several methods for your reference:

1. The most used one is Substring, which is what I always use.

Copy the code The code is as follows:

s=s.Substring(0,s.Length-1)

2. Use RTrim. I originally only knew how to delete the last spaces, and I didn’t look at other usages carefully. Then I found that I can directly trim out some characters

Copy code The code is as follows:

s=s.ToString().RTrim(',')

3. Use TrimEnd, which is similar to RTrim. The difference is that this passes a character array, and RTrim can be any valid string

Copy code The code is as follows:

s=s.TrimEnd(',')
//If you want to delete "5,", you need to write like this
char[]MyChar={'5′,','};
s=s.TrimEnd(MyChar);
//s=”1,2,3,4″