Javascript tips for deleting the last character of a string _ javascript

The requirement is a string. If you want to delete the last character of the string, such as "1, 2, 3, 4, 5,", how can you use javascript to delete the last? The following three methods are provided:

1. Substring is used most, which is also used all the time.

The Code is as follows:

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

2. Using RTrim, I used to delete the last space and did not carefully read other usage before I found that I could trim some characters directly.

The Code is as follows:

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

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

The Code is as follows:

S = s. TrimEnd (',')
// Write this if you want to delete "5 ,"
Char [] MyChar = {'5 ′,','};
S = s. TrimEnd (MyChar );
// S = "1, 2, 4 ″