Capitalize make first letter to upper Source https://www.cnblogs.com/Detector/p/9686443.html.

GenToken rand id + rand key + jwt.

GenToken userID + rand key + jwt.

IsCapitalize whether the first letter is upper.

IsNumber determine if it is a pure numeric string.

Rand generate rand string with bytes size.

Remove remove all old from s.

RemoveEmpties move all empties.

ReplaceAllIgnoreCase replace all ignore case.

SplitToChunks Split large string in n-size chunks.