Progressive combination generator - Golang
I need to tag documents using a random 4-5 digit/letter combination and use it as a unique id. For eg - My combination generator generates a string "fjg4c". I will assign that fjg4c to some file location and put in google datastore. While tagging another file, I don't want to generate the same string i.e "fjg4c". An obvious solution is to generate any string at random and search if it already exists in the database. But I would like to avoid that. How can I do that ? Input set - 1,2,3,4,5,6,7,8,9,0,q,a,z,w,s,x,e,d,c,r,f,v,t,g,b,y,h,n,u,j,m,i,k,o,l,p
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