more builtins lectures

[qknight]

the tour of nix is about 'nix' programming and it shows builtins and sometimes lib functions (from nixpkgs import).

this here focues more on builtins:

nix-repl

• break v

lists & attrs

• concatLists lists

• concatMap f list

• concatStringsSep separator list

• foldl' op nul list

• genList generator length

• genericClosure attrset

• groupBy f list

• hasAttr s set vs. ?

• mapAttrs f attrset in the map series

• partition pred list

string stuff

• match regex str
• stringLength e
• substring start len s
• sub e1 e2
• toString e and then hash it hashString type s
• fromTOML e

typing

• typeOf e