How to find all empty files and folders in a specific directory including files which just look empty but are not?

From man find

    -empty File is empty and is either a regular file or a directory.

So to find both empty files and directories it is sufficient to do

find ~/lists -empty

To indicate the type, you could use the %y output format specifier

          %y     File's type (like in ls -l), U=unknown type (shouldn't happen)

e.g.

find ~/lists -empty -printf '%y %p\n'

or make use of an external program like ls, which includes a --classify option

    -F, --classify
          append indicator (one of */=>@|) to entries

i.e.

find ~/lists -empty -exec ls -Fd {} \;

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If your definition of 'empty' is expanded to include files containing only whitespace characters, then it becomes more complicated - and more computationally intensive, since now you need to actually open at least any non-empty files and examine their contents. The most efficient way I can think of off the top of my head would be something like

find ~/list \( -empty -o \( -type f -a ! -exec grep -qm1 '[^[:blank:]]' {} \; \) \) -exec ls -Fd {} \;

(either empty, OR a file AND grep does not detect at least one non-blank character). Likely there is a better way though.

From ~/list folder:

find . -empty -type d

for listing empty directories and

find . -empty -type f

for listing empty files.

find . -type f -exec bash -c 'if [ `cat "{}" |wc -w` -eq 0 ]; then echo "file - {}";fi' \; -or -empty -exec bash -c "echo dir - {}" \; 

for listing empty folders and files including whitespaces and empty lines