Count number of blank lines in a file

Question

In count (non-blank) lines-of-code in bash they explain how to count the number of non-empty lines.

But is there a way to count the number of blank lines in a file? By

Answer 1

To count how many useless blank lines your colleague has inserted in a project you can launch a one-line command like this:

blankLinesTotal=0; for file in $( find . -name "*.cpp" ); do blankLines=$(grep -cvE '\S' ${file}); blankLinesTotal=$[${blankLines} + ${blankLinesTotal}]; echo $file" has" ${blankLines} " empty lines."  ; done; echo "Total: "${blankLinesTotal}

This prints:

.cpp #blankLines
....
....
.cpp #blankLines
Total #blankLinesTotal