preload executable binaries into array by looping through directories in $PATH

load_binaries_into_array

# for loop on directories in PATH 
for foo in ${PATH//:/ }; do

done

# use mapfile to load binaries
# just loads up element 0
mapfile _binary <${PATH//:/\/\* }

readarray = mapfile != hash


for foo in * ; do
test -f “$x” || continue
COMMAND “$x”
done

while IFS=: read -r $PATH;
do
      #do something with "$f"
      rm -f "$f"
done 

# source: https://gist.github.com/forquare/4637753f3c3c742aab63#file-whenceman-command



# whenceman to find man pages
function whenceman {
  for i in "$(echo $MANPATH)" | sed "s/:/ /g"`; do
    "$(find $i 2>/dev/null | grep -i $@)"
  done
}

# whence
# pass binary names as parameters
whence() {
    for i in "$(echo $PATH | sed "s/:/ /g")"; do
        "$(ls $i/$@ 2>/dev/null)"
    done
}