data encoding: homework 13 on Monday                                                                
                                                                                                    
jeremy@core:~$ cat a                                                                                
asdf:5                                                                                              
asdf:6                                                                                              
oiwjeo:7                                                                                            
jeremy@core:~$ cat b                                                                                
asdf:9                                                                                              
jooijio:7                                                                                           
jeremy@core:~$ cat a b |sort |(echo "declare -A count" && sed -e 's/\(.*\):\(.*\)/let "\1+=\2"\n((co
nstances:\$((count[\$i])); done")|bash                                                              
asdf:20 instances:3                                                                                 
oiwjeo:7 instances:1                                                                                
jooijio:7 instances:1                                                                               
jeremy@core:~$                                                                                      

cho "for i in \"\${!count[@]}\"; do echo \$i:\$((\$i)) instances:\$((count[\$i])); done")           
declare -A count                                                                                    
let "asdf+=5"                                                                                       
((count["asdf"]++))                                                                                 
let "asdf+=6"                                                                                       
((count["asdf"]++))                                                                                 
let "asdf+=9"                                                                                       
((count["asdf"]++))                                                                                 
let "jooijio+=7"                                                                                    
((count["jooijio"]++))                                                                              
let "oiwjeo+=7"                                                                                     
((count["oiwjeo"]++))                                                                               
for i in "${!count[@]}"; do echo $i:$(($i)) instances:$((count[$i])); done                          
jeremy@core:~$ cat a b |sort |(echo "declare -A count" && sed -e 's/\(.*\):\(.*\)/let "\1+=\2"\n((co
cho "for i in \"\${!count[@]}\"; do echo \$i:\$((\$i)) instances:\$((count[\$i])); done")