Shell Programming and Scripting

Fruit : Price : Quantity
apple : 20 : 40
chiku : 40 :30

Hey guys, i have written a code using sed to delete a specific char which is being typed in. But the problem i am having is , how can i expand my coding to actually allow it do delete the whole row. For example, if i type in apple, i would like it to delete the other information about apple such as price and quantity.

Code:

Title=
echo -n "Title "
read Title
  
cat database | \

sed -e '/ "$Title" /d' > database

Can sombody help me in giving me a headstart on how i am able to expand this coding to include it to delete the entire row?

One way to do this would be to write all lines except the ones containing $Title to a temp file, then rename the temp file to the original. You can do this using "grep -v":

Code:

grep -v "$Title" database > database.tmp
mv database.tmp database

it did work. but the issue is , that it only deletes the "$Title" and not the entire row. I tried something out.

Code:

Title=
echo -n "Title:"
read Title  
#cat fruit | \
#sed -e '/apple/d' > fruit

grep -v "$Title , $2  , $3" fruit > fruit_temp
mv fruit_temp fruit

i tried to get it to read the 2 and 3 words but it does not seem to work. can sombody explain to me why?

Since your file is delimited by ":", then change your grep statement to:

Code:

grep -v "$Title : $2 : $3" fruit > fruit_temp

Nothing seemed to have happened. Am i writing the statements correctly?

Can you show us code you used to delete specific char?

okay, i used

T

Code:

itle=
echo -n "Title:"
read Title  
#grep -v "$Title" fruit > fruittemp
#mv fruittemp fruit

Actually this can be used to solve my problem because it does delete all the information in that row. but can sombody explain to why must be send the output to a new file and then rename it? cant we just send the output to the same file?