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delete all characters that aren't a letter or number

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# 1  
Old 01-21-2012
MySQL delete all characters that aren't a letter or number
hey Smilie

if i have a variable that is

example=lewisdenny(copywrite symbol)

so its not a nomal letter but a symbol, how can i remove everything in the varible that isnt letter or number thanks Smilie

and as a side little question do you know how to remove .zip from a file like if i

Code:
ls /temp
test.zip

how can i remove the .zip and set it as a varable like this?
Code:
example=$(ls /temp | grep (command to remove .zip)

thanks
# 2  
Old 01-21-2012
Remove numbers and letters
Code:
variable=$(printf "$variable" | sed 's/[0-9a-zA-Z]//g')

Remove zip extension
Code:
variable=$(printf "$variable" | sed 's/\.zip$//g')

# 3  
Old 01-21-2012
You can try % or %%. ${variable%%.*}
# 4  
Old 01-21-2012
Not in all shells:
Code:
variable=${variable/%\.zip}

---------- Post updated at 11:53 AM ---------- Previous update was at 11:49 AM ----------

What you're looking for:
Code:
 example=$(ls /temp | sed 's/\.zip$//')

# 5  
Old 01-21-2012
thanks
thanks for the answers but im trying to remove everything BUT the letters and numbers Smilie
# 6  
Old 01-21-2012
Sorry lad, I was almost sleeping!!! Hahaha

---------- Post updated at 01:09 PM ---------- Previous update was at 12:54 PM ----------

This leaves only the letters and numbers (removes ©...):

Code:
$ example=lewisdenny©
$ echo $example
lewisdenny©
$ example=$(printf "$example" | sed 's/[^0-9a-zA-Z]//g')
$ echo $example
lewisdenny

Last edited by teresaejunior; 01-21-2012 at 11:07 AM..
This User Gave Thanks to teresaejunior For This Post:
lewisdenny
# 7  
Old 01-21-2012
You could also use the POSIX character class "[:alnum:]" like so -

Code:
$
$ echo $str
lewisdenny©
$
$ str=$(echo $str | sed 's/[^[:alnum:]]//g')
$
$ echo $str
lewisdenny
$
$

tyler_durden
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