Renaming multiple files from filnames within a text file

lt1776 · 02-24-2010, 12:41 PM

Colucix,

Can you explain what the 'i' variable is doing in this code? I know that it works but i don't understand what is going on.

Quote:

for ((i=0; i < ${#orignames[*]} ; i++))

Specifically, I don't understand what this section means:

Quote:

i < ${#orignames[*]}

I understand that '${#orignames[*]}' returns the length of the array, but in don't understand what 'i < ${#orignames[*]}' means.

Also I assume that

Quote:

i++

means add 1 to the variable 'i' each time the loop runs. Is that correct?

pixellany · 02-24-2010, 12:46 PM

First, it sets i=0
Then, the loop runs as long as the test (i< stuff) is true ( "<" in this context means "less than" )

i++ does exactly what you guessed

lt1776 · 02-24-2010, 01:52 PM

I like that. Thanks

schneidz · 02-24-2010, 03:33 PM

sorry i havent read many of the responses but this seems to be close to what you want: [untested]

Code:

for item in "`paste old-file-names.txt new-file-names.txt`"
do
 mv "$item"
done