CareerCup

1. Open those files that have www.amazon.com by grep -l command.
2. Use 'sed' command tool with -e option s/www.amazon.com/www.amazon.com?id=123 on these files

We can use inverted apostrophe (`) to use the output of one command to replace it in the other command.

seems like you do really difficult stuff at school. would like so much to be in your school

What do they want? A fast algorithm or implementation?

It can be done in perl just like that. I don't quite understand what the question is about.

I didn't get this question. Can anyone clarify please?

If the change needs to be done on all the pages on internet then its not possible as we won't have access to modify the pages. In case, we do have the access, then I guess we need to search for the hyperlink using some fast algo like Boyer's Moore Algorithm for string matching and replace it.

However I guess better would have been to keep amazon.com and when the request comes to the default page on amazon simply redirect it to amazon.com?id=123 but I know thats not what's being asked here.

grep -r -l 'www.amazon.com' | sed -e 's/www.amazon.com/www.amazon.com?id=123/g'

grep -i 'www.amazon.com' * | sed -e 's/www.amazon.com/www.amazon.com?id=123/g'

1. Open those files that have www.amazon.com by grep -l command.
2. Use 'sed' command tool with -e option s/www.amazon.com/www.amazon.com?id=123 on these files ..

wouldnt this change only the first occurance of www.amazon.com to www.amazon.com?123 ....

I think...
2. Use 'sed' command tool with -e option "s/www.amazon.com/www.amazon.com?id=123/g " will make a global change to the file...

Please correct me if I am worng .. thnks

But it will cause an error if the original string was like www.amazon.com?id=456/g

make a program to recurse every every link in the website. be aware that some links might be generated dynamically through javascript, 'hidden post action' and inputting some string to inputbox.

amazon.com

hi i did this in school. u dumb ppl ,

i did this in school. dumb ques.