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Functions

Find and display most recent files using find and perl

Terminal - Find and display most recent files using find and perl
find $HOME -type f -print0 | perl -0 -wn -e [email protected]=<>; foreach $file (@f){ (@el)=(stat($file)); push @el, $file; push @files,[ @el ];} @o=sort{$a->[9]<=>$b->[9]} @files; for $i (0..$#o){print scalar localtime($o[$i][9]), "\t$o[$i][-1]\n";}'|tail
2009-09-21 22:11:16
User: drewk
Functions: find perl
3
Find and display most recent files using find and perl

This pipeline will find, sort and display all files based on mtime. This could be done with find | xargs, but the find | xargs pipeline will not produce correct results if the results of find are greater than xargs command line buffer. If the xargs buffer fills, xargs processes the find results in more than one batch which is not compatible with sorting.

Note the "-print0" on find and "-0" switch for perl. This is the equivalent of using xargs. Don't you love perl?

Note that this pipeline can be easily modified to any data produced by perl's stat operator. eg, you could sort on size, hard links, creation time, etc. Look at stat and just change the '9' to what you want. Changing the '9' to a '7' for example will sort by file size. A '3' sorts by number of links....

Use head and tail at the end of the pipeline to get oldest files or most recent. Use awk or perl -wnla for further processing. Since there is a tab between the two fields, it is very easy to process.

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

A quick google reveals that "9" means "access time" http://perldoc.perl.org/functions/stat.html . To avoid the multiple batches problem in the shell, you could use find to do the stat()ing for you via -printf, and then simply pipe it into a sort (don't you love shell?):

find $HOME -type f -print "%+\t%f\n" | sort -n

this is a good approximation, although there's something different between find's notion of atime and perl's...I'm probably missing something...

Comment by bwoodacre 353 weeks and 1 day ago

I don't follow in this case.

Comment by drewk 353 weeks and 1 day ago

Sorry on previous comment. I was looking at the wrong comment...

Perl arrays are zero based, so the 10th element of the stat return is array index 9...

The command you gave find $HOME -type f -print "%+\t%f\n" | sort -n does not work on OS X. :-( When I get time, I will debug...

Comment by drewk 353 weeks and 1 day ago

Sometimes you Linux guys have all the fun. You have:

find $HOME -type f -print "%+\t%f\n" | sort -n

If think you meant:

find $HOME -type f -printf "%+\t%f\n" | sort -n

The printf option is not available on OS X (and I don't think on BSD). One could use:

find $HOME -type f -exec printf "format" {} \; | sort -n

but I have 350,000 files in $HOME, and therefor 350,000 subshells. Slow.

On Linux with -printf available as an option for find, your solution works well -- I think. I do not have Linux to test.

Comment by drewk 353 weeks ago

2016-6-7 leilei

"Tweed is an excellent fabric especially when you are living in place like London. London is known for its cold weather and in such climate, tweed works absolutely fine. One of the biggest advantages of buying a tweed suit is that you it can be worn all together or can be incorporated separately into pieces in your wardrobe. Tweed suits in London is quite famous amongst men. So let us understand, what exactly tweed fabric is.

What is Tweed?

Tweed is a warm rough to touch fabric and was originated in Scotland. The reason why tweed suits in London are famous is because of its loose weave which makes it flexible and comfortable during winters. The tweed fabric is referred to the weave of fabric; therefore when you see different kinds of tweed, it would tell you the pattern it has been woven. One of the most popular kinds of tweed is the herringbone tweed which a diagonally v-shaped black and white weave. The herringbone tweed gives a rich visual texture and known for its versatility.

Ways to wear Tweed in winters

Everybody needs to wear warm clothes during the winter month to protect from the chilly weather outside. However, many people think that they might have to compromise fashion during those chilly months. Not now! There are many fabrics that you can use to protect yourself from the weather as well as still enjoy great looks. Tweed is one of the fabrics that can make you awesome even in winters as well. Below are some ways of how you can incorporate tweed with other pieces in your wardrobe

"

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"Casually ? if you are a starter with tweed then it is recommended to start with plain variety of tweed. You can wear a tweed jacket with dark blue jeans and high boots. Incorporate a neutral t-shirt or a winter shirt under the jacket.

At work ? Tweed suit in London are quite popular as one of the formal attires. Heavy woven tweeds can make you look older, so try buying tweed suits in London that are finely weaved and pair it with your regular shirts like white or blue with smart formal shoes. Believe it or not, it can win you praise at work.

Accessorise ? Apart from wearing tweed suits in London as attire you can even use accessories made out of tweed. Tweed caps, laptop bags, scarves, gloves are a smart way to incorporate tweed in your winter collection. It is also a safe way of using tweed fabric if you are not too comfortable wearing it. There is even footwear that has tweed as their centre fabric and looks awesome.

Taking care of Tweed

Though the fabric boasts itself about being tough and rugged, it still requires a good care to use it for coming years as well. Due to its weave structure it often pick up dirt and stains that can get hard to remove. Make sure you take your tweed clothes for dry cleaning as washing them in washing machines can make them shrink. Also, keep them in cool dry place so that they do not get attracted by moths.

"

Comment by leilei3915 3 weeks and 1 day ago

Your point of view

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