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Why aren't Java Collections remove methods generic?
... pass in to remove(); it only requires that they be equal. From the specification of remove(), remove(o) removes the object e such that (o==null ? e==null : o.equals(e)) is true. Note that there is nothing requiring o and e to be the same type. This follows from the fact that the equals() method tak...
Sending a mail from a linux shell script
...command.
For instance, to send the content of a file, you can do this:
$ cat /path/to/file | mail -s "your subject" your@email.com
man mail for more details.
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How do I make curl ignore the proxy?
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One note: there are other *_proxy env variables like ftp_proxy. I think, here is a full list wiki.archlinux.org/index.php/proxy_settings .
– Dmitriusan
May 12 '14 at 16:04
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Git Tag list, display commit sha1 hashes
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0e76920bea4381cfc676825f3143fdd5fcf8c21f refs/tags/1.0.0
5ce9639ead3a54bd1cc062963804e5bcfcfe1e83 refs/tags/1.1.0
591eceaf92f99f69ea402c4ca639605e60963ee6 refs/tags/1.2.0
40414f41d0fb89f7a0d2f17736a906943c05acc9 refs/tags/1.3.0
Each line is the SHA1 hash of the tag, followed by the tag name prefi...
Optimal way to concatenate/aggregate strings
...cursion Dept limitation and is easier to navigate, if done correctly and succinctly.
– GoldBishop
May 4 '17 at 18:09
F...
Is there a Unix utility to prepend timestamps to stdin?
...ash is. I didn't think there would be such an easy solution for this complicated task.
– recluze
Sep 11 '12 at 10:58
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Returning a boolean from a Bash function
...ted in the function.
Therefore, we don't have to EVER use 0 and 1 to indicate True and False. The fact that they do so is essentially trivial knowledge useful only for debugging code, interview questions, and blowing the minds of newbies.
The bash manual also says
otherwise the function’s r...
How to detect the physical connected state of a network cable/connector?
...mly generates an IP address for it. I get an "Invalid argument" error from catting the carrier
– VocoJax
Sep 12 '18 at 17:13
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How to remove/delete a large file from commit history in Git repository?
... highly useful alias. With the --name-status switch, we can see tree modifications associated with each commit.
In the “Careless” commit (whose SHA1 object name is ce36c98) the file oops.iso is the DVD-rip added by accident and removed in the next commit, cb14efd. Using the technique described ...
What's an easy way to read random line from a file in Unix command line?
...ork on any of my systems (CentOS 5.5, Mac OS 10.7.2). Also, useless use of cat, could be reduced to sort --random-sort < $FILE | head -n 1
– Steve Kehlet
Feb 16 '12 at 19:02
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