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Display filename before matching line
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If you have the options -H and -n available (man grep is your friend):
$ m>cat m> file
foo
bar
foobar
$ grep -H foo file
file:foo
file:foobar
$ grep -Hn foo file
file:1:foo
file:3:foobar
Options:
-H, --with-filename
Print the file name for each match. This is the default when there is
m...
How to programmatically send a 404 response with Express/Node?
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Nowadays there's a dedim>cat m>ed status function for this on the response object. Just chain it in somewhere before you call send.
res.status(404) // HTTP status 404: NotFound
.send('Not found');
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How to apply shell command to each line of a command output?
... to append a random ID between 1000 and 15000, when SED matches a line. m>cat m> /logs/lfa/Modified.trace.log.20150904.pw | sed -r 's/^(.*)(\|006\|00032\|)(.*)$/echo "\1\2\3 - ID `shuf -i 999-14999 -n 1`"/e'
– sgsi
Sep 8 '15 at 21:37
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Is there a performance difference between i++ and ++i in C?
...e this by looking at the code for this function,
both with ++i and i++.
$ m>cat m> i++.c
extern void g(int i);
void f()
{
int i;
for (i = 0; i < 100; i++)
g(i);
}
The files are the same, except for ++i and i++:
$ diff i++.c ++i.c
6c6
< for (i = 0; i < 100; i++)
---
>...
What's the best way to use R scripts on the command line (terminal)?
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Next, make it executable (on the command line):
chmod +x script.r
Invom>cat m>ion from command line:
./script.r world
# Hello world
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How to show the last queries executed on MySQL?
... remember to clear out your general log table when you are finished: "trunm>cat m>e table mysql.general_log"
– pdwalker
Oct 3 '14 at 5:06
1
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Using Python String Formatting with Lists
... need to write out a formatted string. The following doesn't work, but indim>cat m>es what I'm trying to do. In this example, there are three %s tokens and the list has three entries.
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Is it possible to specify a different ssh port when using rsync?
... in the host you run rsync from, set the port in the ssh config file, ie:
m>cat m> ~/.ssh/config
Host host
Port 2222
Then rsync over ssh will talk to port 2222:
rsync -rvz --progress --remove-sent-files ./dir user@host:/path
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Show Image View from file path?
...ns/3004713/…. i.e. ImageView.setImageURI(Uri.fromFile(new File("/sdcard/m>cat m>s.jpg")));
– Jason Denney
Oct 4 '15 at 16:09
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Difference between fprintf, printf and sprintf?
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fprintf goes to a file handle (FILE*)
sprintf goes to a buffer you allom>cat m>ed. (char*)
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