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Command to get nth line of STDOUT
...ssage:
ls -l | sed -n -e '2{p;q}'
I've seen that often enough that I usually use the first (which is easier to type, anyway), though ls is not a command that complains when it gets SIGPIPE.
For a range of lines:
ls -l | sed -n 2,4p
For several ranges of lines:
ls -l | sed -n -e 2,4p -e 20,30...
How to find reason of failed Build without any error or warning
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Excellent find Richard - Really useful information when you set both verbosity levels to diagnostic
– Dai Bok
Oct 20 '16 at 8:38
3
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CORS: Cannot use wildcard in Access-Control-Allow-Origin when credentials flag is true
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This is a part of security, you cannot do that. If you want to allow credentials then your Access-Control-Allow-Origin must not use *. You will have to specify the exact protocol + domain + port. For reference see these questions :
Access-Control-Allow-Origin wildcard subdomains, ports...
AES vs Blowfish for file encryption
...was what became AES.
Interesting aside: at one point in the competition, all the entrants were asked to give their opinion of how the ciphers ranked. It's probably no surprise that each team picked its own entry as the best -- but every other team picked Rijndael as the second best.
That said, th...
intellij - spring is not being recognized (Unmapped Spring configuration)
I am using IntelliJ IDEA and all plugins for Spring are activated,
but when I load my Maven project I have the following error:
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pytest: assert almost equal
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I noticed that this question specifically asked about py.test. py.test 3.0 includes an approx() function (well, really class) that is very useful for this purpose.
import pytest
assert 2.2 == pytest.approx(2.3)
# fails, default is ± 2.3e-06
assert 2.2 == pyte...
Telling gcc directly to link a library statically
...-Bstatic in order to tell gcc which libraries I want to link with statically. After all I'm telling gcc directly all other information about linking with libraries ( -Ldir , -llibname ).
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Context switches much slower in new linux kernels
...and dances to its own tune. In other words, even if you completely disable all C states in your PC's (or server's) BIOS, this driver will still force them on during periods of brief inactivity, which are almost always happening unless an all core consuming synthetic benchmark (e.g., stress) is runni...
F12 no longer works in Visual Studio
This is driving me crazy. Ever since I installed ReSharper 4, F12 no longer seems to work. If you look at the all the ReSharper short cuts in the Goto sub menu Declaration doesn't have any assigned!
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Rounded UIView using CALayers - only some corners - How?
... CGRect rect = CGRectMake(10, 10, 200, 100);
MyView *myView = [[MyView alloc] initWithFrame:rect];
[self.view addSubview:myView];
[super viewDidLoad];
}
MyView is just a UIImageView subclass:
@interface MyView : UIImageView
{
}
I'd never used graphics contexts before, but I managed ...