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How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
...Which gives you descriptions of all TTY devices known to the system. A trimmed down example:
# ll /sys/class/tty/ttyUSB*
lrwxrwxrwx 1 root root 0 2012-03-28 20:43 /sys/class/tty/ttyUSB0 -> ../../devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4:1.0/ttyUSB0/tty/ttyUSB0/
lrwxrwxrwx 1 root root ...
Verify a certificate chain using openssl verify
...
From verify documentation:
If a certificate is found which is its own issuer it is assumed to be the root CA.
In other words, root CA needs to self signed for verify to work. This is why your second command didn't work. Try this instead:
o...
Comparing Java enum members: == or equals()?
...compiled to classes with private constructors and a bunch of public static members. When comparing two members of a given enum, I've always used .equals() , e.g.
...
Effect of NOLOCK hint in SELECT statements
...lect.
Why would this be?
NOLOCK typically (depending on your DB engine) means give me your data, and I don't care what state it is in, and don't bother holding it still while you read from it. It is all at once faster, less resource-intensive, and very very dangerous.
You should be warned to ne...
How to send POST request in JSON using HTTPClient in Android?
...dge in general. I know there are plenty of examples out there but could someone point me to an actual tutorial? I'm looking for a step by step process with code and explanation of why you do each step, or of what that step does. It doesn't need to be a complicated, simple will suffice.
...
Directive isolate scope with ng-repeat scope in AngularJS
...
Okay, through a lot of the comments above, I have discovered the confusion. First, a couple of points of clarification:
ngRepeat does not affect your chosen isolate scope
the parameters passed into ngRepeat for use on your directive's attributes do use ...
'any' vs 'Object'
... more restrictive than any. For example:
let a: any;
let b: Object;
a.nomethod(); // Transpiles just fine
b.nomethod(); // Error: Property 'nomethod' does not exist on type 'Object'.
The Object class does not have a nomethod() function, therefore the transpiler will generate an error telling yo...
Best Practice for Exception Handling in a Windows Forms Application?
...mple as wrapping Main() in a try/catch, failing fast with a graceful error message to the user. This is the "last resort" exception handler.
Preemptive checks are always correct if feasible, but not always perfect. For example, between the code where you check for a file's existence and the next li...
64-bit version of Boost for 64-bit windows
...d notes for having VS .NET 2008 32-bit and 64-bit boost libraries in the same hierarchy (which is I suspect a common use case):
Build the win32 binaries
bjam --toolset=msvc-9.0 --build-type=complete stage
Create the directory lib\win32
Move the contents of stage\lib to lib\win32
Remove the direc...
Haskell: How is pronounced? [closed]
...e we get functors and monads. The use of these terms in Haskell diverges somewhat from the formal mathematical definitions, but they're usually close enough to be good descriptive terms anyway.
The Applicative type class sits somewhere between Functor and Monad, so one would expect it to have a sim...