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ActiveMQ or RabbitMQ or ZeroMQ or [closed]
...velopes are quite big.
ZeroMq is a very lightweight messaging system specially designed for high throughput/low latency scenarios like the one you can find in the financial world. Zmq supports many advanced messaging scenarios but contrary to RabbitMQ, you’ll have to implement most of them yourse...
How can I check if an argument is defined when starting/calling a batch file?
...ples
save it as identifier.cmd
it can identify an unlimited arguments (normally you are limited to %1-%9), just remember to wrap the arguments with inverted-commas, or use 8.3 naming, or drag&drop them over (it automatically does either of above).
this allows you to run the following commands:...
How to write a switch statement in Ruby
...sing the === operator. For example, 1..5 === x, and not x === 1..5.
This allows for sophisticated when clauses as seen above. Ranges, classes and all sorts of things can be tested for rather than just equality.
Unlike switch statements in many other languages, Ruby’s case does not have fall-thr...
insert vs emplace vs operator[] in c++ map
...ing value_type or make_pair . While there is a lot of information about all of them and questions about particular cases, I still can't understand the big picture.
So, my two questions are:
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Why are we not to throw these exceptions?
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Exception is the base type for all exceptions, and as such terribly unspecific. You shouldn’t ever throw this exception because it simply does not contain any useful information. Calling code catching for exceptions couldn’t disambiguate the intentiona...
File being used by another process after using File.Create()
...pens a FileStream on the file. So your file is already open. You don't really need the file.Create method at all:
string filePath = @"c:\somefilename.txt";
using (StreamWriter sw = new StreamWriter(filePath, true))
{
//write to the file
}
The boolean in the StreamWriter constructor will cau...
How to change plot background color?
...he stateful API (if you're doing anything more than a few lines, and especially if you have multiple plots, the object-oriented methods above make life easier because you can refer to specific figures, plot on certain axes, and customize either)
plt.plot(...)
ax = plt.gca()
Then you can use set_...
How to convert an IPv4 address into a integer in C#?
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This doesn't actually seem to make a difference on Windows using .NET - unsure about Mono. See dotnetfiddle.net/cBIOj2
– Jesse
Mar 7 '18 at 12:42
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What does Visual Studio mean by normalize inconsistent line endings?
Visual Studio occasionally tells me:
11 Answers
11
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What is the HTML tabindex attribute?
... to set the order but just make your element focusable use tabindex="0" on all such elements:
<div tabindex="0"></div>
Also, if you don't want it to be focusable via the tab key then use tabindex="-1". For example, the below link will not be focused while using tab keys to traverse.
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