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Why is Scala's immutable Set not covariant in its type?
EDIT : Re-written this question based on original answer
3 Answers
3
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How do I call setattr() on the current module?
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import sys
thismodule = sys.modules[__name__]
setattr(thismodule, name, value)
or, without using setattr (which breaks the letter of the question but satisfies the same practical purposes;-):
globals()[name] = value
Note:...
Random float number generation
... random numbers in any arbitrary interval you choose. This is sufficient for learning purposes and toy programs. If you need truly random numbers with normal distribution, you'll need to employ a more advanced method.
This will generate a number from 0.0 to 1.0, inclusive.
float r = static_cas...
Python __call__ special method practical example
...se this special method, because one can simply create a new method and perform the same operation done in __call__ method and instead of calling the instance, you can call the method.
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Make Font Awesome icons in a circle?
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i.fa {
display: inline-block;
border-radius: 60px;
box-shadow: 0px 0px 2px #888;
padding: 0.5em 0.6em;
}
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" />
<i class="fa fa-wrench...
Most efficient way to check for DBNull and then assign to a variable?
This question comes up occasionally, but I haven't seen a satisfactory answer.
15 Answers
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How do I access the ModelState from within my View (aspx page)?
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Also worthy to note that you can just do ViewData.ModelState and if you want to display some conditional markup on errors you can do like this: @if (!ViewData.ModelState.IsValid)
– The Muffin Man
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Static method behavior in multi-threaded environment in java
...ant's answer is good. But I thought I would try and explain at a slightly more simple level for anybody who comes across this and is newish to Java. Here goes..
Memory in java is split up into two kinds - the heap and the stacks. The heap is where all the objects live and the stacks are where the t...
Convert a RGB Color Value to a Hexadecimal String
In my Java application, I was able to get the Color of a JButton in terms of red, green and blue; I have stored these values in three int s.
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Automating “enter” keypresses for bash script generating ssh keys
...me as two of the enters in an interactive script)
-f my.key tells it to store the key into my.key (change as you see fit).
The whole thing runs without you needing to supply any enter keys :)
To send enters to an interactive script:
echo -e "\n\n\n" | ssh-keygen -t rsa
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