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Ruby custom error classes: inheritance of the message attribute
...ld also add more arguments to the method signature, should you need.
Overriding #to_s Strategy not #to_str, it works differently
module ExternalService
class FailedCRUDError < ::StandardError
def to_s
'failed to crud with external service'
end
end
class FailedToCreateError...
Spring Boot - parent pom when you already have a parent pom
...perties for quickly setting versions of dependencies that you want to override
configure some plugins with default configuration (principally the Spring Boot maven plugin). So those are the things you will have to do manually if you use your own parent.
Example provided in Spring Boot documentatio...
How to determine equality for two JavaScript objects?
...es may not be enough, there may well be attributes which are not to be considered part of the object value. For example,
function MyClass(a, b)
{
var c;
this.getCLazy = function() {
if (c === undefined) c = a * b // imagine * is really expensive
return c;
}
}
...
Why are iframes considered dangerous and a security risk?
Why are iframes considered dangerous and a security risk? Can someone describe an example of a case where it can be used maliciously?
...
What's the difference between the atomic and nonatomic attributes?
...
The last two are identical; "atomic" is the default behavior (note that it is not actually a keyword; it is specified only by the absence of nonatomic -- atomic was added as a keyword in recent versions of llvm/clang).
Assuming that you are ...
Git fast forward VS no fast forward merge
...w us to perform fast forward and no fast fast forward branch merging. Any ideas when to use fast forward merge and when to use no fast forward merge?
...
Difference between a Seq and a List in Scala
...
@huynhjl That's beside the point. I was drawing parallels between what exists in Java and what exists in Scala, and there just isn't any concept of mutable/immutable collections in Java.
– Daniel C. Sobral
...
Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
... exception helper in Visual Studio 2017 see the end of this answer)
Consider this code:
String s = null;
Console.WriteLine(s.Length);
This will throw a NullReferenceException in the second line and you want to know why .NET doesn't tell you that it was s that was null when the exception was th...
What is the difference between .*? and .* regular expressions?
...
It is the difference between greedy and non-greedy quantifiers.
Consider the input 101000000000100.
Using 1.*1, * is greedy - it will match all the way to the end, and then backtrack until it can match 1, leaving you with 1010000000001.
.*? is non-greedy. * will match nothing, but then will ...
How can I call a custom Django manage.py command directly from a test driver?
...gement_task.Command()
opts = {} # kwargs for your command -- lets you override stuff for testing...
cmd.handle_noargs(**opts)
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