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How to model type-safe enum types?
...y, Long] and add a value say Mon to it the compiler throws an invalid type error. Expected Weekday.Weekday found Value? Why does this happen?
– Sohaib
Jun 14 '15 at 18:30
...
Upgrade python in a virtualenv
... just use virtualenv". EDIT: actually, it does work! It just also shows an error message about "ensurepip".
– rspeer
May 18 '17 at 20:01
...
Go build: “Cannot find package” (even though GOPATH is set)
...onment variables several times it still didn't work. I encountered several errors including 'Cannot find package' and 'unrecognized import path'. After trying to reinstall with this solution by the instructions on golang.org (including the uninstall part) still encountered problems.
Took me some ti...
How do I address unchecked cast warnings?
... output.put(k, v);
} else {
throw new AssertionError(
"Cannot cast to HashMap<"+ keyClass.getSimpleName()
+", "+ valueClass.getSimpleName() +">"
+", value "+ value +" is not a "+ valueClass.getSimpleName()
...
Disable browser's back button
... browser, but you can make it so that your application breaks (displays an error message, requiring the user to start over) if the user goes back.
One approach I have seen for doing this is to pass a token on every URL within the application, and within every form. The token is regenerated on ever...
Sending a JSON to server and retrieving a JSON in return, without JQuery
...e JSON data to the REST API that is hosted o the localhost but getting the error XHR failed loading: POST
– viveksinghggits
Jul 6 '17 at 17:34
...
What is the scope of variables in JavaScript?
...perties on the global object.
Examples
The following will throw a ReferenceError because the namesx, y, and z have no meaning outside of the function f.
function f() {
var x = 1
let y = 1
const z = 1
}
console.log(typeof x) // undefined (because var has function scope!)
console.log(t...
How can I reorder a list? [closed]
... ran it under 2.7.5 and it still works just fine. Do you get some sort of error?
– Mark
Jul 20 '15 at 2:44
no error, ...
What does the `#` operator mean in Scala?
...a2 = new A
a2: A = A@4bed4c8
scala> a2.f(new a1.B)
<console>:11: error: type mismatch;
found : a1.B
required: a2.B
a2.f(new a1.B)
^
When you declare a class inside another class in Scala, you are saying that each instance of that class has such a subc...
Checking for empty arrays: count vs empty
...
empty() is too forgiving of errors. I just spent 2 hours debugging a subclass that tested empty() on a private member variable of its superclass (the scope of the superclass's member variable SHOULD have been protected, but empty() returned no errors ...