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Useless use of cat?
...o grep screws up reusability, and quite possibly do so silently without an error message if the file argument exists. I. e. grep foo xyz | grep bar xyz | wc will give you how many lines in xyz contain bar while you are expecting the number of lines that contain both foo and bar. Having to change arg...
Angularjs $q.all
...to save a reference to that object.
When asynchronous callbacks (success / error) are invoked, they reference only the last deferred object and only it gets resolved, so $q.all is never resolved because it still waits for other deferred objects.
What you need is to create an anonymous function for e...
Lua string to int
...local function ToInteger(number)
return math.floor(tonumber(number) or error("Could not cast '" .. tostring(number) .. "' to number.'"))
end
In which case you explicitly convert the string (or really, whatever it is) into a number, and then truncate the number like an (int) cast would do in Ja...
What's the Android ADB shell “dumpsys” tool and what are its benefits?
...e machine app is crashed or not.
dumpsys | grep myapp | grep "Application Error"
or
adb shell dumpsys | grep myapp | grep Error
or anything that helps...etc
if app is not running you will get nothing as result.
When app is stoped messsage is shown on screen by android, process is still activ...
Why not infer template parameter from constructor?
...type of pm, is string.
Moreover, the following will always raise a compile error:
MyClass s(string("blah blah blah"));
MyClass i(3);
i = s;
This is because the declaration of the copy constructor is not templated:
MyClass(const MyClass&);
Here, the copy-constructor argument's template-type mat...
RESTful Login Failure: Return 401 or Custom Response
...t authenticated when trying explicitly. Maybe a bad request or even server error?
– Japheth Ongeri - inkalimeva
Dec 30 '18 at 10:26
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show 5...
Is there more to an interface than having the correct methods
... matching method is found, it is called. If not, some kind of NoSuchMethodError exception is thrown - but it's all done at runtime.
But in Java, a statically typed language, what type can we assign to our variable? Corn needs to inherit from Vegetable, to support grow, but cannot inherit from Ani...
Traits in PHP – any real world examples/best practices? [closed]
... foo() {}
}
class B extends A
{
use T;
}
The above will result in an error (demo). Likewise, any methods declared in the trait that are also already declared in the using class will not get copied into the class, e.g.
trait T {
public function foo() {
return 1;
}
}
class A {
use ...
Returning multiple values from a C++ function
... put the function definition of divide into a separate cpp file? I get the error error: use of ‘auto divide(int, int)’ before deduction of ‘auto’. How do I solve this?
– Adriaan
Feb 23 '18 at 20:26
...
How do I create a crontab through a script
...romising but trying the second approach (with echo), I got "crontab: usage error: file name must be specified for replace." Cron man page shows syntax as crontab [ -u user ] file, that is, with a mandatory file name. Is there some trick to get it to accept the piped data instead?
...