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namespaces for enum types - best practices
... a class you can:
prohibit (sadly, not compile-time) C++ from allowing a cast from invalid value,
set a (non-zero) default for newly-created enums,
add further methods, like for returning a string representation of a choice.
Just note that you need to declare operator enum_type() so that C++ wou...
Intent - if activity is running, bring it to front, else start a new one (from notification)
...ificationCompat.Builder(THIS_CONTEXT)
.setSmallIcon(R.drawable.cast_ic_notification_0)
.setContentTitle("Title")
.setContentText("Content")
.setContentIntent(intent)
.setPriority(PRIORITY_HIGH) //private static final PRIORITY_HIGH = 5;
...
How to detect if a variable is an array
...ies
'0' in Object(obj) // include array-likes with inherited entries
The cast to object is necessary to work correctly for array-like primitives (ie strings).
Here's the code for robust checks for JS arrays:
function isArray(obj) {
return Object.prototype.toString.call(obj) === '[object Arra...
Mockito: Trying to spy on method is calling the original method
...checking, whereas any() family of methods was created simply to avoid type casting of the argument.
– Kevin Welker
Nov 17 '16 at 0:05
...
Why CancellationToken is separate from CancellationTokenSource?
...
That might still result in a crafty programmer casting to CancellationTokenSource. You'd think you could just say "don't do that", but people (including me!) do occasionally do these things anyway to get at some hidden functionality, and it'd happen. That's my current the...
What is the C# equivalent to Java's isInstance()?
...
Depends, use is if you don't want to use the result of the cast and use as if you do. You hardly ever want to write:
if(foo is Bar) {
return (Bar)foo;
}
Instead of:
var bar = foo as Bar;
if(bar != null) {
return bar;
}
...
How can I get the SQL of a PreparedStatement?
...
It doesn't work and throws ClassCastException: java.lang.ClassCastException: oracle.jdbc.driver.T4CPreparedStatement cannot be cast to com.mysql.jdbc.JDBC4PreparedStatement
– Ercan
Apr 4 '19 at 13:15
...
Why is the default value of the string type null instead of an empty string?
..., and (2) an unfortunate extra layer of boxing indirection any time it was cast to Object. Given that the heap representation of string is unique, having special treatment to avoid extra boxing wouldn't have been much of a stretch (actually, being able to specify non-default boxing behaviors would ...
Why is Multiple Inheritance not allowed in Java or C#?
...s a lot of complexity into the
implementation. This complexity
impacts casting, layout, dispatch,
field access, serialization, identity
comparisons, verifiability,
reflection, generics, and probably
lots of other places.
You can read the full article here.
For Java, you can read th...
How to avoid warning when introducing NAs by coercion
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