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Why is Multiple Inheritance not allowed in Java or C#?
I know that multiple inheritance is not allowed in Java and C#. Many books just say, multiple inheritance is not allowed. But it can be implemented by using interfaces. Nothing is discussed about why it is not allowed. Can anybody tell me precisely why it is not allowed?
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How to force garbage collector to run?
...ing it more than necessary is inadvisable. The code for when it should be called is well written. You should normally only self collect in specialized edge cases. stackoverflow.com/a/21961777/2710988
– Brandon Barkley
Mar 7 '19 at 19:13
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Array vs. Object efficiency in JavaScript
...an array, too:
var a3 = [];
a3[29938] = "a";
a3[32994] = "b";
It's basically an array with holes in it, because every array does have continous indexing. It's slower than arrays without holes. But iterating manually through the array is even slower (mostly).
This is an object:
var a3 = {};
a3[2...
When to use virtual destructors?
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Virtual destructors are useful when you might potentially delete an instance of a derived class through a pointer to base class:
class Base
{
// some virtual methods
};
class Derived : public Base
{
~Derived()
{
// Do some important cleanup
}
};
Her...
Tracing XML request/responses with JAX-WS
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Following options enable logging of all communication to the console (technically, you only need one of these, but that depends on the libraries you use, so setting all four is safer option). You can set it in the code like in example, or as command line parame...
Reliable way for a Bash script to get the full path to itself [duplicate]
...ing a script that isn't coming from a file in an accessible file system at all (which is perfectly possible), is not catered to there (or in any of the other answers I've seen).
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PHP multidimensional array search by value
...return $key;
}
}
return null;
}
This will work. You should call it like this:
$id = searchForId('100', $userdb);
It is important to know that if you are using === operator compared types have to be exactly same, in this example you have to search string or just use == instead ===.
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Is Zookeeper a must for Kafka?
... coordination system. So Kafka, Storm, HBase, SolrCloud to just name a few all use Zookeeper to help manage and coordinate.
Kafka is a distributed system and is built to use Zookeeper. The fact that you are not using any of the distributed features of Kafka does not change how it was built. In any ...
JavaScript module pattern with example [closed]
... Your first example (function() { /* Your code goes here */}()); is actually a IIFE (Immediately Invoking Function Expression), ok it's anonymous coz it has no name so you may even want to call it an IIAFE (Immediately Invoking Anonymous Function Expression) see more on IIFE on stackoverflow.com/...
【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...值以10 ms为单位，监控超时值可以从最小值10（100 ms）到3200（32.0 s）。超时必须大于有效的连接间隔。
3.4.3 有效连接间隔Effective Connection Interval有效连接间隔等于两个连接事件之间的时间跨度，假设从机跳过最大数量的连接事...