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What is a WeakHashMap and when to use it? [duplicate]
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Elements in a weak hashmap can be reclaimed by the garbage collector if there are no other strong references to the key object, this makes them useful for caches/lookup storage.
Weak reference are not restricted to these hash tables, you can use WeakReference for sing...
Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?
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What do you mean by "attributes"?
– Bozho
Jul 22 '16 at 12:20
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show 4 more commen...
What 'sensitive information' could be disclosed when setting JsonRequestBehavior to AllowGet
... a malicious user could include your JSON in the context of their own site by using a script tag in the HTML. e.g. on www.evil.com:
<script src="http://www.example.com/User/GetUser/32"></script>
This JavaScript should be useless to www.evil.com because there should be no way of readi...
Explode PHP string by new line
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this php function explode string by newline
Attention : new line in Windows is \r\n and in Linux and Unix is \n
this function change all new lines to linux mode then split it.pay attention that empty lines will be ignored
function splitNewLine($text) {
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Parcelable encountered IOException writing serializable object getactivity()
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Caused by: java.io.NotSerializableException: com.resources.student_list.DSLL$DNode
Your DSLL class appears to have a DNode static inner class, and DNode is not Serializable.
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Do browsers parse javascript on every page load?
...nitial state is monitoring. This means that
spidermonkey is interpreting bytecode. Every time spidermonkey
interprets a backward-jump bytecode, the monitor makes note of the
number of times the jump-target program-counter (PC) value has been
jumped-to. This number is called the hit count for...
Why does Android use Java? [closed]
...igned its own adress space. All adresses you want to access are translated by MMU. You want to access adress 0x0000 and MMU translates it into for example 0x0E21. And to prevent you to change the base adress, its priviledged instruction and your program when started by OS has assigned lowest privile...
Git : List all unmerged changes in git
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If it's giving u error, try to replace master by origin as upstream.
– CodeFarmer
Dec 21 '17 at 2:08
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What is a smart pointer and when should I use one?
...o describes what was 'good' at the time, which was smart pointers provided by the Boost library. Since C++11, the standard library has provided sufficient smart pointers types, and so you should favour the use of std::unique_ptr, std::shared_ptr and std::weak_ptr.
There was also std::auto_ptr. It ...
Where does PostgreSQL store the database?
... a mac like I was, it's in ~/Library/Application Support/Postgres[ver]/var by default.
– sstringer
Jan 11 '14 at 19:00
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