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What does threadsafe mean?
Recently I tried to Access a textbox from a thread (other than the UI thread) and an exception was thrown. It said something about the "code not being thread safe" and so I ended up writing a delegate (sample from MSDN helped) and calling it instead.
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jQuery to retrieve and set selected option value of html select element
...he id's are correct and your dom validates then the following applies:
To Read Select Option Value
$('#selectId').val();
To Set Select Option Value
$('#selectId').val('newValue');
To Read Selected Text
$('#selectId>option:selected').text();
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When to use ref and when it is not necessary in C#
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Short answer: read my article on argument passing.
Long answer: when a reference type parameter is passed by value, only the reference is passed, not a copy of the object. This is like passing a pointer (by value) in C or C++. Changes to ...
Why is std::map implemented as a red-black tree?
... the tree modification is O(1) or O(log n) because the main operation is already O(log n). even after all the slightly extra work that AVL trees do results in a more tightly balanced tree which leads to slightly faster lookups. so it is a perfectly valid tradeoff and does not make AVL trees inferio...
Android Game Keeps Getting Hacked [closed]
...without paying. Less will want to hack the first level and the game will spread even further by Freemium model.
Shareware/clustered levelpacks
2) Let part of the game levels or logic stay online. Eg. when reaching for level 5 or 10 or 15, then download small parts for the game, and every time subm...
What's the safest way to iterate through the keys of a Perl hash?
...t suited to your needs.
If you just want the keys and do not plan to ever read any of the values, use keys():
foreach my $key (keys %hash) { ... }
If you just want the values, use values():
foreach my $val (values %hash) { ... }
If you need the keys and the values, use each():
keys %hash; # ...
Why is Multiple Inheritance not allowed in Java or C#?
...languages while providing too little benefit.
For a more fun and in-depth read, there are some articles available on the web with interviews of some of the language designers. For example, for .NET, Chris Brumme (who worked at MS on the CLR) has explained the reasons why they decided not to:
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Resize a large bitmap file to scaled output file on Android
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Makes it hard to read when you use variables like "b" but good answer non the less.
– Oliver Dixon
Aug 14 '12 at 10:05
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Immutability of Strings in Java
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have you perchance every tried to program in C? Just read the primer on pointers and you'll understand coobird's answer perfectly.
– Ryan Fernandes
Oct 12 '09 at 2:58
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What's the point of const pointers?
... If I were designing a new language, declared objects would be read-only ("const") by default. You'd need some special syntax, perhaps a "var" keyword, to make an object writable.
– Keith Thompson
Oct 12 '11 at 1:57
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