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What is the difference between mutex and critical section?
...s.
Mutexes can be shared between processes, but always result in a system call to the kernel which has some overhead.
Critical sections can only be used within one process, but have the advantage that they only switch to kernel mode in the case of contention - Uncontended acquires, which should be...
Easiest way to copy a table from one database to another?
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The copied table did not have primary key and auto increment set. You have to run this after ALTER TABLE db1.table1 ADD PRIMARY KEY (id); ALTER TABLE db1.table1 MODIFY COLUMN id INT AUTO_INCREMENT;
– Weston Ganger
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jQuery Validation plugin: disable validation for specified submit buttons
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Note: this doesn't work if you dynamically add the class cancel, ie $('input[type=submit]').addClass('cancel'), the class has to be present on page load.
– lolesque
Jun 13 '12 at 15:40
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Changing website favicon dynamically
...nyway, you can remove shortcut from the rel attribute. shortcut is an invalid IE-proprietary link relation!
– Mathias Bynens
Jun 7 '10 at 12:45
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Comparing strings with == which are declared final in Java
...inal and initialized with a compile-time constant expression (§15.28), is called a constant variable.
Also from JLS §15.28 - Constant Expression:
Compile-time constant expressions of type String are always "interned" so as to share unique instances, using the method String#intern().
This...
Is it safe to delete a void pointer?
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However, as mentioned in other answers, deleting a void pointer will not call destructors, which can be a problem. In that sense, it is not "safe."
There is no good reason to do what you are doing the way you are doing it. If you want to write your own deallocation functions, you can use functi...
Difference between Static and final?
...les) unless it has/creates an instance of the class.
A static method can call only other static methods and can not call a non-static method from it unless it has/creates an instance of the class.
A static method can be accessed directly by the class name and doesn’t need any object.
Syntax: C...
How to chain scope queries with OR instead of AND?
...("name = ? OR lastname = ?", 'John', 'Smith')
– CambridgeMike
Nov 9 '11 at 3:55
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This is still a...
Retrieving a List from a java.util.stream.Stream in Java 8
..., provided your stream stays sequential—otherwise you will have to put a call to sequential() before forEach.
[later edit: the reason the call to sequential() is necessary is that the code as it stands (forEach(targetLongList::add)) would be racy if the stream was parallel. Even then, it will no...
Getting full JS autocompletion under Sublime Text
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Suggestions are (basically) based on the text in the current open file and any snippets or completions you have defined (ref). If you want more text suggestions, I'd recommend:
Adding your own snippets for commonly used operations.
Adding your...