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std::string to char*
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It won't automatically convert (thank god). You'll have to use the method c_str() to get the C string version.
std::string str = "string";
const char *cstr = str.c_str();
Note that it returns a const char *; you aren't allowed to change the...
How do I count unique values inside a list
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This is like a Counter but really inefficient cause most of the counts are thrown away, and list.count() is O(n) anyway. You don't even need to convert aa to list at all. See Vidul's answer instead.
– wjandrea
Sep 2...
How can I reload .emacs after changing it?
How can I get Emacs to reload all my definitions that I have updated in .emacs without restarting Emacs?
18 Answers
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Is Meyers' implementation of the Singleton pattern thread safe?
...rently while the variable is being initialized, the concurrent execution shall wait for completion of the initialization.
GCC and VS support for the feature (Dynamic Initialization and Destruction with Concurrency, also known as Magic Statics on MSDN) is as follows:
Visual Studio: supported sinc...
Python vs Bash - In which kind of tasks each one outruns the other performance-wise? [closed]
... google shows many results that say that, as Python is byte-compiled is usually faster. I even found this that claims that you can see an improvement of over 2000% on dictionary-based operations.
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Is an array an object in java
...In the Java programming language, arrays are objects (§4.3.1), are dynamically created, and may be assigned to variables of type Object (§4.3.2). All methods of class Object may be invoked on an array.
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Facebook database design?
...nd table that holds the UserID and then the UserID of the friend (we will call it FriendID). Both columns would be foreign keys back to the Users table.
Somewhat useful example:
Table Name: User
Columns:
UserID PK
EmailAddress
Password
Gender
DOB
Location
TableName: Friend...
How to remove the arrow from a select element in Firefox
... have done nothing.
I've come up with a simple workaround.
This essentially strips all formatting of the select box in firefox and wraps a span element around the select box with your custom style, but should only apply to firefox.
Say this is your select menu:
<select class='css-select'&...
The source was not found, but some or all event logs could not be searched
... approach for handling such issues is to register event log sources at installation time (under an administrator account), then assume that they exist at runtime, allowing any resulting exception to be treated as unexpected if a target event log source does not actually exist at runtime.
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How can I delete one element from an array by value
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I personally like [1, 2, 3, 4, 5] - [3] which results in => [1, 2, 4, 5] from irb.
– Travis
Apr 5 '12 at 19:31
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