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Regular expression to match any character being repeated more than 10 times
...ckslashes, e.g. Emacs would make you write \(.\)\1\{9,\} here.
If a whole string should consist of 9 or more identical characters, add anchors around the pattern:
my $regex = qr/^(.)\1{9,}$/;
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What's best SQL datatype for storing JSON string?
What's the best SQL datatype for storing JSON string?
5 Answers
5
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Why is reading lines from stdin much slower in C++ than Python?
I wanted to compare reading lines of string input from stdin using Python and C++ and was shocked to see my C++ code run an order of magnitude slower than the equivalent Python code. Since my C++ is rusty and I'm not yet an expert Pythonista, please tell me if I'm doing something wrong or if I'm mis...
What is stack unwinding?
... char* pleak = new char[1024]; // might be lost => memory leak
std::string s( "hello world" ); // will be properly destructed
if ( x ) throw std::runtime_error( "boom" );
delete [] pleak; // will only get here if x == 0. if x!=0, throw exception
}
int main()
{
try
{
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Why is the use of alloca() not considered good practice?
...pers when I couldn't fix it), it wasn't straight alloca, it was one of ATL string conversion macros.
So the lesson is - do not use alloca in functions that you think might be inlined.
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In C#, why is String a reference type that behaves like a value type?
A String is a reference type even though it has most of the characteristics of a value type such as being immutable and having == overloaded to compare the text rather than making sure they reference the same object.
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Cookies vs. sessions
...omes invalid. If it was all based on cookies, a user (or hacker) could manipulate their cookie data and then play requests to your site.
Edit: I don't think there is any advantage to using cookies, other than simplicity. Look at it this way... Does the user have any reason to know their ID#? Ty...
How to initialize all members of an array to the same value?
...8(...) STRUCTVAL_32(__VA_ARGS__), STRUCTVAL_16(__VA_ARGS__)
struct Pair { char key[16]; char val[32]; };
struct Pair p_data[] = { STRUCTVAL_48("Key", "Value") };
int a_data[][4] = { STRUCTVAL_48(12, 19, 23, 37) };
macro names are negotiable.
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Master-master vs master-slave database architecture?
... this is that it is very hard to preserve absolute consistency. See the wikipedia article for more.
Wikipedia seems to have a nice summary of the advantages and disadvantages
Advantages
If one master fails, other masters will continue to update the
database.
Masters can be located ...
Executing multi-line statements in the one-line command-line?
...rehension, lambdas, sys.stdout.write, the "map" builtin, and some creative string interpolation, you can do some powerful one-liners.
The question is, how far do you want to go, and at what point is it not better to write a small .py file which your makefile executes instead?
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