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Please explain the exec() function and its family
...o forth.
But they're not required to be used together. It's perfectly acceptable for a program to call fork() without a following exec() if, for example, the program contains both parent and child code (you need to be careful what you do, each implementation may have restrictions).
This was used qui...
Peak signal detection in realtime timeseries data
...score) of 3.5 corresponds to a signaling probability of 0.00047 (from this table), which implies that you expect a signal once every 2128 datapoints (1/0.00047). The threshold therefore directly influences how sensitive the algorithm is and thereby also how often the algorithm signals. Examine your ...
Are there any disadvantages to always using nvarchar(MAX)?
..., the value gets pushed out of row based on may more factors, including sp_tableoptions: msdn.microsoft.com/en-us/library/ms173530.aspx. VARCHAR(255) types can also b pushed out of row, the 'overhead' mentioned may be exactly the same for MAX and 255. It compares MAX types with TEXT types, when they...
Releasing memory in Python
...le.
The costs are:
Process startup is kind of slow on some platforms, notably Windows. We're talking milliseconds here, not minutes, and if you're spinning up one child to do 300 seconds' worth of work, you won't even notice it. But it's not free.
If the large amount of temporary memory you use r...
How to create a new database after initally installing oracle database 11g Express Edition?
...O myschema;
Now you can connect via Oracle SQL Developer and create your tables.
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'printf' vs. 'cout' in C++
...ze_t, you need to use %zd, while int64_t will require using %"PRId64". The tables are available at http://en.cppreference.com/w/cpp/io/c/fprintf and http://en.cppreference.com/w/cpp/types/integer.
You can't print the NUL byte, \0
Because printf uses C strings as opposed to C++ strings, it cannot p...
How do I create a simple 'Hello World' module in Magento?
...provides to get the information you need. I know it's all there in the SQL tables, but it's best not to think of grabbing data using raw SQL queries, or you'll go mad.
Final disclaimer. I've been using Magento for about two or three weeks, so caveat emptor. This is an exercise to get this straight ...
IEnumerable vs List - What to Use? How do they work?
...spotted would have to be returned to run Feline. On the other hand an IQuertable<T> will allow the query to be refined, pulling down only Spotted Felines.
– Nate
Aug 20 '14 at 17:49
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What is HTML5 ARIA?
...UI). HTML includes a great many features to deal with documents (P, h3,UL,TABLE) but only basic UI elements such as A, INPUT and BUTTON. Windows and other operating systems support APIs that allow (Assistive Technology) AT to access the functionality of UI controls. Internet Explorer and other br...
What is the difference between a process and a thread?
...s needed to execute a program. A process has a virtual address space, executable code, open handles to system objects, a security context, a unique process identifier, environment variables, a priority class, minimum and maximum working set sizes, and at least one thread of execution. Each process i...