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How assignment works with Python list slice?
...ce of a with the contents of b.
Although the syntax is similar (I imagine by design!), these are two different operations.
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Is mathematics necessary for programming? [closed]
...9 years old and it would be a stretch to say I had learnt much mathematics by that stage. However, with a bit of effort I was able to understand variables, for loops, goto statements (forgive me, I was Vic 20 BASIC and I hadn't read any Dijkstra yet) and basic co-ordinate geometry to put graphics on...
Is unsigned integer subtraction defined behavior?
...operands can never overflow,
because a result that cannot be represented by the resulting unsigned integer type is
reduced modulo the number that is one greater than the largest value that can be
represented by the resulting type.
(ISO/IEC 9899:1999 (E) §6.2.5/9)
As you can see, (unsig...
How do I alter the position of a column in a PostgreSQL database table?
...
the pg_attribute table. The only way
to change column order is either by
recreating the table, or by adding
columns and rotating data until you
reach the desired layout.
That's pretty weak, but in their defense, in standard SQL, there is no solution for repositioning a column either. D...
Node.js vs .Net performance
...in to get queued up. If you're serving "Hello World" apps like the example by @shankar, then this might not matter that much because the threads aren't going to be blocked and you're going to be able to handle a lot of requests before you run out of threads. The problem with the ASP.NET model comes...
What is the difference between concurrent programming and parallel programming?
...mproving throughput. The difficulties of concurrent programming are evaded by making control flow deterministic. Typically, programs spawn sets of child tasks that run in parallel and the parent task only continues once every subtask has finished. This makes parallel programs much easier to debug th...
How do I remove javascript validation from my eclipse project?
... wildcard pattern, or click Browse button to mention the JavaScript source by name.
The information about JavaScript source inclusion/exclusion is saved into .settings/.jsdtscope file. Do not forget to add it to your SCM.
Here is how configuration looks with jQuery files removed from validation:...
Using member variable in lambda capture list inside a member function
...e member:
auto& tmp = grid;
auto lambda = [ tmp](){}; // capture grid by (a single) copy
auto lambda = [&tmp](){}; // capture grid by ref
C++14:
auto lambda = [ grid = grid](){}; // capture grid by copy
auto lambda = [&grid = grid](){}; // capture grid by ref
example: https://godbo...
Is there a faster/shorter way to initialize variables in a Rust struct?
...
You can provide default values for your struct by implementing the Default trait. The default function would look like your current new function:
impl Default for cParams {
fn default() -> cParams {
cParams {
iInsertMax: -1,
iUpdate...
Difference between Observer, Pub/Sub, and Data Binding
...d changes on object B.
Observer, or Observable/Observer
A design pattern by which an object is imbued with the ability to notify others of specific events - typically done using actual events, which are kind of like slots in the object with the shape of a specific function/method. The observable i...