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Is gcc 4.8 or earlier buggy about regular expressions?
...ow open source works: Release early, release often -- unfortunately in the case of <regex> we only got the early part right and not the often part that would have finished the implementation.
Most parts of the library were more complete and are now almost fully implemented, but <regex>...
Is a `=default` move constructor equivalent to a member-wise move constructor?
...t decl-specifier-seqopt declarator virt-specifier-seqopt = default ;
is called an explicitly-defaulted definition. A function that is explicitly defaulted shall
be a special member function,
have the same declared function type (except for possibly differing ref-qualifiers and except that in th...
What is hashCode used for? Is it unique?
...ethod in every controls, items, in WP7, which return a sequence of number. Can I use this hashcode to identify an item? For example I want to identify a picture or a song in the device, and check it whereabout. This could be done if the hashcode given for specific items is unique.
...
std::function and std::bind: what are they, and when should they be used?
...
std::bind is for partial function application.
That is, suppose you have a function object f which takes 3 arguments:
f(a,b,c);
You want a new function object which only takes two arguments, defined as:
g(a,b) := f(a, 4, b);
g is a "partial application" of ...
What Makes a Method Thread-safe? What are the rules?
...ly references variables scoped within that method then it is thread safe because each thread has its own stack:
In this instance, multiple threads could call ThreadSafeMethod concurrently without issue.
public class Thing
{
public int ThreadSafeMethod(string parameter1)
{
int numbe...
When to use the brace-enclosed initializer?
...tended to be the exact value of the object, use copy (=) initialization (because then in case of error, you'll never accidentally invoke an explicit constructor, which generally interprets the provided value differently). In places where copy initialization is not available, see if brace initializat...
Why always ./configure; make; make install; as 3 separate steps?
...
Because each step does different things
Prepare(setup) environment for building
./configure
This script has lots of options that you should change. Like --prefix or --with-dir=/foo. That means every system has a different c...
WebAPI Multiple Put/Post parameters
... "Name": "jhon",
"Id": 1,
};
var product = {
"Name": "table",
"CategoryId": 5,
"Count": 100
};
var employee = {
"Name": "Fatih",
"Id": 4,
};
var myData = {};
myData.customerData = customer;
myData.productData = product;
myData.employeeData = employee;
$.ajax({
type: 'PO...
What is the difference between “#!/usr/bin/env bash” and “#!/usr/bin/bash”?
...it in a specific place on the system, as those paths may be in different locations on different systems. As long as it's in your path, it will find it.
One downside is that you will be unable to pass more than one argument (e.g. you will be unable to write /usr/bin/env awk -f) if you wish to suppo...
Difference between Big-O and Little-O Notation
... says, essentially
For at least one choice of a constant k > 0, you can find a constant a such that the inequality 0 <= f(x) <= k g(x) holds for all x > a.
Note that O(g) is the set of all functions for which this condition holds.
f ∈ o(g) says, essentially
For every choice...