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How to get std::vector pointer to the raw data?
...ion, so its address cannot be taken).
Assuming the container has at least one element in it, you need to get the address of the initial element of the container, which you can get via
&something[0] or &something.front() (the address of the element at index 0), or
&*something.begin()...
Why is conversion from string constant to 'char*' valid in C but invalid in C++
...ds on it (like your first example) should no longer compile.
You've noted one way to allow the code to compile: although the implicit conversion has been removed, an explicit conversion still works, so you can add a cast. I would not, however, consider this "fixing" the code.
Truly fixing the code...
How do you copy the contents of an array to a std::vector in C++ without looping?
... that the values are plain-old data (POD) types.
Also, worth noting that none of these really avoids the for loop--it's just a question of whether you have to see it in your code or not. O(n) runtime performance is unavoidable for copying the values.
Finally, note that C-style arrays are perfectl...
C++ where to initialize static const
...
Anywhere in one compilation unit (usually a .cpp file) would do:
foo.h
class foo {
static const string s; // Can never be initialized here.
static const char* cs; // Same with C strings.
static const int i = 3; // Integral...
Boolean vs tinyint(1) for boolean values in MySQL
...ng multiple boolean values in a BIT(morethan1) column. So if you only have one boolean field, using tinyint is the same as bit in InnoDB, and is preferable since tinyint is typically easier to work with.
– billmalarky
Apr 16 '13 at 18:59
...
How to Query an NTP Server using C#?
...
This is one of the few pieces of code that are good enough to be cut-and-pasted directly from the Internet into production code (after testing and review of course).
– dodgy_coder
Sep 23 '14 at ...
How to detect page zoom level in all modern browsers?
...ing the zoom level.
Edit (2011-12-12): I've added a project that can be cloned: https://github.com/tombigel/detect-zoom
IE8: screen.deviceXDPI / screen.logicalXDPI (or, for the zoom level relative to default zoom, screen.systemXDPI / screen.logicalXDPI)
IE7: var body = document.body,r = body.getB...
'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine
...You're looking for:
The 2007 Office System Driver: Data Connectivity Components.
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Redis: possible to expire an element in an array or sorted set?
...e score. It's then trivial to delete items by score range, which could be done periodically, or only on every write, with reads always ignoring the out of range elements, by reading only a range of scores.
More here: https://groups.google.com/forum/#!topic/redis-db/rXXMCLNkNSs
...
How to Use Order By for Multiple Columns in Laravel 4?
...esc'),
array('column' => 'coloumn2', 'direction' => 'asc')
);
one more way to do it is iterate in loop,
$query = DB::table('my_tables');
foreach ($request->get('order_by_columns') as $column => $direction) {
$query->orderBy($column, $direction);
}
$results = $query->g...