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When to use “new” and when not to, in C++? [duplicate]
...d to where necessary.
A second example of when to allocate via new is for arrays. You cannot* change the size of an in-place or stack array at run-time so where you need an array of undetermined size it must be allocated via new.
E.g.
void foo(int size)
{
Point* pointArray = new Point[size];
...
How to convert an enum type variable to a string?
...
There really is no beautiful way of doing this. Just set up an array of strings indexed by the enum.
If you do a lot of output, you can define an operator<< that takes an enum parameter and does the lookup for you.
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How to iterate over the keys and values with ng-repeat in AngularJS?
...do so! It's usually better to transform the object in the controller to an array; this makes the intent clearer and decreases the risk for strange/unpredictable behavior in certain cases. And you can sort in the usual way. :-)
– Josh David Miller
Mar 11 '14 at ...
What does immutable mean?
...ing of the number 2? It sounds absurd, yet we do this with our objects and arrays all the time.
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Best way to pretty print a hash
I have a large hash with nested arrays and hashes. I would like to simply print it out so it 'readable' to the user.
12 An...
How to get a cross-origin resource sharing (CORS) post request working
...cess-Control-Max-Age: 604800');
header("Content-type: application/json");
$array = array("ok" => $_POST["x"]);
echo json_encode($array);
This is the only way I know to truly POST cross-domain from JS.
JSONP converts the POST into GET which may display sensitive information at server logs.
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Removing carriage return and new-line from the end of a string in c#
...rimEnd, it let's you pass multiple instances of a character instead of the array. msdn.microsoft.com/en-us/library/w5zay9db(VS.71).aspx
– JP Alioto
May 16 '09 at 18:59
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How can I find the data structure that represents mine layout of Minesweeper in memory?
...can write another couple of posts. Long story short minefield stored as an array of bytes [24x36], 0x0F shows that byte is not used (playing smaller field), 0x10 - empty field, 0x80 - mine.
Part 2 of 3
Ok, let's go on with F2 button.
According to Using Keyboard Accelerators when F2 button is pr...
Practical use of `stackalloc` keyword
... computations or interop). By using stackalloc instead of a heap allocated array, you create less GC pressure (the GC needs to run less), you don't need to pin the arrays down, it's faster to allocate than a heap array, an it is automatically freed on method exit (heap allocated arrays are only deal...
How do I create test and train samples from one dataframe with pandas?
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@kuatroka np.random.rand(len(df)) is an array of size len(df) with randomly and uniformly distributed float values in range [0, 1]. The < 0.8 applies the comparison element-wise and stores the result in place. Thus values < 0.8 become True and value >= 0.8...