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Free space in a CMD shell
...o put the free space into a variable one could use the following: @FOR /F "tokens=2 delims==" %%S IN ('wmic /NODE:"%COMPUTERNAME%" LogicalDisk Where ^(DriveType^="3" and DeviceID^="%some_folder:~0,2%"^) Get FreeSpace /VALUE') DO @SET freespace=%%S
– Davor Josipovic
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How do I declare a 2d array in C++ using new?
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Remember that anything allocated with new is created on the heap and must be de-allocated with delete, just keep this in mind and be sure to delete this memory from the heap when you're done with it to prevent leaks.
– Kekoa
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How to declare std::unique_ptr and what is the use of it?
...t of scope.
This way you do not have to remember doing delete on objects allocated dynamically - the destructor of the smart pointer will do that for you - nor to worry about whether you won't dereference a (dangling) pointer to an object that has been destroyed already:
{
unique_ptr<int&g...
How does free know how much to free?
... pointer you like as an argument to free, how does it know the size of the allocated memory to free? Whenever I pass a pointer to some function, I have to also pass the size (ie an array of 10 elements needs to receive 10 as a parameter to know the size of the array), but I do not have to pass the s...
How to send an email from JavaScript
... var form_id_js = "javascript_form";
var data_js = {
"access_token": "{your access token}" // sent after you sign up
};
function js_onSuccess() {
// remove this to avoid redirect
window.location = window.location.pathname + "?message=Email+Successfully+Sent%21&...
How do I download a tarball from GitHub using cURL?
...ix.
You can also retrieve the archive of a private repo, by specifying -u token:x-oauth-basic option to curl. Replace token with a personal access token.
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What are the dangers when creating a thread with a stack size of 50x the default?
...f the data ( float[] s) that I'll be accesing onto the stack (using stackalloc ).
8 Answers
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Why use double indirection? or Why use pointers to pointers?
...****biolibrary;
char ******lol;
//fill data structure
word = malloc(4 * sizeof *word); // assume it worked
strcpy(word, "foo");
sentence = malloc(4 * sizeof *sentence); // assume it worked
sentence[0] = word;
sentence[1] = word;
sentence[2] = word;
sentence[3] =...
How does this checkbox recaptcha work and how can I use it?
...d and the server stores this information in a temporary storage (marks the token: this token was activated by a human). When you submit the form, a hidden field sends the token which was activated, then when the server validates the form information it will recognize that the token was activated. If...
C++ Object Instantiation
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On the contrary, you should always prefer stack allocations, to the extent that as a rule of thumb, you should never have new/delete in your user code.
As you say, when the variable is declared on the stack, its destructor is automatically called when it goes out of scope...