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What is a race condition?
...read scheduling algorithm can swap between threads at any time, you don't know the order in which the threads will attempt to access the shared data. Therefore, the result of the change in data is dependent on the thread scheduling algorithm, i.e. both threads are "racing" to access/change the data....
C++ Returning reference to local variable
...dies, making the reference returned from the function worthless because it now refers to an object that doesn't exist.
int main()
{
int& p = func1();
/* p is garbage */
}
The second version does work because the variable is allocated on the free store, which is not bound to the lifeti...
Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
Git has a well-known, or at least sort-of-well-known, empty tree whose SHA1 is:
3 Answers
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(HTML) Download a PDF file instead of opening them in browser when clicked
...at is that this was answered 4 years ago and as Sarim points out, there is now the HTML 5 download attribute that can handle this.
I agree, and think Sarim's answer is good (it probably should be the chosen answer if the OP ever returns). However, this answer is still the reliable way to handle it...
How can I get the count of milliseconds since midnight for the current?
... current time as a number of milliseconds (not count from epoch).
Instant.now() // Get current moment in UTC, then…
.get( ChronoField.MILLI_OF_SECOND ) // interrogate a `TemporalField`.
2017-04-25T03:01:14.113Z → 113
Get the fractional second in nan...
What's the difference between passing by reference vs. passing by value?
...by value vs. pass by reference" distinction as defined in the CS theory is now obsolete because the technique originally defined as "pass by reference" has since fallen out of favor and is seldom used now.1
Newer languages2 tend to use a different (but similar) pair of techniques to achieve the sam...
iPhone UIView Animation Best Practice
...ify an arbitrary CoreImage filter to use as a transition, but as it stands now you can't do this on the iPhone, which lacks CoreImage.
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How can one close HTML tags in Vim quickly?
...y exact rename it to "html.vim" so that it will effect HTML files as well. Now, I have two of the exact same files in ~/.vim/ftplugin (xml.vim and html.vim).
– user2719875
Jun 11 '15 at 19:55
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How to write a large buffer into a binary file in C++, fast?
...es 2-5%.
Thanks a lot to everyone.
Update: 5 years have passed it's 2017 now. Compilers, hardware, libraries and my requirements have changed. That's why I made some changes to the code and did some new measurements.
First up the code:
#include <fstream>
#include <chrono>
#include &l...
How remove word wrap from textarea?
...ut you can set wrap="soft" to explicitly disable wrap:
<textarea name="nowrap" cols="30" rows="3" wrap="soft"></textarea>
EDIT: The "wrap" attribute is not officially supported. I got it from the german SELFHTML page (an english source is here) that says IE 4.0 and Netscape 2.0 suppor...