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What is the correct answer for cout
...r<<(std::cout, c++), c)", because std::operator<<(std::ostream&, int) does not exist. Instead, it translates to "std::cout.operator<<(c++).operator(c);", which actually does have a sequence point between the evaluation of "c++" and "c" (an overloaded operator is considered a fu...
Why can't I make a vector of references?
...this is the "actual" reason. The error about T* being impossible of T is U& is just a side-effect of the violated requirement that T must be assignable. If vector was able to precisely check the type parameter, then it would probably say "violated requirement: T& not assignable"
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select and update database record with a single queryset
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@learning well dude, it all depends on your scenario. The update method is great for mass updates, but it should set off a warning in your head when you use it that you need to review any signals attached to that object that might also need to be m...
“find: paths must precede expression:” How do I specify a recursive search that also finds files in
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By way of example, you can see what's happening if you do echo *test.c ... the result won't be echo expanding the wildcard, but the shell itself. The simple lesson is if you're using wildcards, quote the filespec :-)
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Get real path from URI, Android KitKat new storage access framework [duplicate]
...t;= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
fi...
push_back vs emplace_back
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In addition to what visitor said :
The function void emplace_back(Type&& _Val) provided by MSCV10 is non conforming and redundant, because as you noted it is strictly equivalent to push_back(Type&& _Val).
But the real C++0x form of emplace_back is really useful: void emplace_bac...
Eclipse jump to closing brace
...changing perspectives makes it work again. So, for example, when I have a PHP file open, but, say, the Java perspective active, pressing Ctrl + Shift + P does nothing. For the same file with the PHP perspective active, pressing Ctrl + Shift + P does exactly what you'd expect and puts my cursor bes...
How do you run a command for each line of a file?
For example, right now I'm using the following to change a couple of files whose Unix paths I wrote to a file:
9 Answers
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How to get the Full file path from URI
...e need to
// deal with different Uris.
if (needToCheckUri && DocumentsContract.isDocumentUri(context.getApplicationContext(), uri)) {
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
f...
How to include JavaScript file or library in Chrome console?
...ch to download resource
(Mozilla docs) and then eval to execute it.
For example to download Angular1 you need to type:
fetch('https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js')
.then(response => response.text())
.then(text => eval(text))
.then(() => { /* ...