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What are copy elision and return value optimization?
...w";//RVO
return 0;
}
**Output without -fno-elide-constructors**
root@ajay-PC:/home/ajay/c++# ./a.out
Constructor
Constructor
Constructor
Constructor
Destructor
Destructor
Destructor
Destructor
**Output with -fno-elide-constructors**
root@ajay-PC:/home/ajay/c++# g++...
Postgresql: password authentication failed for user “postgres”
...count only by using the postgres OS user account.
Assuming, that you have root access on the box you can do:
sudo -u postgres psql
If that fails with a database "postgres" does not exists error, then you are most likely not on a Ubuntu or Debian server :-) In this case simply add template1 to th...
Is there any difference between __DIR__ and dirname(__FILE__) in PHP?
...). This
directory name does not have a
trailing slash unless it is the root
directory. (Added in PHP 5.3.0.)
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Npm install failed with “cannot run in wd”
...pm install .
So when I try npm install , it says that I need to run it as root or adminisrator:
5 Answers
...
Visual Studio immediate window command for Clear All
...through, there's a whole slew of them, some of which might even have their roots in MS-DOS DEBUG.EXE (specifically >d, >g, >p, >q, and >t come to mind).
Also worth noting, as it's only two keys to press: Context menu > Clear All invokes the same command and it can be navigated u...
Node.js EACCES error when listening on most ports
...
Running on your workstation
As a general rule, processes running without root privileges cannot bind to ports below 1024.
So try a higher port, or run with elevated privileges via sudo. You can downgrade privileges after you have bound to the low port using process.setgid and process.setuid.
Ru...
XML Serialization - Disable rendering root element of array
Can I somehow disable rendering of root element of collection?
3 Answers
3
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How to check if a user likes my Facebook Page or URL using Facebook's API
... }
</style>
</head>
<body>
<div id="fb-root"></div>
<script>
window.fbAsyncInit = function() {
FB.init({
appId : 'YOUR_APP_ID', // App ID
channelUrl : 'http(s)://YOUR_APP_DOMAIN/channel.html', // Channel Fi...
How to split a comma-separated value to columns
... @S = 'ab,cd,ef,gh,ij',
@Split = ','
SELECT @X = CONVERT(xml,' <root> <myvalue>' +
REPLACE(@S,@Split,'</myvalue> <myvalue>') + '</myvalue> </root> ')
SELECT T.c.value('.','varchar(20)'), --retrieve ALL values at once
T.c.value('(/root/my...
Creating a singleton in Python
...r the task.
Here is a quote from http://googletesting.blogspot.com/2008/08/root-cause-of-singletons.html:
Now, there is one kind of Singleton which is OK. That is a singleton where all of the reachable objects are immutable. If all objects are immutable than Singleton has no global state, as everyt...