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How to clear ostringstream [duplicate]
...each iteration, or I need to use this method? For example, for (int i=0; i<100; ++i) { std::ostringstream foo; foo << "bar"; std::cout << foo.str() << " ";}. Will this print: bar bar bar [...] or bar barbar barbarbar [...]?
– Thanasis Papoutsidakis
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How to validate an email address in PHP
...afest way to check whether an email address is well-formed is to use the filter_var() function:
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
// invalid emailaddress
}
Additionally you can check whether the domain defines an MX record:
if (!checkdnsrr($domain, 'MX')) {
// domain is n...
How I can delete in VIM all text from current line to end of file?
...s head supplies with eg: head -n20 hugefile for the first 20 lines. n defaults to 10.
– drevicko
Oct 30 '12 at 0:38
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Why does Git treat this text file as a binary file?
...nary, because text is defined as ASCII-based (that's the only thing the built-in diff will give usable results for) and UTF-16 is not. Yes, there is a way to tell git to use special diff for pattern defined files (using .gitattributes).
– Jan Hudec
Jul 28 '11 a...
twitter bootstrap typeahead ajax example
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I would like to point out that using this method results in an AJAX called being made for every keystroke on the input. If the server is returning essentially static data (i.e. not really doing anything with the query), then this can be quite wasteful.
– D...
Impossible to Install PG gem on my mac with Mavericks
...ot writable. You should change its permissions. And everything is brew fault,after i brew install/link postgresql The installation goes to: Linking /usr/local/Cellar/postgresql/9.3.4... which is in my case a VERY CONFLICTIVE FOLDER, downloading pg and gem install using it solve the problem THANK...
How to convert int to QString?
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Yet another option is to use QTextStream and the << operator in much the same way as you would use cout in C++:
QPoint point(5,1);
QString str;
QTextStream(&str) << "Mouse click: (" << point.x() << ", " << point.y() << ").";
// OUTPU...
Best practice for creating millions of small temporary objects
...leave a CPU register. For instance, consider this for-loop
for(int i=0, i<max, i++) {
// stuff that implies i
}
Let's not think about loop unrolling (an optimisations that the JVM heavily performs on your code). If max is equal to Integer.MAX_VALUE, you loop might take some time to execute. ...
Foreign keys in mongo?
...are Fields... Just in case you get mixed up.
– cpu_meltdown
Jun 2 '16 at 13:39
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git status shows modifications, git checkout — doesn't remove them
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There are multiple problems the can cause this behaviour:
Line ending normalization
I've had these kinds of problems too. It comes down to git automatically converting crlf to lf. This is typically caused by mixed line endings in a singl...