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Should functions return null or an empty object?
... collections the situation is usually different. I remember some guideline form MS that methods should accept null as an 'empty' list but return collections of zero-length rather than null. The same for strings. Note that you can declare empty arrays: int[] arr = new int[0];
...
Downloading a large file using curl
...
<?php
set_time_limit(0);
//This is the file where we save the information
$fp = fopen (dirname(__FILE__) . '/localfile.tmp', 'w+');
//Here is the file we are downloading, replace spaces with %20
$ch = curl_init(str_replace(" ","%20",$url));
curl_setopt($ch, CURLOPT_TIMEOUT, 50);
// write ...
Resize image in PHP
...o write some PHP code which automatically resizes any image uploaded via a form to 147x147px, but I have no idea how to go about it (I'm a relative PHP novice).
...
The difference between try/catch/throw and try/catch(e)/throw e
...on.
The second approach might be useful when you want to add additional information to the stack trace but it is used like this:
try
{
// do something
}
catch (Exception ex)
{
throw new Exception("Additional information...", ex);
}
There's a blog post discussing the differences.
...
Finding Number of Cores in Java
... @Peter, yeah, good point. I felt myself King of the Hill when performing this action with my i7 machine! :)
– Bart Kiers
Jan 21 '11 at 14:39
14
...
Insert Unicode character into JavaScript
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
...
Bootstrap combining rows (rowspan)
...ccept=".png, .jpg, .jpeg" > <!-- <input type="text" src="" class="form-control" id="imgName" size="40" ></input>--> <img id="img-upload" src="" alt="Transporter" width="300%" height="50%" class="rounded-circle" /> </div> </div>...
What exactly does stringstream do?
...se all stream functions and operators on it.
I saw it used mainly for the formatted output/input goodness.
One good example would be c++ implementation of converting number to stream object.
Possible example:
template <class T>
string num2str(const T& num, unsigned int prec = 12) {
...
What is the difference between \r and \n?
...ome compatibility situations where \r is used instead though.)
For more information, see the Wikipedia newline article.
EDIT: This is language-sensitive. In C# and Java, for example, \n always means Unicode U+000A, which is defined as line feed. In C and C++ the water is somewhat muddier, as the m...
Depend on a branch or tag using a git URL in a package.json?
...s-as-dependencies
Git URLs as Dependencies
Git urls can be of the form:
git://github.com/user/project.git#commit-ish
git+ssh://user@hostname:project.git#commit-ish
git+ssh://user@hostname/project.git#commit-ish
git+http://user@hostname/project/blah.git#commit-ish
git+https://us...