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What is the difference between 'typedef' and 'using' in C++11?
... some(1).
(1) In addition to the examples of alias templates, which has already been mentioned in the original post.
Same semantics
As governed by [dcl.typedef]/2 [extract, emphasis mine]
[dcl.typedef]/2 A
typedef-name
can also be introduced by an
alias-declaration.
The identifier following the us...
How to convert an array of strings to an array of floats in numpy?
...
Well, if you're reading the data in as a list, just do np.array(map(float, list_of_strings)) (or equivalently, use a list comprehension). (In Python 3, you'll need to call list on the map return value if you use map, since map returns an ite...
How to deal with a slow SecureRandom generator?
...or in securerandom.source in the java.security file, /dev/random/ is still read whenever SecureRandom.getSeed() (or setSeed() is called). The workaround with file:/dev/./urandom results in not reading /dev/random at all (confirmed with strace)
– matt b
Dec 16 '...
In Python, how do I use urllib to see if a website is 404 or 200?
... error (e.g. connection refused)
# ...
else:
# 200
body = resp.read()
Note that HTTPError is a subclass of URLError which stores the HTTP status code.
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...
Using the “final” modifier whenever applicable in Java [closed]
... publication of fields and can avoid the need for synchronization on later reads. (Note that for an object reference, only the field reference is immutable - things that object reference refers to can still change and that affects the immutability.)
Final static fields - Although I use enums now fo...
How do I view an older version of an SVN file?
... than trying to view a diff of the file in the command line ( very hard to read ), is there any way I could get a copy of that file to review so I can study it to recover parts?
...
Download multiple files as a zip-file using php
...e a ZIP file and stream it to the client. Something like:
$files = array('readme.txt', 'test.html', 'image.gif');
$zipname = 'file.zip';
$zip = new ZipArchive;
$zip->open($zipname, ZipArchive::CREATE);
foreach ($files as $file) {
$zip->addFile($file);
}
$zip->close();
and to stream it:...
How to handle command-line arguments in PowerShell
...beginning of the file.
You can also assign default values to your params, read them from console if not available or stop script execution:
param (
[string]$server = "http://defaultserver",
[Parameter(Mandatory=$true)][string]$username,
[string]$password = $( Read-Host "Input password...
Build fat static library (device + simulator) using Xcode and SDK 4+
...ginal invocation, invoke WHATEVER other builds are required
#
# Xcode is already building ONE target...
#
# ...but this is a LIBRARY, so Apple is wrong to set it to build just one.
# ...we need to build ALL targets
# ...we MUST NOT re-build the target that is ALREADY being built: Xcode WILL CRASH YO...
When is it acceptable to call GC.Collect?
...s of .NET 4.6 - there is the GC.TryStartNoGCRegion method (used to set the read-only value GCLatencyMode.NoGCRegion). This can itself, perform a full blocking garbage collection in an attempt to free enough memory, but given we are disallowing GC for a period, I would argue it is also a good idea to...