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GCC -g vs -g3 GDB Flag: What is the Difference?
...
format if neither of those are supported), including GDB extensions if
at all possible.
-gvmslevel
Request debugging information and also use level to specify how much information. The default level is 2. Level 0 produces no
debug information at all. Thus, -g0 negates -g.
....
Level 3 includes e...
Representing graphs (data structure) in Python
...f._graph[node2].add(node1)
def remove(self, node):
""" Remove all references to node """
for n, cxns in self._graph.items(): # python3: items(); python2: iteritems()
try:
cxns.remove(node)
except KeyError:
pass
tr...
Best practices for circular shift (rotate) operations in C++
...,7 which is slower and takes more bytes than rol edi,7 on some CPUs (especially AMD, but also some Intel), when BMI2 isn't available for rorx eax,edi,25 to save a MOV.
MSVC: x86-64 CL19: Only recognized for constant-count rotates. (The wikipedia idiom is recognized, but the branch and AND aren't op...
Team Build Error: The Path … is already mapped to workspace
...ity TF - Team Foundation Version Control Tool (tf).
You can get a list of all workspaces by bringing up a Visual Studio Command Prompt then changing to your workspace folder and issuing the following commands:
C:\YourWorkspaceFolder>tf workspaces /owner:*
You should see your problem workspace...
Android buildscript repositories: jcenter VS mavencentral
... in the world for Java and Android OSS libraries, packages and components.
All the content in JCenter is served over a CDN, with a secure HTTPS connection. Back in the time of the migration (Android Studio 0.8) The central maven 2 repository was HTTP only and HTTPS wasn't supported. Reference: 51.6....
Why would I use a templating engine? jsp include and jstl vs tiles, freemarker, velocity, sitemesh
...scope, by controllers) to fill these placeholders.
Yes, references are really the core of VTL:
<b>Hello $username!</b>
or
#if($listFromModel.size() > 1)
You have many entries!
#end
Efficiency - <%@ include file="file.jsp" %> is more efficient than anything else, b...
JOIN queries vs multiple queries
...ase. It depends on a lot of things. Jeff Atwood (founder of this site) actually wrote about this. For the most part, though, if you have the right indexes and you properly do your JOINs it is usually going to be faster to do 1 trip than several.
...
Timer function to provide time in nano seconds using C++
...psets, so you may want to make sure you do not have those chipset. Additionally some dual core AMDs may also cause a problem. See the second post by sebbbi, where he states:
QueryPerformanceCounter() and
QueryPerformanceFrequency() offer a
bit better resolution, but have
different issues. ...
Amazon SimpleDB vs Amazon DynamoDB
...:
While SimpleDB has scaling limitations, it may be a good fit for
smaller workloads that require query flexibility. Amazon SimpleDB
automatically indexes all item attributes and thus supports query
flexibility at the cost of performance and scale.
So it's a trade off between performance...
Can you force Visual Studio to always run as an Administrator in Windows 8?
...Env\VSLauncher.exe file if you have multiple versions of Visual Studio installed. Also, the default paths to the devenv.exe files is: Visual Studio 2010 - C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\devenv.exe. Visual Studio 2012 - C:\Program Files (x86)\Microsoft Visual Studio 1...