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What do 'real', 'user' and 'sys' mean in the output of time(1)?
...er of context switches may also be gathered by time.
On a multi-processor machine, a multi-threaded process or a process forking children could have an elapsed time smaller than the total CPU time - as different threads or processes may run in parallel. Also, the time statistics reported come from...
How to update Python?
...ling ActivePython 2.7.
Sage recommends that you install it into a virtual machine, and provides a Oracle VirtualBox image file that can be used for this purpose. Upgrades are handled internally by issuing the sage -upgrade command.
Anaconda can be updated by using the conda command:
conda update -...
移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。visual viewport的宽度可以通过window.innerWidth 来获取，但在Android 2, Oprea mini 和 UC 8中无法正确获取。
现在我们已经有两个viewport了：layout viewport 和 visual viewport。但浏览器觉得还不够，因为现在越来越多的网站都会为移动...
When should I use RequestFactory vs GWT-RPC?
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Another plus for RequestFactory is it can be used with Android and GWT with the exact same code.
– Patrick
Mar 6 '12 at 14:08
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Why is Git better than Subversion?
...terfaces in development. Some good ones include TortoiseGit and GitHub for Mac.
Partial checkouts/clones of repositories are not possible at the moment (I read that it's in development). However, there is submodule support. Git 1.7+ supports sparse checkouts.
It might be harder to learn, even though...
How do I use vimdiff to resolve a git merge conflict?
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@AndersKitson, since you are on Mac OS X, FileMerge is perfect, free and comes with XCode.
– romainl
Feb 16 '13 at 8:27
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Git - How to use .netrc file on Windows to save user and password
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Simplest and best solution. Worked like charm with Android Studio, Source Tree and Git command line. I had to use this when Google recommended Cloud SDK credential.helper option failed and had to manually generate credentials and use with net rc file. In my case I didn't requ...
What are MVP and MVC and what is the difference?
... even violation). @Panzercrisis, This differs from MVP (like that used in Android OS) where actions route through the View to the Presenter and user have direct access to the View.
– Top-Master
Sep 29 '19 at 11:50
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Class does not implement its superclass's required members
...nt (i.e. in Objective-C, since the day I started programming Cocoa back in Mac OS X 10.0) to deal with initializers that your class is not prepared to handle. The docs have always been quite clear about your responsibilities in this regard. But how many of us bothered to fulfill them, completely and...
what exactly is device pixel ratio?
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I have no idea about the android case. It could be that different manufacturers have different ideas about logical and physical pixels... Try it out yourself on a couple of hundred different devices... Or simply assume that the values reported by the...