大约有 4,527 项符合查询结果（耗时：0.0218秒） [XML]
Installing R with Homebrew
...'s just brew install r. See @Andrew's answer below.
As of 2014 (using an Yosemite), the method is the following:
brew tap homebrew/science
brew install Caskroom/cask/xquartz
brew install r
The gcc package (will be installed automatically as a required dependency) in the homebrew/science tap alre...
What is the Windows version of cron? [closed]
...r command-line usage, you can schedule with the AT command.
For newer Microsoft OS versions, Windows Server 2012 / Windows 8, look at the schtasks command line utility.
If using PowerShell, the Scheduled Tasks Cmdlets in Windows PowerShell are made for scripting.
...
Eclipse comment/uncomment shortcut?
... + / after selecting the lines you want to comment in java editor.
On Mac/OS X you can use ⌘ + / to comment out single lines or selected blocks.
share
|
improve this answer
|
...
Android - Emulator in landscape mode, screen does not rotate
...) the emulator rotates the screen to landscape orientation but the Android OS and none of the apps rotate. So everything is sitting sideways. Is there something in the AVD configuration that needs to be set in order for the device to rotate properly?
...
How to create a GUID/UUID using iOS
... (__bridge NSString *)string;
}
EDIT: Jan, 29 2014:
If you're targeting iOS 6 or later, you can now use the much simpler method:
NSString *UUID = [[NSUUID UUID] UUIDString];
share
|
improve this...
using awk with column value conditions
... Are you sure your data is space-separated. Might some of those spaces be tabs? Try using awk to echo a single field. Does awk '{ print $8 }' give you what you'd expect?
– Rob Davis
Feb 6 '13 at 22:38
...
How to solve “Fatal error: Class 'MySQLi' not found”?
...l MySQLi.
If you think you've done that and still have a problem, please post your operating system and anything else that might help diagnose it further.
share
|
improve this answer
|
...
What does PermGen actually stand for?
...
Which answer was the accepted one at the time you posted this comment? The currently accepted answer (this one, by "Tom Hawtin - tackline") looks accurate to me. Might make sense to edit your comment so it doesn't lead people to mistrust the current accepted answer?
...
What do 'real', 'user' and 'sys' mean in the output of time(1)?
...is means executing CPU time spent in system calls within the kernel, as opposed to library code, which is still running in user-space. Like 'user', this is only CPU time used by the process. See below for a brief description of kernel mode (also known as 'supervisor' mode) and the system call mech...
How exactly does the callstack work?
...ns of programming languages work and especially how they interact with the OS/CPU. I've probably read every answer in every stack/heap related thread here on Stack Overflow, and they are all brilliant. But there is still one thing that I didn't fully understand yet.
...