大约有 15,000 项符合查询结果（耗时：0.0397秒） [XML]
How does zip(*[iter(s)]*n) work in Python?
...chunk_size = 3
L = [1,2,3,4,5,6,7,8,9]
# iterate over L in steps of 3
for start in range(0,len(L),chunk_size): # xrange() in 2.x; range() in 3.x
end = start + chunk_size
print L[start:end] # three-item chunks
Following the values of start and end:
[0:3) #[1,2,3]
[3:6) #[4,5,6]
[6:9) #[...
How to run a shell script on a Unix console or Mac terminal?
...h myscript
To run a non-executable bash script, use:
bash myscript
To start an executable (which is any file with executable permission); you just specify it by its path:
/foo/bar
/bin/bar
./bar
To make a script executable, give it the necessary permission:
chmod +x bar
./bar
When a file ...
How to add reference to System.Web.Optimization for MVC-3-converted-to-4 app
...e Microsoft.AspNet.Web.Optimization
Create and configure bundle(s) in App_Start\BundleConfig.cs:
public class BundleConfig
{
public static void RegisterBundles(BundleCollection bundles) {
bundles.Add(new ScriptBundle("~/Scripts/jquery").Include(
"~/Scripts/Lib/jquery/jquery...
What is the difference between \r and \n?
...nd \n is line feed.
On "old" printers, \r sent the print head back to the start of the line, and \n advanced the paper by one line. Both were therefore necessary to start printing on the next line.
Obviously that's somewhat irrelevant now, although depending on the console you may still be able to...
Node.js setting up environment specific configs to be used with everyauth
...ronment with forever or pm2
Forever:
NODE_ENV=production forever [flags] start app.js [app_flags]
PM2 (via shell):
export NODE_ENV=staging
pm2 start app.js
PM2 (via .json):
process.json
{
"apps" : [{
"name": "My App",
"script": "worker.js",
"env": {
"NODE_ENV": "develop...
Change key pair for ec2 instance
... instance
Detach its /dev/xvda1 volume (let's call it volume A) - see here
Start new t1.micro EC2 instance, using my new key pair. Make sure you create it in the same subnet, otherwise you will have to terminate the instance and create it again. - see here
Attach volume A to the new micro instance, ...
How does Python's super() work with multiple inheritance?
...it__. So, if you define
class Third(First, Second):
...
Python will start by looking at First, and, if First doesn't have the attribute, then it will look at Second.
This situation becomes more complex when inheritance starts crossing paths (for example if First inherited from Second). Read ...
Where is SQL Server Management Studio 2012?
...n=uninstall /features=Tools 2. Did the same thing to uninstall 2012 3. Restarted my computer 3. Reinstalled SSMS 2012 using SQLManagementStudio_x86_ENU.exe /action=install /features=Tools (idea came from - kushagrarakesh.blogspot.de/2012/03/…)
– pharophy
N...
background function in Python
...ion_that_downloads, name="Downloader", args=some_args)
download_thread.start()
# continue doing stuff
You may want to check if the thread has finished before going on to other things by calling download_thread.isAlive()
...
Do C# Timers elapse on a separate thread?
...var timer = new Timer(1000);
timer.Elapsed += timer_Elapsed;
timer.Start();
Console.ReadLine();
}
static void timer_Elapsed(object sender, ElapsedEventArgs e)
{
Thread.Sleep(2000);
Debug.WriteLine(Thread.CurrentThread.ManagedThreadId);
}
you will get something like this
10
6
...