大约有 13,330 项符合查询结果（耗时：0.0408秒） [XML]
How to remove array element in mongodb?
...
Try the following query:
collection.update(
{ _id: id },
{ $pull: { 'contact.phone': { number: '+1786543589455' } } }
);
It will find document with the given _id and remove the phone +1786543589455 from its contact.phone array.
You can use $unset to unset the value ...
Saving images in Python at a very high quality
...his after running the commands to plot the image:
plt.savefig('destination_path.eps', format='eps')
I have found that eps files work best and the dpi parameter is what really makes them look good in a document.
UPDATE:
To specify the orientation of the figure before saving simply call the follo...
Why can't I use the 'await' operator within the body of a lock statement?
....Tasks;
public class SemaphoreLocker
{
private readonly SemaphoreSlim _semaphore = new SemaphoreSlim(1, 1);
public async Task LockAsync(Func<Task> worker)
{
await _semaphore.WaitAsync();
try
{
await worker();
}
finally
{...
What exactly does @synthesize do?
...then will result in having two ivars, namely someInt plus an autogenerated _someInt variable. Thus self.someInt and someInt will not address the same variables any more. If you don't expect such behavior as I did this might get you some headache to find out.
...
Best way to give a variable a default value (simulate Perl ||, ||= )
...s called the Null coalescing operator. You can use it like this:
$name = $_GET['name'] ?? 'john doe';
This is equivalent to
$name = isset($_GET['name']) ? $_GET['name']:'john doe';
share
|
impr...
Accessing a Shared File (UNC) From a Remote, Non-Trusted Domain With Credentials
...null for the lpLocalName and lpProvider. The dwType should be RESOURCETYPE_DISK. The lpRemoteName should be \\ComputerName.
using System;
using System.Runtime.InteropServices ;
using System.Threading;
namespace ExtremeMirror
{
public class PinvokeWindowsNetworking
{
#region Const...
AWS S3 copy files and folders between two buckets
...
A simplified example using the aws-sdk gem:
AWS.config(:access_key_id => '...', :secret_access_key => '...')
s3 = AWS::S3.new
s3.buckets['bucket-name'].objects['source-key'].copy_to('target-key')
If you want to perform the copy between different buckets, then specify the target ...
Quickly find whether a value is present in a C array?
...ount / 8
pld [r1,#128]
ldmia r1!,{r4-r7} ; pre load first set
loop_top:
pld [r1,#128]
ldmia r1!,{r8-r11} ; pre load second set
cmp r4,r2 ; search for match
cmpne r5,r2 ; use conditional execution to avoid extra branch instructions
cmpne r6,r2
cmpne r7...
How to call another controller Action From a controller in Mvc
...ublic class AController : ApiController
{
private readonly BController _bController;
public AController(
BController bController)
{
_bController = bController;
}
public httpMethod{
var result = _bController.OtherMethodBController(parameters);
....
}
}
...
Creating functions in a loop
...cated way which involved using a closure as a "function factory":
def make_f(i):
def f():
return i
return f
and in your loop use f = make_f(i) instead of the def statement.
share
|
...